If you have cleaned the SIM, restarted the phone, and tested the SIM in another device, and you are still seeing the error:
The root of the problem usually falls into one of three categories: why is my phone saying invalid sim
A temporary bug in the operating system or outdated network settings is preventing a connection. If you have cleaned the SIM, restarted the
If the SIM was working fine previously, this is unlikely, but it happens. If you have cleaned the SIM
| Scenario | Recommended Action | |----------|--------------------| | SIM works in another phone | Repair phone (SIM slot or software) | | SIM fails in all phones | Replace SIM from carrier (often free or <$10) | | Phone works with other carrier’s SIM | Unlock phone from original carrier | | Error appears after dropping phone | Hardware repair (SIM tray or motherboard) |