Xperia XZ Rebooting automatically

[Pencil_]

I have an issue about rebooting automatically. Even if while not using phone, my xperia xz reboots him. Also, i tried to repair my phone via companion and hardformat too. My problem continues. Moreover, I gave the phone to service 2 times and they said there was no problem (or they wasn't able to find it). The problem still continues although i sent it repair 2 times :(. Help me for fixing this problem please.

Thank You

[qzzy]

Hello all,

I have received the phone from service and they changed the motherboard of phone. I havent tested the phone yet but once I do, I will let you know. And on top of that, its amazing that you pay full price for brand new phone and you get more like a refurbished phone for full price. Im slightly disappointed in terms of that. Anyhow, have a nice day people

Warm Regards,

Ozan