Failing to roam after crossing an EU border

[Gxwr]

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?

[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?

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Reboot. Trevor does not help.

[MI5]

@Gxwr 

Have you got your network selection set to auto?

[Gxwr]

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

[MI5]

How old is your sim card @Gxwr ?

[Gxwr]

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.

[MI5 · Accepted solution]

@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.

[jonsie]

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@Gxwr wrote:

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

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

You have it as a capital O?

[Gxwr]

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!

[Gxwr]

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