Sony xperia m4 aqua 4g data doesnt start.

[njazi123]

Hello.
In my xperia m4 my 4G sometimes starts and sometimes it doesnt... When it doesnt start i have to restart my device im ordes to start working.
Any help?

[Uliwooly]

How is the network coverage? how old is the SIM card? 

[njazi123]

the network coverage is great...
As for the sim card is new...about 7 months old or less...
Let me explain my problem better.
I go to work and i turn on the 4g so i can have internet outside, sometimes it turns on emediantly but sometimes i have to restart the phone in order to get it work.

When i have it working finally i leave my phone on the desk and when i pick it up after a few hours the 4g is close...the icon on my notification drawer is turned on but i cant access the internet and when i close it and reopen it then again wont open, agin i have to restart the device...

I have android 6.

What may the problem be???

[Uliwooly]

That's quite odd, could you boot in >>> safe mode to test it ?

[njazi123]

i turned it on in safe mode and in normal mode and it worked but later i am sure it will do the same thing again...

What else should i do?

I mean it doesnt look to be a hardware problem...

[Uliwooly]

Use the phone in safe mode for few hours to test it

[njazi123]

ok i will do it tommorow when i get to work...

I will reply again tommorow, thank you for your help

[njazi123]

So as you told me i went to safe mode...
I had my phone in my pocket for about half an hour and the 4g wasnt working...
It was turned on but not working...
What do i do?