Hi all, i also bought the same xperia L C2104 around 2 months back but yes from the day 3rd or 4th it was restarting itself more than 5 times a day, mostly its got turn off when receiving a call even its got hang too after it goes off. Done factory reset settings, uninstalled all external software but problem is still there. When i called to register my complaint at xperia customer care on its toll free number but it was not working and call got disconnected itself about 5 times. Please help me to resolve the problem. My number is 9650496180
