I have AirPrime EM7455 modem at Lenovo Thinkpad notebook and I need to send APDU commands to SIM under UEFI by AT commands to modem (or directly, if it possible). What is the right way to do it, how to find the modem in UEFI and activate AT interface? Do I need to create efi driver for that or any standart way exist?
I am not sure how to enter EM7455 AT command from UEFI. It might have some policies to do something on it. This is not belongs Sierra perspective so please contact Lenovo support for reference