My Sony Xperia Z5 restarts several times and no signal can be detected.

[AC Question]

I have Android version 7.1.1 installed and my phone restarts at any time without any prompts to do so. My sim card is recognised but no signal can be detected. I have tried changing the preferred network type, restarting the phone and selecting Network operators to detect the network automatically, but it could not be found. The sim was placed into another phone and works perfectly. I am also unable to delete any photos or videos. What could the problem be?

 

[B. Diddy]

Welcome to Android Central! First, try wiping the cache partition: SONY Xperia Z5 - Recovery Mode - HardReset.info. If that doesn't work, see if the problem persists in Safe Mode: How do I enable and exit safe mode? – Sony Xperia™ Z5 Premium Dual support (United States)

 

[CotswoldImagery]

Nothing sorts it. Hardware fault maybe??

I am having the same problem on and off. I have tried everything as suggested from on and off to reinstalling software. I have a feeling this is an internal fault with Sony.

Any help would be great!