trouble while inserting sim

[dileesh]

when i switch on my xperia l with sim it automayically turns off and then on after few second.it repeats. i changed the sim but problem exist. but without sim phone is working properly. please help me to fix the issue

[Uliwooly]

@dileesh

Try with a brand new SIM card, make sure that its the correct size and not a trimmed/cut SIM card. 

[dileesh]

i tried with 2 other sim cards. but problem continues. but in flight mode with sim phone works properly.what to do

[Uliwooly]

@dileesh

Repair the phone with PCC and report back

software repair

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355