COMMON PROBLEMS OF MOBILE CELL PHONES AND THEIR REPAIR (4)

COMMON PROBLEMS OF MOBILE CELL PHONES AND THEIR REPAIR (CONT.) (4)

MOBILE CELL PHONE SIM CARD PROBLEMS AND REPAIR.
The SIM Card (Subscribers' Identification Module) is the small card inside your mobile cell phone that establish the network connection. When SIM card error occurs,the mobile cell phone may display information such as:
(1) "SIM card error"
(2)"SIM Card rejected."
(3)"Insert SIM Card"
(4)"SIM Card unacceptable"
(5)"SIM Card invalid"
SIM Card error could occur due to one or more of the following problems.
(1) SIM Card out of alignment as a result of mobile cell phone drop or recently opened. Open the cell phone and adjust. Follow the installation instructions in the user manual.
(2) Trying to use a different SIM card for a mobile cell phone configured to use a particular SIM card could result in SIM card rejection. You either make use of the appropriate SIM card or unlock the mobile cell phone with a smart unlocking software before you can make use of another network provider's SIM card.
(3) Errors resulting from mobile cell phone malfunctionig: These include:
(a) Dirty SIM card. Clean.
(b) Dirty SIM card reader. Clean.
(c) Faulty SIM card reader.Repair.
(d)SIM Card damage. Repair/Replace
(e)Multiple PUK code entry.
(f)Other mobile cell phone problems. Repair.
The SIM card is a property of your operator or network provider.In most cases, your service provider is therefore the best source of assistance with SIM card problems.

MOBILE CELL PHONE SECURITY CODE PROBLEM AND REPAIR.
Your mobile cell phone could request for security code. There are basically two forms of security codes. The first is the default security code placed by the manufacturer of the mobile cell phone.It is usually given in the user manual and the mobile cell phone user is advised to change it for phone security.For example,Nokia default security code is 1,2,3,4,5. while that for Motorola is 1,2,3,4. When the default security code is changed, you have the other type of security code.This code is only known to the person who made the change.When the mobile cell phone request for security code, this number is supplied otherwise a smart software is required to unlock the mobile cell phone if forgotten or not known.
MOBILE CELL PHONE PIN /PUK CODES' PROBLEM AND REPAIR.
The PIN and PUK (Pin unblocking code) codes are inbuilt into the SIM card for security. The defaul PIN and PUK codes are supplied by the operator. It is advised to change the PIN code. (PUK Codes can not be changed.)When the PIN code is requested and supplied wrongly multiple times,the SIM card is blocked and the PUK code is requested.Supplying the PUK code wrongly several times may result to permanent de-activation of the SIM card. For assistance on SIM and PUK codes, contact the service provider.

MOBILE CELL PHONE DISPLAY "CHARGER NOT SUPPORTED"
Diconnect and reconnect the charger.Make sure that you use the approved/recommended charger for the mobile cell phone in question.

MOBILE CELL PHONE CALL DROP PROBLEM AND REPAIR
This commonly result from low or momentary lose of signal from either ends. This problem may be ammeliorated by moving to a better position of reception preferably near a window if you are in a building.

MOBILE CELL PHONE '' TOO LONG '' CHARGING PROBLEM
Note that full charging time differ from phone model to model. Charger time also depend on the type of charger used. Some charger are faster than others depending on maximum current output of the charging device..

MOBILE CELL PHONE HEAT UP DURING USE AND REPAIR.
Most electronic devices do heat up during use. However,excessive/abnormal heat up may require a software upgrade.

MOBILE CELL PHONE MESSAGING PROBLEM AND REPAIR.
Note that when your inbox is full, you may not be able to recieve new messages. Sending of messages may also not be possible if such folders like 'sent items' are full. Delete some. Wrong message center number is also a common cause of sending/recieving messages

THE REPAIR OF "CAMERA, RADIO,TV,GUN?, COMPUTER, PDA ETC" INBUILT INTO CELL PHONES.
It is better to leave these area to a trained mobile cell phone repair engineer. However, if you must make an attempt, dry cleanning and possibly re- solding of components to PCB appears to be all you can do if you do not have a manual guide.

Godak.