Transferring an O2 SIM-only SIM card to a new SIM-free phone.

[Anonymous]

I have a Sony Xperia M (Android 4.1.2) phone bought as a SIM-free phone. I have a SIM-only, pay-monthly, SIM inserted in that Sony Xperia M. 

If I buy a new SIM-free phone, can I just transfer the existing SIM-only, pay-monthly, O2 SIM card to the new phone, or would I have to contact O2 first?

[Bambino · Accepted solution]

You can transfer it without having to do anything, as long as the sim you have is the right size for your new phone.

[MI5]

and if the same OS.
If you were to buy an iPhone you would need to get data package changed.

[Anonymous]

My current SIM is micro size. I'd should make sure the new SIM-free phone takes micro size as well. Thank you.

[perksie]

What you pay for is the service on the sim card, depending on the answers above you can use any phone you like.

You can use an adapter or swap the sim as necessary.

[Anonymous]

You can transfer your tariff and number to any sized SIM card you may need via the swapmysim procedure.

[Anonymous]

Thanks, MI5. Bambino has just pointed out the new phone's SIM card would have to be same size, in my case, micro. You've just made me aware, if I were to buy an iPhone I'd have to buy data package.

[Anonymous]

I can use an adaptor. Thank you, perksie.

[Bambino]

You probably already have a data package. If you were to buy an iPhone you'd just have to have O2 switch it to idata. Also the new iPhones take nano sims which are smaller than micro. You would have to just swap sims, which you could do in an O2 store or order one online and do the swap online.

[Anonymous]

Thanks, bandofbrothers. You've made me aware there is such a thing as swap-my-sim procedure.