Mailing List Archive: AT&T -> T-Mobile SMS?

AT&T -> T-Mobile SMS?

Aug 4, 2009, 1:26 PM

Post #1 of 3 (153 views)

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".

This has been working fine for a while and just quit working today
sometime.

--
Chris Adams <cmadams at hiwaay.net>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.

AT&T -> T-Mobile SMS? [ In reply to ]

paul at neoverve

Aug 4, 2009, 1:40 PM

Post #2 of 3 (152 views)

Permalink

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/

AT&T -> T-Mobile SMS? [ In reply to ]

auser at mind

Aug 4, 2009, 4:06 PM

Post #3 of 3 (151 views)

Permalink

Not sure if it's related but, I used e-mail -> ATT SMS and my girlfriend
got some of them immediatley while most of them were delayed for a few
hours. This went on around 11am PDT.

Typically, it's instantaneous. Not sure if the delay was on Google's
SMTP end, ATT's end, or both.

Paul Norton wroteth on 8/4/2009 1:40 PM:
> 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.
>