LT30p automatically reboots

[shom]

Hello Sony

Yesterday i installed the 4.3 update from Sony. Today my Phone reboots about 4 times an hour. Saying sim/uim  and sim/uim inserted. .

Factory reset don`t work! (approximately one day work then start rebooting every 5 minutes)

PC Companion repair don`t work! (approximately work one day  then start rebooting every 5 minutes)

Seus don`t work! (approximately one day work then start rebooting every 5 minutes)

Tried it by pulling it out and putting it back several times! (approximately work 2-3-4 hour and then again....)

and sometimes phone lost gsm network, but it happen relatively rare

Is there someone Who can help me?

[_alexdon_ · Accepted solution]

In this case,I suggest you either try a new SIM,just for the record.If that does not help,visit a sony service:

http://www.sonymobile.com/global-en/support/contact-us/

[shom]

Thank u Alexdon, I will try change sim but I doubt it because problem start from update 4.3 and i can not find solution in web, meny people have this problem after update 4.3 and they can not slove this problem, i think downgrade will work but i don`t want root phone, I did not expect such problems with sony. 

Thanks Alex!

P.S I think there is not sony service center  In my country : )

[_alexdon_]

You can downgrade without rooting:

http://talk.sonymobile.com/t5/Xperia-S-SL-acro-S/How-to-manually-update-root-downgrade-2012-Xperias/...

But it could be best that you wait for the next update.

[Thommo]

For downgrading I recommend this tutorial which also has a list of firmware's you can download

All you need to do is sign up select the firmware and click on it - On that page will be a download link for the firmware along with full and clear instruction with download links to Flashtools which is need to flash and or downgrade

[rcrdofjrdo]

I will try this as well. Have the same problem, which is a shame as the update is brilliant. By the way, I tried changing the sim to a new one and made no difference

[Motaleb]

Sony Xperia T (LT30p) auto restart again &again

[0xdb]

I have the same issue - unexpected  my phone reboots apr. 3-4 times with the massage "sim/uim card inserted, restarting" 

[_alexdon_]

If you let the SIM out,how is it?

[0xdb]

without sim card it looks ok, but this issue happens relatively rare and totally unpredictable. i can't test it so long