A collection of functions to interface with the ARDUINO MKR GSM 1400 Sim card phonebook/contact memory. Not optimized.
Basic Usage in main loop
Thanks to:
https://arduino.stackexchange.com/questions/1370/getting-the-contacts-storing-contacts-to-sim-card
https://arduino.stackexchange.com/questions/10068/how-can-i-add-phonebook-entry-to-sim-card-using-arduino-gsm-shield