sir my mobile Sony xpiera e3dual automatically switch off and again on And second problem speaker my song always brack some time so please help me, what are doing me
I'd suggest that you backup your phone then do a software repair using Xperia Companion. This will do a clean installation of the latest firmware and will also wipe your internal memory, thus fixing various software-related issues. Follow the steps given in the blue link, do not connect your phone until prompted to press volume down while plugging USB cable.
