Upgrading SIM only while abroad (SIM swap?)

[YesMrWilliams]

Hi,
I'm a SIM only pay monthly customer and currently abroad outside of the EU due to COVID.

I'd like to upgrade to a new SIM only deal/tariff but I'm worried about what might happen as I am not returning to the UK to collect a new SIM or run any hash codes or whatever - I need my current SIM and services to keep working without changes or problems (aside from my tariff allowances of course).

Is anyone able to confirm that if I do a SIM only upgrade via the My O2 app, it won't affect my existing call divert (currently forwarding all calls to another UK number) and I won't need to swap/install a new SIM card or 'activate' anything, run codes, etc?

Thanks.

[MI5 · Accepted solution]

@YesMrWilliams 

You don't have to do anything with your sim or phone.

It's all updated on the system at O2's end.

[Cleoriff]

@YesMrWilliams 

It shouldn't affect your service at all whilst abroad. (I have upgraded a sim only tariff whilst in Spain)

All changes are made on the system not the sim, so there should be no issues.

[YesMrWilliams]

Just to add (I forgot to mention and can't seem to find an edit button) - I have another O2 SIM installed in a phone that's physically in the UK and running unattended (call divert enabled with O2 forwarding all calls, and an app running that forwards SMS text messages) - I'd like to upgrade the SIM only deal on that one too - but I can't reboot the phone or swap the SIM as I'm not able to physically access it - so the same question applies.
Thanks.

[YesMrWilliams]

P. S. Thank you to everyone that answered while I was typing out my follow up -that was fast!

[MI5]

You're welcome

[Cleoriff]

Happy to help @YesMrWilliams . Hope all goes well