1 number sim suddenly

[Amar-deep]

1number sim Is not showing signal not even network mark in my tipo dual only 2 number sim is working help me,, sorry for bad English

[_alexdon_]

Try to set the first SIM on WCDMA and the second on GSM only.

[Amar-deep]

It's not helping, how to reboot or reset the phone tipo dual, give me some idea please

[_alexdon_]

You could try a repair with SUS:

http://www.sonymobile.com/gb/tools/update-service/