My Solution

Plug in Charging pin into charging jack of Nokia C2-07 and if it shows an indication message Charger Not Supported it can be due to these few parts that are given bellow in diagram.So after disassemble of Nokia C2-07 clean these parts and area with electronics cleaner.



Apply hot air and make it dry.Resold these parts indicated with red lines in above diagram to solve Charger Not Supported in Nokia C2-07
You can take these parts from other models of nokia also to solve charging problem in nokia C2-07
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Heres the solution for Nokia E73 with charger not supported problem.This kind of charging problem only shows "charger not supported" on the LCD screen display when the USB charger is being plug-in.

The solution below shows a certain components that needs to be replace if this kind of problem occurred on Nokia E73. There is thermal resistor which has a resistance value of 47K. If these resistor become faulty or already damaged it will result to charger not supported problem on the device.
The 47K BTEMP (battery temperature) resistor is located or mounted near the keypad pin connector just the bottom of the Nokia E73 PCB board. You must replace it with same value or type or it will not fix the problem.

Heres a solution for Nokia X3 Not charging problem like it shows no response or indication on the display when a working battery charger is being plug-in.

If encountered charging problem on nokia X3, you may need to check the DC jack or charging pin and ensure that is perfectly cleaned, not misaligned and with properly in-tacked on the PCB contact pads.
If the charging pin assembly is perfectly fine but still it shows no indication of charging operation,
the solution below shows the components on Nokia X3 PCB board that may need to check and or replace if a charging problem occurred.


The solution above shows the components such as chip fuse, diode, filter coil and capacitor which holds as a charging protection circuit. These components will breakdown or being damaged if a short circuit happened on Nokia X3 PCB board. You may need to check and replace these components if found damaged and fix nokia x3 not charging problem.