3g data

The presence or absence of that option is at the discretion of the carrier.

nam1959 wrote:

On the newest ios 15.4.1. There is no option to change to 3g/4g anymore from iphone 12 above. There is now 5g ann in some countries 5g isnt available yet. Apple should fix it and bring 3g back.

Apple doesn't provide cellular service, your phone carrier does.