Making the SIM800L GSM module to send its own phone number when making a voice call

Question

I connected the GSM module to an Arduino Mini Pro and control it with AT commands. I can make a phone call, but the calle phone does not display the callers number. It displays "No caller ID". Although if i put the same SIM card into an old mobile phone and call the same phone than it displays the correct number.

This is what I sent:

AT // wait for OK

AT+CREG=1 // wait for CREG=1

ATD+XXxxxxxxxxx; // wait for OK.

the call is always succesful.

Is there any way to force the GSM module to send its phone number?

Thanks!

Answer 1

Taken from here: https://forum.arduino.cc/t/sim800l-call-private-number/543322

AT+CLIR=

Response

TA restricts or enables the presentation of the CLI to the called party when originating a call.

The Command overrides the CLIR subscription (default is restricted or allowed) when temporary mode is provisioned as a default adjustment for all following outgoing calls. This adjustment can be revoked by using the opposite Command.

OK

If error is related to ME functionality: +CME ERROR:

Parameters

(parameter sets the adjustment for outgoing calls):

0 Presentation indicator is used according to the subscription of the CLIR service.

1 CLIR invocation

2 CLIR suppression

(parameter shows the subscriber CLIR service status in the network):

0 CLIR not provisioned

1 CLIR provisioned in permanent mode

2 Unknown (e.g. no network, etc.)

3 CLIR temporary mode presentation restricted

4 CLIR temporary mode presentation allowed