Samsung S7 with intermittent missing data signal

[crmpicco]

I have a Samsung Galaxy S7 which is on the o2 network in the UK.

It has an intermittent and chronic issue where there is no data signal or coverage, yet I have 4 or 5 bars of signal. I know that the area I am in has a 4G signal with that carrier as I have an o2 phone sitting next to my S7 and it has 4G displaying and working as expected.

I have tried a brand new SIM card with o2, but to no avail.

I know that my tariff is 4G enabled as I have been out and about on a video call, but there’s been numerous occasions where I’ve tried to use WhatsApp or google something and I have no data signal. These are in built up towns that definitely have 4G and are not in black spots.

I’m wondering if this could be a fault with the handset, but I’d like to know what else to try or where else to look.

Does anyone have any suggestions?

 

[B. Diddy]

Welcome to Android Central! Was this phone originally from O2, or is it unlocked from somewhere else? What's the exact model number?