use of a 4g phone for 3 g service

[Android Question]

can I use a 4g phone and not upgrade my service

 

[Rukbat]

A 4G phone will work on a 3G network, but if your carrier is upgrading to 4G, your phone will probably use 4G, and you won't see any change in your bill. If your carrier requires you to change your service to get 4G speeds, and you don't, your phone will continue to use 3G.