Question about LG Vu CU920 Cellular Phone

4 Answers

Text Error 1121611611

Lately I've been getting the following error "1121611611 - Error Invalid Number. Please re-send using a valid 10 digit mobile number or valid short code. .... (and then it lists the actual text that I attempted to send)

So then I go back in a re-send using a 10 digit number and I get the same message. What am I doing wrong?

Thanks! I have brand new LG Vu and have the same problem with some texts but not all...I have AT&T and find this trouble with both others using AT&T and also outside of AT&T.

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  • Anonymous Mar 27, 2009

    me too argggg waited for 15.47 minutes with att customer service. then i gave up

  • Anonymous Apr 20, 2009

    Same problem here... AT&T can't fix it either!

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I have an unlocked T-Mobile Dash which I am using with AT&T sim card. I had a similar problem - whenever I booted the phone up, I was getting this sms (text) message, until I figured out what it was. The phone at bootup was sending a T-Mobile internal message to invoke the Favorite 5 list refresh, and it was a reply from AT&T network which didn't understand this message.
To fix it I simply removed this shortcut: \Windows\StartUp\My5MsgCenter.

Posted on Sep 14, 2009

  • peter guadagnin
    peter guadagnin Oct 01, 2014

    I have an unlocked T-Mobile LG9 which I am using with AT&T sim card. My service is AT&T GoPhone and it's costing several dolllars a day. I don't know how to apply your fix; please help me.

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Remove this file:
MyDevice\Windows\StartUp\TMupdate

Solves the problem.

Posted on Jun 12, 2009

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If you are getting this one of the main reasons is that you are trying to send a text messgae to a Land line phone.

Posted on Jun 17, 2009

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I got same problem, called ATT to activate phone...solved it!

Posted on Jul 23, 2009

  • jimATTuser Feb 03, 2011

    I had the same issue. Turns out I Auto responded to a Text from Yahoo. The response Text went to a phone number that wasn't a 10 digit phone number, so ATT responded with the error message. Unfortunately, the FROM number from ATT wasn't a 10 Digit phone number, so I auto replied to that number and went into a never ending loop with ATT. They sent the error and I sent the response to the non-10 digit number. Finally I caught it and stopped the auto response. Even after that I received about 500 queued up text messages from ATT. What a nightmare.

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