GSM Shield with T-Mobile SIM, I get "NO CARRIER"

Hardware Arduino GSM Shield
1

Hello fellow Arduino users.

I'm playing around with the a SEEED STUDIO GSM module with the Arduino UNO.
I have a T_Mobile SIM and having trouble making a call or sending a text message.

When I power-up the GSM module, I get the following responses on the serial monitor:
RDY
+CFUN: 1
+CPIN: READY
+PACSP: 1
Call Ready

When I send the command "AT+CREG?" I get a response of:
+CREG: 0,1

Per the SIM900 AT Command Set, I decipher this to mean the device is Registered on the network.

However, when I type "ATD 18005551212", I get "NO CARRIER".

Hhhhmmmmmm...... am I missing something? Shouldn't I be able to dial a number?
Any suggestions??
Thanks,
Tim

2

"NO CARRIER" means it's not connected to the GSM network. Check your APN settings, and possibly your data plan.

3

you have to put semicolon after number

ie.,

..........

ATD+************;

..........

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4

I cant believe I wasted one day thinking it wasnt registred properly... and I was missing a ";". They sould return a proper error not "NO CARRIER"

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