How to read and write also a cellular number to sim phonebook?

[tradexsrl]

Hi i need to write and read also a phone number (+391234567890) to sim into mkrgsm 1400 is it possible to add these function?

[phlpjo]

This library was created to give the MkrGsm1400 a non-volatile memory. For example, to save settings that come in via an SMS.
Unfortunately my MkrGsm1400 is broken. I can no longer work on the library.