Solution: How to Fix Sony Ericsson Xperia X10 Insert Sim Card Problem

If the Sony Ericsson Xperia X10 unable to detect, read or if the phone does not recognize the SIM card. It could be the SIM card that is damaged or it could be a phone problem?
Here's the solution on how to fix the problem.... 

Try to insert a different SIM card on the phone and check if this works. If it does not work,  visually check the SIM card connector for possible damaged or clean it if necessary.
Try to repair the device firmware using PC Companion. If it still does not work, the problem may possibly on the phone's hardware components.

The solution below shows the connection line paths and components that holds of the Xperia X10 SIM card circuit. This may help in troubleshooting sim card problem issues.

On Sony Ericsson Xperia X10 the Sim card connector or slot is mounted on flex board assembly together with the microSD memory card holder. If the said flex is damaged it may result to "sim card and memory card not recognized problem". The the whole Sim card flex board is replaceable and it's not hard enough to find or purchase a replacement for it. 

You must check the Sim card flex board assembly first and ensure it has a good and in proper connection between the PIN connector on the PCB board.  Then replace it if found damaged. If the SIM Card flex seems still okay, refer to the solution below and then trace the corresponding SIM card pins connection line paths like: VSIM or VUIM, RESET, CLOCK, DATA and GROUND connections.

Check the SIM card flex pin connector solder status, resolder or replace if damaged.  Check each of the filter coils connected to it. Re-solder or replace if damaged. The VSIM can be read around 1.8V to 3V when the SIM card is inserted to the device. Lack of VSIM voltage or if it is missing is cause by a faulty power management IC. That's it, good luck!

Posted in: Sony Ericsson,Sony Ericsson Xperia X10