I have SIM800L module,
when I try AT+CSQ it returns 0,0
when I tried to remove the sim and try again it returns number, 0 (25,0)
and I cannot register to a network
so AT+CREG? returns 0,2
should I activate something or do another command before trying to do CSQ or either connect to a network..
when I try: AT+COPS=?
it lists all networks available, but cannot connect to any of them