topic Re: No service unless on WiFi in Pay Monthly

No service unless on WiFi

SystemGhost — Wed, 10 Sep 2025 18:16:42 GMT

Hi, been through numerous calls with o2, so seeing if anyone here could help.

About a week and a half ago my network stated to become intermittent and mid last week I lost all network access, whereby I cannot make or recieve calls, cannot make or recieve texts, and have no Internet access on my S23 Ultra.

o2 sent me a replacement sim and when it arrived it was not for the device I was having issues on, so another sim was sent which was the correct one but when activated I was still not getting any network service.

o2 then issued an e-sim and again, I still have no network and still unable make or recieve calls, make or recieve texts, and still have no Internet access, even though they have said it is active.

The only time everything works is when I am connected to WiFi which is pointless.....

So far the following have been done:

New sim and e-sim have been tried

The physical sim was tried in both sim slot 1 & 2 of the phone

A reset of network settings has been done

A reset of WiFi & Bluetooth settings have been done

The new sim worked fine in other devices

Sim cards from my other devices worked fine in this phone (S23 Ultra)

Phone diagnotics show no issues

Back and forth with o2 is just getting nowhere.....

Re: No service unless on WiFi

MI5 — Wed, 10 Sep 2025 18:25:50 GMT

@SystemGhost wrote:

The new sim worked fine in other devices
Sim cards from my other devices worked fine in this phone (S23 Ultra)

@SystemGhost

The part I snipped is worrying as it defies logic.

If there's no sim fault and no phone fault it surely must work !

Did Samsung run the diagnostics as I can only assume the fault is intermittent?

Re: No service unless on WiFi

SystemGhost — Wed, 10 Sep 2025 18:35:33 GMT

This is what I am having trouble understanding....

I tested a working sim from my tablet (also on my o2 account) in my S23 Ultra and it was working.

The new replacement sim i had received for my non working sim in the S23 Ultra worked fine in the tablet.

All this was done whilst on the phone to o2 at their troubleshooting request.

Diagnostics were only tested via the settings on the S23 Ultra by myself, but I am visiting a Samsung store tomorrow just to see if they can do their own diagnostics (not that I could see it making much difference as other sims work fine in this S23 Ultra)

Re: No service unless on WiFi

MI5 — Wed, 10 Sep 2025 18:42:59 GMT

@SystemGhost

Be sure to take the non working sim too.