Siemens C35 Service Manual
Local Service Organization Service Manual
C 3 5 S e r i e s
C 3 5 S e r i e s
S I E M E N S C O M M U N I C AT I O N S U N L I M I T E D
V1.0
Table of Content
C H A P T E R 1
Cellular Communication
Coverage Concept 1
GSM Network Architecture 2
Subscriber Identity Module 3
SIM Application Toolkit 4
Extended GSM 900 - EGSM 5
Built-in Modem 5
Data Application 6
C H A P T E R 2
Level 2 Service Guide
Introduction 7
C35 Series Technical Information 8
Accessories 10
General Information 11
C35 Series Exploded Diagram 13
Mechanical Concept 14
Hardware Concept – Block diagram 15
Hardware Description 16
Power Supply Concept 18
Over voltage Condition 18
Battery 19
Short Circuit Protection 19
Charging 19
Deep Discharge Battery 20
C35 Spare Parts Level 2 21
Disassemble the C35 22
Disassemble/Assemble Lower Housing 24
Disassemble/Assemble Control Board Assy 25
Disassemble/Assemble Upper Housing 27
Assemble the C35 28
Mobile Software Programming 30
Language Groups 32
Customer Specific Initialization 34
International Mobile Equipment Identity 34
Phone Unblocking 35
C H A P T E R 3
Siemens Service Equipment
Introduction 37
Other equipment 39
Software Installation 40
Configuring the test software 41
Running the test sequence 42
ANNEX A 46
ANNEX B 49
C H A P T E R 4
Level 2.5 Repair Document
Introduction 50
Antenna Connector 51
Ringer 55
Bottom Connector (Lumberg) 58
Display Connector 62
Keyboard LED 66
Display LED 69
Infrared Diodes 73
ANNEX C
PC Adapter Cable & Accessories C35 76
Power Plug for C35 77
Car installation Ratio Unit, C35 78
Car Installation kit Handfree kit 79
Car Installation kit Handfree Pro. 80
Car Installation Comfort GPS, C35 81
References 83
V1.0 ii
Cellular Communication
Coverage Concept.
he cellular systems is made up of numerous transmitting and receiving
sites, whose individual coverage areas partially overlap. The concept
of frequency re-use, same frequency is used by several sites, allows a
high traffic density in a wide area. Due to the limited transmission range of the
terminals, cellular systems are based on a large number of base stations on
the infrastructure side, scattered over the area to cover, with each covering a
fairly small geographical zone called cell. Cells are often represented by
hexagons (see figure 1.1.).
T
FIGURE 1.1 CELLULAR COVERAGE REPRESENTATION.
V1.0 iii
Chapter
1
GSM Network Architecture.
GSM network can be broadly divided into three broad parts, namely:
1. Mobile Station(MS) carried by the subscriber,
2. Base Station Sub-system(BSS) which controls the radio link with the mobile station.
3. Mobile Switching Center(MSC) which performs the switching of calls between the mobile
users, and between mobile and fixed network users.
FIGURE 1.2 GSM ARCHITECTURE
Each mobile station is given a unique identity. As soon as the mobile phone is turned on, it
registers with the network and is authenticated, as such the network could always find the mobile
phone.
Larger amount of data is being exchanged to and from the following functional blocks in the
MSC:
Visitor Location Register, VLR
Stores information about mobile subscribers that enter it coverage area which is associated with
the geographical area where the mobile is currently roaming. When there is an incoming call for
the mobile, the HLR is interrogated about the present address of the VLR.
Home Location Register, HLR
A database that contains all data concerning the subscription of the mobile subscriber, i.e. their
access capabilities, subscribed services, and supplementary services. It also contains
information about the VLR that is handling the mobile station currently. When the mobile
changes location, the HLR is updated accordingly. It also provides the MSC with information
about the MSC area where the mobile is actually located to allow incoming calls to be routed
immediately to the called party.
Authentication Center, AUC
Stored information that is necessary to protect communication through the air interface against
any intrusions. The legitimacy of the subscriber is established through authentication and
ciphering, which protects the user information against unwanted disclosure.
Equipment Identity Register, EIR
An option the network operator can use to enforce security. With this feature the network can
identify defective or stolen mobile that may not be used in the network.
Subscriber Identity Module(SIM)
SIM is a smart card which has a computer and memory chip that is permanently installed in the
mobile equipment. It comes in either the size of a credit card or smaller version known as the
plug-in SIM.
The subscriber information, which includes a unique number called the International Mobile
Subscriber Identity (IMSI) is stored in the SIM card. SIM card identifies the subscriber to the
network.
FIGURE 1.3 INSERT SIM CARD
Figure 1.3 illustrates the steps for inserting the SIM card into the C35 series.
To protect the SIM card from improper use, a security feature, a four digits personal identification
number (PIN), is built in. The PIN is stored in the card and can be changed by the subscriber.
PIN2 is required for additional funtions available with a special SIM card (Consult the operator for
more information about the PIN.
A code (PUK) is provided for unlocking the SIM card if the SIM card is blocked
Change PIN Procedures.
CHART 1.1 PIN CONTROL
SIM Application Toolkit
SIM Applications Toolkit (SAT) allows the flexibility to update the SIM, to change the services
and download new services over the air. In the SAT specification, the short message service is a
key mechanism for personalizing the SIM in each user’s GSM phone. It is designed as a clientserver application. C35 series supports SAT Class 3 specification.
°
MENU
SETUP
SECURITY
CODES
CHANGE PIN CHANGE PIN2
{ENTER PIN NUMBER}
CHANGE
{ENTER NEW PIN} AND PRESS OK KEY.
{ENTER NEW PIN) AND PRESS OK KEY.
When active, the name of the service may appear in the menu, and there will be sub-menu if
more than one application is active. Figure 1.6 is the SAT icon.
FIGURE 1.4 SAT ICON
Extended GSM 900, E-GSM
This is a new standard that allows Network Operators to increase their capacity through an
extended frequency. The frequency range of E-GSM is as follows:
• Mobile Transmit: 880 – 915 MHz
• Mobile Receive: 925 – 960 MHz
C35 series is a GSM Phase 2 / Phase 2+ Dualband E-GSM / GSM 1800 mobile phone.
Built-in Modem.
C35i has an integrated modem for direct data communication using the data cable as shown in
Figure 1.5. C35 do not have the built-in soft modem for Data Service of GSM network.
FIGURE 1.5 DATA CABLE.
Data Application Support
Modem driver conforms to V.25 command set, and transmission speed conforms ITU-Tstandard of V.22bis. (2400, 4800,and 9600 bits/sec).
Facsimile conforms to Service Class 1, group 3 and operate at 2400, 4800, 7200 and 9600 bit/s.
Data services via GSM network up to 9600 bps, and remote control using cellular AT commands
for C35i only.
Internet access via the C35i is possible with the inclusion of Wireless Application Protocol (WAP)
browser 1.1 .
Level 2 Service Guide
Introduction
The chapter is intended to help you carry out repair up to Level 2 on the C35 series mobile
phone.
The repair for international version and Asian variants are identical unless otherwise noted,
therefore the description herein is confined to C35 only.
All repairs have to be carried out in an environment set up
according to ESD regulations defined in international standards.
ESD procedure is available from your Service Manager. Ask for
ASC/T001/98
Chapter
2
À
C35 & C35i Technical Information
System GSM Phase 2/Phase2+, Dual Band
EGSM 900, Class 4(2 Watt)
GSM 1800, Class 1(1 Watt)
Operating Voltage 3.6V
Size(LxWxH) 118 x 46 x 21 mm(without antenna)
Volume 88cm3 including battery (approx)
Weight 116g including battery (approx)
Battery(Standard) NiMH, 500mAH(Standard)
Li-Ion, 600mAH(Optional)
Standby time
1
50 to 180 hours (standard battery)
Talk time
1
90 to 300 minutes (standard battery)
Charging Time Up to 1.5 hours with Rapid Charger
SIM support Plug in card 1.8 V or 3V
Antenna Non - retractable, λ/2, helical fixed.
Speech codec Triple rate Enhance Full Rate
Full Rate
Half Rate
Display 101 x 54 pixel graphical display with up to 5 lines
12 x 12 font size for Chinese
Keypad 12 numeric keys(10 numeric, #, *)
4 function keys(Send, End-ON/OFF, Menu, Phonebook)
2 multifunctional softkeys
Key Sound Click/DTMF/None
Key Lock Activation and Deactivation by #-key or
Automatic.
1
Actual time dependent on the network.
Dialing 10 redial numbers,
Last 10 incoming with date/time stamp
Last 10 outgoing calls
Last 10 missed calls with date/time stamp
Ringer On/Beep/Off
Up to 22 melodies and 5 ringing volume settings
(Melody Composer, Crescendo Ringing)
Volume Adjustable in 4 levels during call via softkey
Silent Alert Built-in vibrator
Phone Book Storage depends on the SIM card capacity
Storage of up to 100 list in the phone (VIP)
SMS Support MT, MO, CB
Predictive Text Input, Tegic T9.
Supplementary Call Forwarding, Call Hold, Call Wait,
Services Multiparty Conference, CLIP, CLIR, AoCC
AoCI, FDN, LND USSD and SAT.
Ciphering A5/1 and A5/2 supported
PIN control PIN 1 & 2 Code Control
Phone code 4 to 8 digit code
Network function Automatic and manual network selection
Chipset Siemens E – GOLD
WAP Browser
1
Version 1.1
Other Features Clock / Alarm
Alarm List
2
Built-in modem
3
Calculator
4
Currency Converter
4 Games
7 User Profiles
1
Only for Model C35i.
2
Not available in C35 International version.
3
Not available in C35 International version.
4
Not available in C35 International version.
Accessories:
1. Standard Battery L36880-N4001-A100
2. Optional Battery L36880-N4001-A101
3. Standard Charger L36280-Z4-CXXX (Country Variant)
4. Travel Charger L36880-N4001-A103 (EU) / A104 (UK)
Similar to standard charger with an universal input voltage from 90 ~ 240V
4. Desk Top Charger L36880-N4001-A102
5. Belt Clip L36880-N4001-A113
6. Headset L36880-N4001-A123
7. Antenna Cradle L36880-N4001-A110
8. Car Charger Cable L36880-N4001-A108
9. Car Kit Portable
1
L36880-N3015-A117
10. Car Kit Comfort L36880-N4001-A111
11.Car Handset
2
L36880-N3015-A123
12. Designer Cases L36880-N4001-A119
13. Soft Data Link 3.0 L36880-N4001-A122 (Not for 3508i)
14.Data Cable
3
L36880-N3101-A102
15. Car Kit Professional Voice L36880-N4001-A124
16.Data Cable Professional
4
L36880-N3101-A112
1
Same as C25(88)
2
Same as C25(88)
3
Same as C25(88)
4
Same as C25(88)
General Information
Due to different requirements of the markets, the C35 series has different variants, which broadly
classified under International version and Asian version. Marketing name for international version
is C35 or C35i, whereas Asian version is named 3508 or 3508i.
The 3508 series is equipped with a graphic display which enable the telephone to display
CHINESE characters, either in Traditional font or Simplified font, beside the standard English.
Difference between C35(08) and C35(08)i
C35(08)i mobile software has WAP Browser 1.1 incorporated thus enabling user to surf the
Internet and it have built-in soft modem for GSM Data Service.
The differences between the C35 and C35i are the hardware and software. The memory size of
C35 is 16MB and that of C35I is 32MB.
There are also two variants for 3508, one without the WAP browser is 3508 and that with WAP
browser version 1.1 is 3508i. The different for ASIAN version is only mobile software.
Wireless Application Protocol, WAP.
Wireless Application Protocol takes a client-server approach that uses the in-built micro-browser
to make a request, in wireless markup language (WML), for information or service. The request
is passed to a WAP Gateway which then retrieves the information from a Internet server, in
HTML format, and translate it into WML. The requested information is then sent to from the WAP
Gateway to WAP client (mobile) using the available and most appropriate mobile network bearer
services.
Wireless Protocol Stack.
Wireless Application Environment (WAE)
Wireless Session Protocol (WSP)
Wireless Transaction Protocol (WTP)
Wireless Transport Layer Security (WTLS)
Wireless Datagram Protocol (WDP)
Bearers e.g. Data, SMS, USSD
TABLE 1..1 WAP PROTOCOL STACK
1. Wireless Application Environment
Defines the user interface on the phone. WAE contains the WML,WML script and the
wireless telephony application (WTA).
2. Wirelss Session Protocol
Link the WAE to two session services – one connection oriented operating above the WTP
and a connectionless service operating above WDP.
3. Wireless Transaction Protocol
Runs on top of the datagram service and part of the standard suite of TCP/IP protocols, to
provide a simplified protocol suitable for low bandwidth mobile station.
4. Wireless Transport Layer Security
WTLS incorporates security features that are based upon the established Transport layer
Security (TLS) protocol standard, that include data integrity checks, privacy on the WAP
Gateway to client leg and authentication.
5. Wireless Datagram Protocol
Allows WAP to be bearer independent by adapting the transport layer of the under-laying
bearer. WDP presents a consistent data format to the higher layer on the WAP stack.
C35 Series Mechanical Diagram
FIGURE 2.1 C35 MECHANICAL DIAGRAM.
Please take note that the number(s) used here IS NOT the part
number, DO NOT used it in your spare parts purchase order.
A l w a y s r e f e r t o th e S E R V I C E P A R T P R IC E L I S T
f o r y ou r s pa r e p a r t o r d e r .
Mechanical Concept
Note: All numbers refer to mechanical drawing in Figure 2.1.
The mechanical concept of the C35 differs in various points from the one of the other Siemens
mobile telephones.
The first thing you will experience is how the housing is locked. In C35 no screws are used to
keep the housing closed. Also inside the telephone no screws are used anymore. To open the
housing, which is kept closed by catches only, a special opening tool has been defined. For
details on disassembly tool please refer to Photo 2.3 in this chapter.
Inside, the C35 consists of just one board (1010) which carries display module(1170), control
part and RF section of the mobile.
The display module (1170) is connected to the board by a flexible cable which is inserted into a
plug. In case the display is defective electrically or mechanically it can be exchanged very easily.
C35 does have an external connector of a new type. Since S6 a so called “Molex”-connector
was used, which also offered the possibility to connect an external antenna to it. The new
“Lumberg”-connector which is used in C35 does not feature such a connection, because the
connector for external antenna is located at the back side of the upper end of the mobile, close
to the internal antenna (1130). As a consequence of this there is no need anymore for a RF
cable mounted to the board nor for a RF plug on it to connect this cable. This improves RFproperties of the mobile and lowers production costs.
To be able to do measurements on and software update of the telephone, an adapter cable
between Molex and Lumberg connector will be available. See photos in Additional Tools of
Chapter 3.
C35 series antenna is of a snap-in type which inserted into the lower case shell (1030). The
antenna can only be changed by opening up the C35 phone.
The C35 is a dual-band mobile operating on GSM900 and
GSM1800, the antenna is an integral part of the lower housing.
The keypad (1150), the microphone (1110) and the loudspeaker (1120) are mounted into the
upper case shell (1020). Make sure that the microphone and the earphone contact springs are
not dirty or damaged during repair process.
The dust protection frame and the display window are included in the display module(1170).
Hardware Concept – Block Diagram
FIGURE 2.2 C35 BLOCK DIAGRAM.
Hardware Description
The handset consists of the following major integrated circuits:
1) E-GOLD – PMB2851E
This IC is a combination of microprocessor, signal processor and real-time clock.
The microprocessor part of this component is responsible for controlling the keyboard, SIMCard, Flash and RAM. Furthermore it controls the power saving, power up/power down of the
RF module and sets the amplification of the PA.
The signal processor part of PMB 2851E is responsible for processing the Rx I/Q signals
(filtering, equalizing, speech and channel decoding).
Furthermore it does the speech and channel encoding and the GSMK modulation of the Tx
I/Q signals. The Voice CODEC part is used to realize advanced features regarding coding of
the speech signal. These are:
• Halfrate-Encoding
• Halfrate-Decoding
• Enhanced Fullrate Encoding
• Enhanced Fullrate Decoding
• Voice Activity Detection
• Comfort Noise
2) GAIM – PMB2906
The GAIM (GAIM = GSM Analog Interfacing Module) provides the interface between the
analogue and its digital representation signals (Base-band I/Q, Voice-band, PA-control,
Voltage & Temperature Measurement - Charging control).
3) 13Mhz Ref Oscillator Circuit -
This circuit provides the following main functions:
• Generate 13Mhz clock signal for Logic Circuits – SIN13M.
• Generate 13Mhz reference signal for the PLL circuits for the Tx & Rx of GSM RF signal.
• Received the frequency steering control AFC_PNM from the HiGOLD IC for fine tuning
of the Tx & Rx frequency.
• Temperature dependent resistor sited near the 13MHz oscillator measure the
environment temperature.
4) Power Supply ASIC – D0767BA
This circuit provides the following main functions:
• Control of switch on of the Mobile phone by ON/OFF button, Ext Power (Charger) or real
time clock.
• Watchdog monitor – switch off the mobile phone if no proper Watchdog signal send from
HiGOLD IC.
• Voltage supply to the logic circuits – 2.90V, 2.65V & 1.92V, Simcard & real time clock in
HiGOLD IC.
• Switch on the linear regulator to supply the 2.8V for the13Mhz Oscillator circuit.
• RESET signal for the logic circuit.
• Charge control signal for switching the charge FET.
• Low battery detector.
• Over voltage protection.
5) Receiver Circuit – Bright II HD155124F
This circuit provides the following main functions:
• Low Noise Amplifier (LNA) with a fixed amplification of +20dB to amplify the input RF
signal.
• Mixer to mix down the RF signal to the Intermediate Frequency (IF)
• Programmable IF amplifier with a dynamic range of 60dB ( -10dB ~+50dB in steps of
2dB).
• Mixer to mix down the IF signal to the baseband, generating and inphase (I) and a
quadrature (Q) signal and feed the GAIM IC base-band signal, RX I/Q for the decoding
of the digital signal for the HiGOLD IC.
6) Transmitter Circuit – Bright II HD155124F
The GAIM IC generate the MOD I/Q base-band signal under the control of the HiGOLD IC
and feed the IQ modulator of the Bright II IC. The Bright II IC provides the IF synthesizer,
the I/Q modulator, prescaler to regulate the dual-band TX-VCO and feed the modulated GSM
signal to the PA.
The telephone support only 1.8V and 3V SIM card
For user with 5V SIM card, he need to upgrade the SIM card
through his service provider/network operator
Power Supply Concept
The C35 has two main power inputs:
1. Battery voltage(3.6V) connected at the battery contact
2. Charging voltage(6.5V) delivered by the different charger type(see Accessory List) via the
Lumberg connector at the bottom of the telephone.
Since the battery voltage is supplying the power supply ASIC, it is always needed to operate the
phone. You cannot switch on the handset if the battery voltage is not present.
From the battery voltage, all other supply voltages are derived and controlled by the power
supply ASIC.
The RF power amplifier is directly connect to the battery, a bad battery with high internal
resistance can cause malfunction of the C35 phone.
The Logic module uses 1.92V, 2.65V & 2.9V generated by voltage regulators inside the ASIC.
Furthermore, the ASIC generates the supply voltage for the SIM card and the RESET signal for
the logic devices.
The ASIC also checks the presence of the watchdog signal from the microprocessor and
provides the switching on functionality (ON_OFF button or Ignition signal).
Wrong polarity or battery voltage setting that exceed the +6.5V
could damage the phone.
Over-voltage Condition
• Battery voltage
If the supply voltage rises above 6.2V, the phone will switch off and it cannot be switched on
again before the voltage is lower than 6.2V.
If the supply voltage rises above 7V, the phone can be damaged
• Charging Current
The charging current must not rise above 1A or a track fuse in the
phone will blow. As a result charging the battery will no longer by
possible.
Be careful with NON-original SIEMENS accessories or chargers.
Make sure that the charging current is limited to value below 1A.
Battery
C35 series uses a Nickel Metal Hyride (NiMH) 500mAH battery pack as standard battery. It also
support the Lithium Ion 600mAH battery pack (For S35i phone) as optional battery for customer
want longer talk time.
PHOTO 2.32 C35 SERIES INSERTING BATTERY.
For C35, BATT+ has a voltage level from +3.0V to 5.5V, and a BATT_TEMP contact is used for
detecting abnormal increase in temperature of the battery.
If the temperature is too high or too low, there is a high probability
that the battery is not charged. To enable the charging process
again, battery and phone needs to cools down or warm up. Battery
replacement is not required.
A v o i d s h o r t i n g t h e b a t t e r y t e r m i n a l s .
Short Circuit Protection
For the Nickel Metal Hydride battery, a polyswitch in the battery pack protecting the battery from
short circuit and it should reset by itself after some time removing the short circuit.
For the Lithium Ion battery, it is short-circuit protected by an electronics fuse. The fuse will be
activated in case a too high current is drawn. This fuse will not reset automatically.
The resetting of the L-ion battery fuse can be done with either of the following procedures:
1. Insert the battery into the C35 and then connect the rapid charger to the phone. Wait for
approximately 10 second, then the mobile can be turned on again.
2. Plug the battery separately into the desktop charger. The fuse is reset immediately.
3. Insert the battery into the C35 and put the phone into the desktop charger. Wait for
approximately 10 second, then the mobile can be switched on.
Charging
The battery can be charged when it is inserted into the phone. The charging process is
completely controlled by the mobile. Charging can be done with any of the following accessory:
1. Rapid charger
2. Travel charger
3. Car charger
4. Desktop charger
PHOTO 2.33 INSERT CHARGER
Photo 2.33 shows the correct way of inserting and removing the charger plug.
Deep Discharge Battery
In case of a deeply discharged battery, the voltage of the battery is too low to operate the
charging circuit and the display controller, the phone can not be turned on and the normal
charging process can not be started. No charging symbol is visible in the display.
In this case, charging the battery is divided into two different steps, which have to be run
subsequently:
a) Trickle charge for C35 Phone
Trickle charge mode is automatically started if the battery voltage is below 3.0V when the
charger is connected to the mobile. The charging current in Trickle mode is appr. 10mA.
Trickle charge mode has to last minimum until the battery voltage has exceeded 3.2V,
then the phone will switch on and the charging icon appear. During trickle charge the
charging symbol will not be visible and the telephone can not be turned on. This is
because the battery voltage is too low to operate the telephone.
Action:
Insert battery into handset and connect travel charger to the telephone. If within 4 hours
the battery voltage is high enough again, the charging symbol will come up.
If the battery is discharged very deeply, the symbol may not come up and the trickle
charge time possibly has to be extended up to 24 hours.
b) Normal charge
When the battery voltage is above the a.m. value (e.g. by trickle charge) the mobile will
start the normal charging mode and show a charging symbol in the display. * Always
normal charge a new battery or a deep discharged battery for more then 12 hours before
first use.
Action:
Connect charger to the telephone (see section on Charging).
The charging symbol will come up as an indication that the normal charging process has
been started by the mobile.
Mobile Phone C35 Spare Parts Level 2
SIM Card Reader
with
Card Holder
L36334-Z97-C111
SIM Card Holder
L36334-Z97-C112
Display module
L36851-Z1508-A51
Keypad
L36158-A33-B75
Microphone
L36254-Z6-C82
Upper Case Shell
L36158-A33-B....
Antenna
L36158-A33-B161
Vibra-Alert Unit
L36453-Z5-C77
Battery Contact
Spring
L36334-Z97-C113
RF Control Board
L36880-Q4050-B201
Buzzer Sealing
L36158-A33-C260
Display Cover
L36851-A33-C101
Display Sealing
L36158-A33-C103
Earphone
L36212-Z3-C34
Battery Cover
L36158-A33-B....
Battery NI-MH
L36145-K1310-X125
Lower Case Shell
L36880-A33-B....
L36158-A33-B....see Spare Part
Disassemble the C35
A case opener is needed to disengage the latch of the C35 casing.
PHOTO 2.3 C35 CASE OPENER
The part number for this mandatory tool is F30032-P46-A1
Refer to ANNEX B of Chapter 3 for Service Equipment List.
STEP 1:
Remove the battery cover then the battery as shown in PHOTO 2.4
PHOTO 2.4 DISASSEMBLE C35 – STEP 1
STEP 2:
Open the housing with the opening tool and carefully pull the lower housing section off as
illustrated in PHOTO 2.5
PHOTO 2.5 DISASSEMBLE C35 – STEP 4
STEP 3:
Use the Case Opener carefully disengaged the catches of the Lower housing and Upper
housing to separate the housing and the Control Board Assembly as in PHOTO 2.6
PHOTO 2.6 DISASSEMBLE C35 – STEP 3
Disassemble/Assemble of the Lower Housing Assembly
STEP 1:
Open the housing with the opening tool and carefully pull the lower housing section off as
illustrated in PHOTO 2.7
PHOTO 2.7 Lower Housing Assy – STEP 1
STEP 2:
Remove in sequence by hand the SIM Card Holder, SIM Card Reader, Battery Contact Spring,
Vibra-Alert Unit and the Antenna as illustrated in PHOTO 2.8
PHOTO 2.8 Disassembly Lower Housing – STEP 2
For Remove/Install the Antenna, watch out for the two catches on the Lower Housing. For install
of the other parts, watch out for the guide notches. For the assembly of the Lower Housing just
reverse the sequence for the disassembly.
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