Last Xperia

[Havaree]

After years, from a Sony Ericsson to the Xperia XZ, I've decided it's my last Sony. The XZ was a disappointment. 80% of the time I can't use the camera because the phone is overheating. Internet connection is slow. Sorry it was a nice journey with Sony, but it's time to say goodbye. 

[najodleglejszy]

that doesn't sound right, mine isn't overheating at all. have you tried booting into safe mode and checking if the phone is still overheating when using the camera? /t5/FAQ/How-to-boot-your-phone-into-safe-mode/td-p/348008

[Species8472]

Something is definitely wrong if your XZP overheats when using the camera. In my experience, XZP is seem to be very cool device at any situation. Yesterday i was using SloMo camera at least 15-20 min continuosly, without significant heat.

[Havaree]

He is also overheating when i'm on the internet. 

[najodleglejszy]

again, have you tried booting into safe mode and checking if the phone is still overheating?

[Havaree]

Yes, from the moment i go on the internet. He's heating up. Also in safe mode. 

[najodleglejszy]

hmm, that's weird, I can feel my XZP getting warm but that's it, no excessive heating up. perhaps you could try repairing the firmware using Xperia Companion on PC?