iPhone 12 4.5G açma

Your phone is likely to switch from 4G to 3G when you find yourself in an area without 4G service . This means your phone will be without an LTE signal. But if you’re sure the area is 4G covered, then you can force your phone to search for an LTE connection.

VoLTE has up to three times more voice and data capacity than older 3G UMTS and up to six times more than 2G GSM. It uses less bandwidth because VoLTE’s packet headers are smaller than those of unoptimized VoIP/LTE. VoLTE calls are usually charged at the same rate as other calls.

If your carrier doesn’t support VoLTE and is a CDMA carrier, you’ll only see an option to Enable LTE. This allows cellular-data use over the LTE network when available .