Share your experience!
my phone hangs suddenly and doesnt respond at all to anything..nd also sometimes restarts automaticaly..its jst 3 days before i have purchased dis phone..plzzz help..
Check if you have certain apps installed such as: Battery saver-app, Task manager, Task killer-app, Anti-Virus-app.
Uninstall those apps and see if the problem is solved
If problem persists I recommend you to repair the phone software via Sony PC Companion:
Click on this link to get Sony PC companion:
http://www.sonymobile.com/gb/tools/pc-companion/
Start PC companion, start "Support Zone", start "Update phone software" and click on "Repair".
Follow the on-screen instructions.
My newly bought Xperia L also had similar problem... when in idle, it hanged. I did a full factory reset and the problem was solved.
But I'm already did full factory reset and repair software, even after I repair my C2105, the problem got much worse....