Share your experience!
Good afternoon. I have Sony Xperia M C1905. Yesterday officially the insertion to the version (15.1.C.1.17) was "by air" updated. Now the sound of a call became silent and the most important - the Internet doesn't work. 1) In what problem? ? 2) How to return the old version of system? Your new insertion with such problems doesn't SUIT me!
Try to download new Internet settings from settings > Xperia > Internet settings. Restart the phone and try again. Make sure that you have mobile data enabled under settings > more > mobile network.
If the problem still persists, I would recommend that you try to reinstall/repair the phone software using PC Companion:
http://www.sonymobile.com/update
In PC Companion, press start on Support Zone > Start on Update the phones software > "Repair phone".