On 08/04/2009 01:26 PM, Chris Adams wrote:
Is anyone else seeing problems sending SMS from AT&T to T-Mobile (or other providers)? When my monitoring system sends a message (via a GSM modem with an AT&T SIM card) "Test page 3", AT&T accepts the message, but I get an SMS back in just a few seconds from 1121611611 that says:
1xxxxxxxxxx Error Invalid Number. Please re-send using a valid 10 digit mobile number or valid short code. Test page 3
where xxxxxxxxxx is the 10 digit T-Mobile number I sent a message to. It looks like something on the network is prepending a "1" and then rejecting the message because of the "1".
I just sent an SMS to a T-Mobile phone from my ATT iPhone and had no issues. -- Paul Norton Systems Administrator Neoverve - www.neoverve.com Neoverve Blog - http://blog.neoverve.com/