Insert Sim Problem Jumpers,Sim not working, Invalid Sim.
Tools:-
Extra Sim Card for diagnostic.
Nokia Key T4 and T5 for disassemble.
Electronics Cleaner for cleaning carbon or water damages.
Hot air to dry the mother board.
Solding Iron for applying jumpers.
Solution & Diagnostics:-
Try to solve the problem with inserting new Sim Card and check. If it is working problem can be solve with Sim Card changes only.
If the above step do not solve Insert Sim card problem then disassemble the mobile phone and look at the mother board.
If there is some rust or carbon then apply electronics cleaner and clean it.
Apply hot air to make it dry and test again.
Different color lines are given to indicate whole track and paths of insert sim card function in Nokia 100.
Check all points that are described in above diagram and if any track out of them is missing apply jumpers as shown in above diagram for solving insert sim card problem in Nokia 100.
You may have to change Sim ic that is near by the Sim jack.
Warnings & Tips:-
Do not apply much heat with hot air it can be harm for your skin.
Apply jumpers carefully so that it would not be short with other.
After cleaning with cleaner make it dry proper.
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