Device never registered I'm configuring a SIM800 (in an Adafruit Fona 800/Arduino Uno) to use the following SIM IMSI:204043397615323 MSISDN:11836683935 ICCID:89... Miguel Zaratiegui, 2 years ago Last reply: Miguel Zaratiegui, 2 years ago 1 1 me too 1 1 reply Problem