How to check does GSM modem works

Sometimes you can think that Neo1973 does not want to recognize your SIM card. Werner Almesberger sent informations how to check it to framework-devel list. I want to extend it a bit.

(do not panic if you will get other line after ‘Connected’)

here you can get +CME ERROR: SIM PIN required message so you need to enter PIN

replace 1234 with proper PIN of course - Select network operator (register to network)


semicolon is needed to mark that this will be voice call — my SE k750i phone recognize both form but also give me information does it is voice or data call.

If this sequence does not work on your phone then write to mailing list.

openmoko phone