Sometimes carrier settings are pushed via software updates.
Ensure your SIM card is clean and properly seated in the tray. If your phone is using an eSIM, ensure the cellular plan is "Turned On" in your settings. Alternative Activation Methods 228 us cellular not working
: Power your phone off, wait 30 seconds, and turn it back on. This forces the device to reconnect to the nearest tower and update its carrier settings automatically. Sometimes carrier settings are pushed via software updates
4G LTE and 5G networks use SIM cards or eSIMs to handle activation and network updates automatically. These devices do not require manual programming via *228. wait 30 seconds