We've all ran across our share of error codes, but some are more malicious than others. Error code 501 is one of those, ...
Use a SIM ejector tool or paperclip to gently remove the SIM tray. Take out the SIM card and inspect it for damage, such as ...
Fix the 'No SIM Card Detected' error on Android with 15 proven solutions. Quick fixes, eSIM troubleshooting, and when to get a replacement SIM.