I've been using my Z1 for the last three days and since yesterday the phone is rebooting like crazy. Apart from this very disappointing issue; I've been having other problems, too that I thin may be related:
1. From time to time the phone behaved as if it is turned off. No incoming calls accepted, no incoming SMS delivered.
2. Although Data Traffic is enabled, sometimes 3G is not activated after turning of Wi-Fi. Had to restart to get it back on.
3. Finally the messy reboot problem: After a reboot, the phone turns on, displays SONY/XPERIA and the animation and after some time the home screen comes up; but with a completely black background. All widgets and shortcuts/applications are intact, can be clicked and navigated, and everything just seems to work. But this only lasts for about 15-20 seconds. Then the phone reboots and the cycle continues. If I let this to go on and if I get lucky, the phone sometimes boots normally after many tries. I can use it normally for some time and all of a sudden I see the phone is not accepting incoming calls and there is no 3G and I reboot and we are back to the same reboot cycle.
I have used the Software Update Service, updated to the latest firmware version 14.1.G.2.257 and reverted back to the factory settings. I removed the SIM card and also the SD card; updated/repaired using SUS again but after the update only the first power up is normal; event without any SIM or SD and pure factory setting the reboot issue still comes back.
I have no other ideas about what else to do or try and got it back for service after just three days. Very disappointing indeed for such a high class premium phone!
