Given the age of the LG G3, if Steps 1 through 5 do not resolve the issue, the device is likely no longer fully compatible with U.S. Cellular’s modernized LTE/VoLTE network architecture. It is recommended to upgrade the device.
Before troubleshooting, you must verify the device is compatible with the current U.S. Cellular network. lg g3 data not working us cellular
As a lightweight background agent in the U.S. Cellular app (Android 4.4–5.0 compatible), or as a standalone downloadable fix tool for legacy devices. Given the age of the LG G3, if
U.S. Cellular reps often give generic “reset network settings” which fails if the baseband or APN is carrier-specific. lg g3 data not working us cellular
Go to > Network & Internet (or Tethering & networks ). Ensure Mobile Data is toggled ON .