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2013-06-20 02:52 PM
Updated my Xperia P recently to JB.Was Working fine for a day or two then suddenly the phone shut down automatically.Sent it to Service Center n got the software updated .Still the phone shuts down as soon as I insert a Sim card.The service center guy asked me to change my Sim card.I did it but the problem persists....It runs perfectly well without a Sim?What to do ...????
2013-06-20 05:27 PM
If the sim card moves from its place,the phone restarts automatically.Maybe the sim card does not make perfect contact,so it moves and makes the phone restart.Take the phone back to them and tell them to have a look at the sim card place.
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2013-07-22 05:49 PM
I am experiencing this exact behaviour on an Xperia P. The sim card is making good contact as I am able to get the PIN request. It shuts down after entering the PIN, when connecting to the mobile network, leading me to think it has something to do with the radio and nothing to do with the SIM card holder.
2013-08-28 05:04 PM
I had the same problem too.This worked for me:
1.Open your phone without sim
2a(Ice cream Sandwich):Then Go to the settings->more->mobile networks->Network mode or 2b(Gingerbread) Settings>Wireless and networks>Mobile networks>Network Mode
3:And change network mode to WCDMA only(this worked for me).
4:Insert your Sim and restart your phone
If "WCDMA only" doesn't work you can try "GSM" only.
Old thread but I hope someone else gets helped by this.
2013-09-01 05:24 PM
finally got a solution for JB 4.2.1 :
1.remove sim and start the phone
2.open android system settings by dialing *#*#4636#*#* code in phone dial up.
3.open phone information and select wdcma only.
4.insert sim and let phone restart and **bleep** soon **bleep** it starts switch to airplane mode before it switches off.
5.repeat step two ,now the settings there will be automatically on 'unknown'.go to mobile network and select ur sim card network the phone signal will re-appear.
worked for me aftr phn sw off fr 2 weeks.hope it works for u too...............
2013-10-25 02:20 AM
May i know why this is happening ? it happened even for me also am from India and then I followed the procedure you mentioned now its working fine.
2013-10-25 02:22 AM
I have one more point, I fear that if i switch of my phone and start it again will this problem persist ? will my phone get switched off again after inserting SIM ?
2013-10-28 05:32 AM
@Deepankar - In your case if the above steps have resolved the issue it is unlikely that this would occur again.
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