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Hi Guys!

Accidentally format /system throw ClockworkMod recovery,
and sim is not working anymore
IMEI is ok, baseband version is the same, what is problem?
I had tried different firmware with no effect.

Please help!

Possibly need to restore NVRAM. I assume you have your NVRAM backup or full MTK Droid Tool backup?

If you have not, you have to flash the stock ROM with "SP Flash Tool", not with CWM.
This will restore the NVRAM files.