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Failing to roam after crossing an EU border

Gxwr
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When I arrived in an EU country from the UK, and when I cross any EU border, my SIM fails to reconnect. Roaming is on and I have the European bolt-on. If I deactivate/reactivate the SIM sometimes it works. Other times I have you Trevor the phone. I always get it back but it's a major pita. What is wrong?

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MI5
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@Gxwr 

I'd start with a new sim card.

Pop into any O2 shop and they will swap you to a new one free of charge.

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)

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Gxwr
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@Gxwr wrote:

When I arrived in an EU country from the UK, and when I cross any EU border, my SIM fails to reconnect. Roaming is on and I have the European bolt-on. If I deactivate/reactivate the SIM sometimes it works. Other times I have you Trevor the phone. I always get it back but it's a major pita. What is wrong?


Reboot. Trevor does not help.

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MI5
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@Gxwr 

Have you got your network selection set to auto?

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
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Gxwr
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I have. Also, APN is mobile.O2.co.uk

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MI5
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How old is your sim card @Gxwr ?

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
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Gxwr
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Between 4 and 5 years. I joined to use TuGo and did so for a few months until it closed. Btw I have a dual SIM phone with Orange France in slot 2 which is fine including wi-fi calling. Primary calls and all data are on O2 though. Thanks for the discussion.

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MI5
Level 94: Supreme
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@Gxwr 

I'd start with a new sim card.

Pop into any O2 shop and they will swap you to a new one free of charge.

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)

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jonsie
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@Gxwr wrote:

I have. Also, APN is mobile.O2.co.uk


Is that a typo @Gxwr as the APN should be  mobile.o2.co.uk

You have it as a capital O?

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Gxwr
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Excellent idea, thanks, I'll do that when I return to the UK. Will have to wait a while to be able to test the result though!

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Gxwr
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Yes, a typo. Didn't realise it mattered. Thanks.

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