Xperia Z3+ randomly reboots

[qw111]

My Z3+ randomly reboots multiple times/day(30+). I've tried restoring with PC Companion, hard reset, factory reset, safe mode, everything. I tried running diagnostics but it's a crapshoot. Sometimes I will get a neverending loading loop and sometimes I'll get a error message, "Unfortunately Diagnostics has stopped." and then the phone will reboot iself.

[komilAD]

@qw111

May be your sim card or SD card is gone loose. Try removing both and use your phone for a while and check whether problem persists.

[qw111]

Thanks for replying. I've tried this already without a SIM card or SD card in the phone after a repair over PC Companion. It reboots itself about 15-20 minutes after I go through the initial setup.

[komilAD]

If you have tried all the troubleshooting and still no luck finding solution then in that case you need to go to local Xperia care centre and have your device inspected.

[qw111]

I live in the United States and I spoke to someone at Sony Care. He told me that the Z3+ isn't supported in the USA and the repair facility isn't trained with the Z3+.

[komilAD]

@qw111

I am sory I don't live in USA so don't know what regulations you need to follows. So may be you can ask for a refund or a replacement from the place of purchase. 

[qw111]

I wish I could return it. The vendor I bought this from will only accept a return for hardware issues and this is clearly a software issue.

[komilAD]

@qw111

Well If you think that the problem is related to your phone's software then how about flashing another region's firmware and check if it helps a bit? See this guide

What kind of service centre doesn't accept the phone for repair which is being sold in the same country?   

[qw111]

Sorry. I've tried that and my phone still reboots out of the blue. I even switched to UK and the new USA firmware. Same problem.

I went to the new Z5/Z5C forum and it looks like some of the users with the newest phone are experiencing the same issues.

[qw111]

I ran a repair over PCC for giggles and this is what diagnostics says after 3 days. There's 0 dropped calls so I got that going for me.

As I type this my phone is going through a random reboot so there's actually 115 System Incidents.