Help Center
Quick Links
What do I do if I have a SIM card error message?
If your phone displays a SIM Card error message, do a couple of quick checks.
Firstly, ensure that you have inserted the Tello GSM SIM into a compatible device - use our device checker to confirm this.
Secondly, ensure that your phone is unlocked. Contact the previous phone carrier (or phone seller) to confirm this.
Once you have confirmed the above, follow these steps:
Firstly, ensure that you have inserted the Tello GSM SIM into a compatible device - use our device checker to confirm this.
Secondly, ensure that your phone is unlocked. Contact the previous phone carrier (or phone seller) to confirm this.
Once you have confirmed the above, follow these steps:
- Turn your phone off.
- Remove the SIM Card.
- Make sure the SIM Card isn’t damaged or you’ll need a replacement.
- Insert the SIM Card back into your phone.
- Turn your phone back on, follow any on-screen steps provided and your phone should start to automatically activate the Tello service.
- "sim not supported"
- "network lock,"
- "network unlock pin,"
- "unsupported sim"
- "SIM Lock"
- "SIM Invalid"
- "Network Lock"
- "SIM Not Supported"
More related questions
Can't find what you're looking for?
Contact Tello Support