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| Aspect | Detail | |--------|--------| | | ❌ No – for most modern phones (4G/5G LTE/VoLTE devices) | | Why? | US Cellular has moved from CDMA to LTE/5G. *228 can corrupt SIM-based LTE provisioning. | | Legacy devices | ⚠️ May still work on older 3G/CDMA-only phones (being phased out). |
: UScellular has retired much of its legacy CDMA infrastructure. Attempting to use *228 on a modern device often results in a "call cannot be completed" message or a system error. 228 not working us cellular
*228 OTA Programming (Deprecated) Status: Legacy – not supported for 4G/5G devices on US Cellular Error resolution: Do not use *228 on modern US Cellular phones. Use SIM-based activation and carrier settings updates instead. Exception: Only possible on pre-2017 3G basic phones still active on CDMA. | Aspect | Detail | |--------|--------| | |
If your phone simply says "No Service" or "SOS only": | | Legacy devices | ⚠️ May still
Historically, dialing allowed users to update their Preferred Roaming List (PRL) or activate 3G CDMA devices. However, several factors now make this code obsolete: