Share your experience!
i've had my Xperia T since november now it was perfectly fine and stable unitl the 4.3 update, at first i done the update it worked for the next 2 days then it kept popping up with a message saying SIM/UIM card inserted restarting when i clearly hadn't touch anything around that area and the sim card was in, i have had nothing but problems since the 4.3 update that i had to have it sent off as it was stuck on the restarting process and today(18/04/2014) my phone kept displaying this message and even during phone calls so i left my phone in my pocket and the next thing you know the battery is on 16% yet i had just checked it and t was on 84%, and now it is stuck on the restart screen again, to say the 'support' is abismal is an under statement i havent even had it a week back from repairt and it is mucked up again, i'm getting so frustrated with this and paying £25 a month for something i have barely used for the past two months is beyond a joke, i just want a new phone already and on a two year contract this is really winding me up, once i'm done with this contarct i will never toucha sony phone ever again i had the samsung galaxy s2 befor this and i had that sent off once the problem was fixed the first time and sorted no issues all i can say is that sony have no idea what there doing appart from annoying their customers and loosing them aswell. fed up off this i just want a new Xperia T and none of this fuss but no i have to send it off all the time.
I am sorry for your problems,you should contact xperia care:
http://www.sonymobile.com/global-en/support/contact-us/