topic Re: Can't Roam HELP in Roaming

Can't Roam HELP

mE8419 — Sat, 15 Nov 2025 12:39:59 GMT

I have a full works SIM only contract which includes roaming everywhere. I am currently visiting USA and I can't make any outgoing calls but I can use my data and tx.

I have tried all the correct codes to call out and even changing my spending cap higher in case this was the issue but still nothing a call just doesn't connect.

Please someone sort this as I need to make calls while I am away.

Thanks

Re: Can't Roam HELP

Northerner — Sat, 15 Nov 2025 12:45:34 GMT

Hi @mE8419

What device do you have and is there a roaming setting under settings.

Are you using international codes when trying to call.

Can anyone call you.

Thanks

Re: Can't Roam HELP

mE8419 — Sat, 15 Nov 2025 14:25:19 GMT

I am using vivo x100 pro. I have data roaming on under settings. I don't see any settings about calling out.

Yes I have tried the international code and without no matter what I try the call just stays silent then ends

Re: Can't Roam HELP

Matt_124 — Sat, 15 Nov 2025 16:34:49 GMT

Try switching networks via a manual network search in your settings.

I believe AT&T was the one that some people switched to and it worked, but this may have changed.

Re: Can't Roam HELP

bristolian — Sat, 15 Nov 2025 17:12:39 GMT

This sounds very much like a VoLTE issue, swapping networks manually should indeed be the way to go. At the very least it will remove another variable.

Re: Can't Roam HELP

mE8419 — Sat, 15 Nov 2025 17:19:53 GMT

I restarted my phone and so far it has worked I can call out. Not sure what the issue was but if it happens again I shall post back.

Cheers for the suggestions and help guys fingers crossed it's finally sorted

Re: Can't Roam HELP

mE8419 — Mon, 17 Nov 2025 13:52:05 GMT

Your spot on. I restarted my phone and I suddenly could call. The only thing that changed was the VoLTE symbol appeared. (I have this ticked on as standard).

Unfortunately the symbol has disappeared again today and I can't call anymore. This is very frustrating as I shouldn't have to keep restarting my device when I want to make a call. Never happened on my previous network.

I tried selecting another network manually but it just said no service.

Abu suggestions for a permanent fix?

Cheers

Re: Can't Roam HELP

Leanne_T — Mon, 17 Nov 2025 15:38:29 GMT

Hi there @mE8419

Thanks for coming back to us.

If the signal drops when roaming, this could be a loss of service on the roaming network and a restart can help you get connected.

If this continues, you can get in touch with our tech guides and they can check everything at our end for you.

Leanne 🙂

Re: Can't Roam HELP

bristolian — Mon, 17 Nov 2025 16:13:35 GMT

@Leanne_T wrote:
If this continues, you can get in touch with our tech guides and they can check everything at our end for you.

Whilst valid advice, I don't think there's anything the frontline agents can realistically do here, if anything they could break a setting that's self-evidently already working.

This scenario likely needs a fault ticket raising to have network-level roaming config checked over. The fact that a restart resolves it for a short time before subsequently breaking, proves user-level config as being spot-on.

Might also be worth checking which local network you're connected to when you have problems calling/VoLTE drops, and which you connect to with a restart. If it's the same one, I'll repeat the advice above. If it's different, then your auto-selection is preferring a network that evidently has VoLTE-roaming issues - you may be able to use manual selection as a short-term workaround.

Re: Can't Roam HELP

Leanne_T — Mon, 17 Nov 2025 16:21:13 GMT

Hey @bristolian

Thanks for replying and for the feedback.

Our tech guides can raise a ticket to be investigated by the relevant support team, if needed, after completing some troubleshooting.

Thank you 🙂

Leanne.

Re: Can't Roam HELP

mE8419 — Tue, 18 Nov 2025 18:17:21 GMT

So this morning the VoLTE was present no issues then a while later it's gone and the only way to get it back is to restart the device. I have tried turning flight mode on and off as well unticking the VoLTE setting and back on again and it still doesn't show up.

My network here in the USA is T-Mobile. If I try to manually select another network I get no service message pop up straight away.

Now earlier when I did a flight mode on and off my device said my network was ATT and then it said VERIZON. I then did another flight mode as that's wrong and it got T-Mobile straight away like it normally does. Not sure what's going on. Frustrating that the VoLTE keeps dropping at random times. Not sure why I need it anyway to make a call as it's only to enhance the quality from what I understand so it shouldn't stop me making a call if not on etc maybe I'm wrong?

I'm here for 2 more weeks and hoping someone can resolve this as having to restart my device few times a day isn't practical.

Cheers

Re: Can't Roam HELP

bristolian — Tue, 18 Nov 2025 18:50:24 GMT

@mE8419 wrote:
Frustrating that the VoLTE keeps dropping at random times. Not sure why I need it anyway to make a call as it's only to enhance the quality from what I understand so it shouldn't stop me making a call if not on etc maybe I'm wrong?

You're right but also misunderstanding. No problem...

VoLTE does indeed have benefits with wideband ("HD"/"HD+" calling) audio and support for simultaneous voice & data.

In the absence of VoLTE however, calls require fallback to 2G or 3G (known as CSFB). In the UK, this is why VoLTE is required to access EE's extended-range 800Mhz layer as there is often not any 2G or 3G coverage overlapping. The USA is much further ahead with 2G/3G switchoff, and thus in the absence of VoLTE, there is no coverage either.

Re: Can't Roam HELP

Ali_A — Wed, 19 Nov 2025 15:48:33 GMT

@mE8419

Following on from what @bristolian mentioned, it may be worth performing a network settings reset, which should update the carrier settings and help your device stay hooked onto the strongest network signal available.

Let us know how you get on.

Ali