New phone with old sim

[Guy]

I received my new S20 Ultra and since putting sim in I can't call or receive any and only get H+ signal

[Bambino]

@Guy You should be able to use your old sim with no difficulty. Does the sim work in your old phone? Try shutting the new phone off, take the sim out, and try it in your old phone. If it works, then reinstall it in the new phone.

[Guy]

I tried that and sim does not work in old s10+ now

[O2James · Accepted solution]

You could try with Skype if you have it

You could try Skype on 0800 032 1402 if the usual numbers are busy

https://community.o2.co.uk/t5/Off-Topic/A-Guide-To-Skype/m-p/1305104/highlight/true#M181823

[Guy]

tried but can't get through

[Guy]

I can't call from phone and H+ is so slow and can't connect

[MI5]

Keep trying.

[Guy]

Pointless. All the research I have just done is all bad as thousands are trying with no joy for days

[MI5]

We can't offer anything else I'm afraid. People are getting through if they persist..