Why Does My Phone - Say Invalid Sim Better

If you just bought a phone and put your old SIM in:

: A simple reboot can often clear temporary software glitches. Reseat and Clean the SIM : Turn off your phone and remove the SIM card.

The root cause is usually one of three things: the physical card, your phone's software, or your service provider. why does my phone say invalid sim

Seek technician or carrier store assistance if:

What an "Invalid SIM" error means and how to fix it - Asiacell If you just bought a phone and put

This is the "moment of truth" to determine if the problem is the card or the phone.

Check for dirt and gently clean the metal contacts with a soft, dry cloth. Reinsert it firmly, ensuring it sits perfectly in the tray. Seek technician or carrier store assistance if: What

: Go to Settings > General > About (on iPhone) or Settings > System Update (on Android) to see if there is a carrier settings or software update available.

If a restart didn't work, you likely have a physical connection issue.