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Hi @tooz, Thanks again for the detailed response and for testing with the EM05 module! Good to know that the Tinker Board 3N’s SIM slot follows the Quectel spec. I’ll double-check with Quinton Hazell and also try the tools you mentioned (networkcli and the network manager) to see if LTE is working properly. Appreciate your help! Best regards,

Hi @tooz, Thanks a lot for your reply! I’ve tried a few different SIM cards, but none of them are being recognized. One thing I’m a bit unsure about is the connection between the M.2 B Key slot and the Nano SIM slot. Do I need to change any hardware or software settings for the SIM to work? Or should it just work automatically once the 4G module is installed and the SIM card is inserted? Appreciate any advice you can share! Best regards,

Hi everyone, I'm currently trying to use LTE communication on the Tinker Board 3N. To do this, I have added a 4G module (EM7430) and started testing. The OS recognizes the EM7430 module itself, but it does not seem to detect the SIM card. Has anyone experienced a similar issue or know what could be causing this? Environment: Tinker Board 3N Debian 11 (Kernel 5.10) OS version: V1.0.27 Any suggestions or advice would be greatly appreciated. Thank you in advance!