Phone shut down and restarts

[dandedoes]

Why zo my z3 suddenly shut down and then restarts? I have experienced it several times at about 4-5 o'clock in the night. very disturbing!

[ClaytonLeRoux]

I have had the same issue, except that mine has gotten so bad now that the phone won't even switch on, just constantly reboots. And if the phone miraculaously boots up, I just get error message after error message. Never had this when I had Samsung. Really wish I could return this phone. I have tried everything, hard reboot, safe mode, repair....... nothing works. I am ready to smash this thing into a million pieces!!!!!!

[dandedoes]

I understand you so well. I have now repaired the phone with Sony Bridge and for the 2nd time I have to find, download and reinstall a lot of apps, and configure several settings that are not included in the backup. It takes hours...
I have tried to sell the phone but 2nd hand prices are allready very low so I must say Sony Z3 is/was a very poor investment and I can only recommend other to buy iPhone...