Sim800L registration problem (FRANCE) - CREG=0,2 and CSQ= 0

Official Hardware Retired GSM Shield
1

Hello everybody,

I have a big problem with my Sim800L ... my two Sim800L. The module don't connect to the network. The led blink all 0.8s.

I have an external alimentation (3.7v, 4200mAh X 2) with a regulator -> 4V.

RX (SIM800) -> TX Arduino (with dividing bridge -> 2,8v)
TX (SIM800) -> RX Arduino
GND (SIM800) -> GND Arduino
VCC (SIM800) -> 4 V

When a send command :

- AT
return OK

- AT+CFUN=1
return OK

- AT+CPIN=?
return +CPIN: READY

- AT+CSQ
return 0,0 ... max value received is 11,0

- AT+CREG?
return +CREG : 0,2

I have tried with an other SIM800L and with an other SIM card but I have the same result.

An idea ? =)

2

Signal strength seems OK.
Is your carrier SIM card active?
Does your carrier support 2G ? (Coming to an end soon - replaced by 3G)
There are more commands to see what bands are available and recognised by the modem chip.