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We collect a bit of background information on Cell Broadcast Messages which are used to e.g. signal emergency situations. Receiving MMS is not yet integrated, check the page on MMS support on how to compile the experimental support yourself.

A few tips and howtos
  1. To make a call from the command line, you can issue xdg-open tel://XXX
  2. A geeky way to read contacts stored on your SIM card is presented in: Reading contacts stored on the SIM card
  3. So send of USSD Codes, you can use the regular calls application. On a terminal you could also issue
    mmcli -m 0 --3gpp-ussd-initiate="*106#"

    and replace *106# with the code to dial.