Error invalid number when I send text messages, 121611611

Have you tried deleting the contacts having issues from your phone and readding them?

Thanks for that suggestion, but it didn't address the problem. Any other ideas?

Try entering one of those contact’s 10 digit number manually instead of sending to the contact. If the manually entered number works, that suggests something wrong with the contact or perhaps some phone setting that automatically adds something to those contacts.

Hi there @klausmagoo.

Thanks for reaching out to us. We can certainly understand how frustrating it is to be unable to send a message. It would a pleasure to assist you with the invalid number error occurring on your Samsung S22.

The cause of this issue can possibly stem from the device retaining the +11 digits in memory. 

To fix this issue, we advise deleting the SMS thread that the error occurs on and start a new thread to correct the issue.

This error can also occur if you have Advanced Messaging enabled on your device, and you may need to disable the feature. Check for additional information, please visit our Advanced Messaging support page for more help.

If deleting/restarting the text thread and disabling Advanced Messaging does not work, please proceed to troubleshoot your device. 

If your issue is still not resolved, please reach back out to us.

Ashley, AT&T Community Specialist 

You should also try deleting any group messages those contacts may have been a part of.

Hello ATT, I still need your help.  What is the next step, can you open a ticket for me? Thanks. 

Let us take a closer look into this for you klausmagoo.

Let's meet in a Direct Message to further discuss your concerns. Please check your Direct Message Inbox (it's the chat icon next to the bell icon in the upper right corner of the Forums).

We look forward to assisting you!

Marilyn, AT&T Community Specialist

Hello are you available to assist me today?

open a ticket please

Hi klausmagoo, 

Please meet us in a Direct Message Inbox (it’s the chat icon next to the bell icon in the upper right corner of the Forums) so we can continue troubleshooting and escalating your text message concern. 

Looking forward to speaking with you!

Rhoda, AT&T Community Specialist