Carrier settings updates are small files that are installed on iOS devices . The carrier settings include updates to Access Point Names (APNs), MMS settings, features like tethering and default apps. Having the most up to date carrier settings is recommended for the proper functionality of the device.
Read moreDoes an iPhone have to have a carrier?
An iPhone can work fine without a carrier , but you won’t be able to make Cellular calls without an active service plan from a carrier. The service plan is what lets you among other things make cellular voice calls.
Read moreHow do I know what carrier is my iPhone?
To see the version of carrier settings on your device, tap Settings > General > About and look next to Carrier . To see additional carrier information, tap the version number. To verify that you have the latest carrier settings installed, contact your carrier.2 Haz 2021
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