4G on 5G sim

[Lucy8]

Hi, I’ve just upgraded and been sent an I phone 12 with 5G sim. There is no 5G in my area so I currently have no network and can’t use my phone away from WiFi. Is there a way I can use the phone on 4G? I have altered the settings in data roaming and selected 4G but my phone still has no network so can’t receive calls / texts and can’t use internet unless on WiFi. Thanks

[MI5 · Accepted solution]

@Lucy8 

Use your old sim in the new phone. 

[Bambino]

@Lucy8 The 5G sim that was included with your new phone is blank. You can carry on using your old sim, but if you want to avail yourself of O2's 5G service when you're in an area that has 5G, you will need to do a sim swap. You can go to an O2 store and they will do the swap for you, or you can do the swap by following this guide: SIM Swap: a mini guide (incl eSim) - O2 Community

The new 5G sims are backwards compatible, so your phone will still work in your area, even though 5G isn't available there as yet.