Skip to main content
AT&T Community Forums
Announcements
Learn how to Get the iPhone 12 Now!

Contributor

 • 

1 Message

Sat, Jun 6, 2015 12:15 PM

Error Invalid Number. Please re-send using a valid 10 digit mobile number or valid short code

Hey, so my friend got a Galaxy s6 edge yesterday and gave me his new number. When I tried texting it I received this immediately after:

Error Invalid Number. Please re-send using a valid 10 digit mobile number or valid short code. Hey

I can receive messages from this number as well as calls. I've become aggravated and am not sure what to do. Please help, thanks!

Responses

Accepted Solution

Official Solution

ATTMobilityCare

Community Support

 • 

15.2K Messages

5 years ago

Hi there @Launiusj

 

I’d be happy to help with this messaging error! This will be due to the device storing the number incorrectly. Please do the following to resolve the issue:

 

  • Delete texts from both old number and new
  • Delete any call logs including these numbers
  • Delete old number from contacts
  • Delete new number from contacts
  • Restart device
  • Send text to the new number directly (do not save as contact)
  • Once the text sends successfully, you can then save as a new contact

 

I hope this helps!

Charise

AT&T Customer Care

Need help with an account specific question?  Post a new question here on the forums by clicking the "Ask a Question" button.
For additional support, please visit us at our AT&T services hub.
Follow us on: Twitter @ATTHelp and @DIRECTVService

*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.

New Member

 • 

1 Message

Do these steps work with an apple phone?

Contributor

 • 

3 Messages

5 years ago

just started happeneing to me...none of these "solutions" work.

ATTDmitriyCM

Community Manager

 • 

9.5K Messages

5 years ago

Hi @Launiusj

 

Were you able to get your issue resolved? Please let us know if you still need any help.

 

Thanks,

Dmitriy

Rethink Possible


Did a post have an answer that worked for you? Help other users by marking helpful posts as an "Accepted Answer". And don't forget to leave a Like!

Still need help? Ask a question! Our 1.4 million members typically respond within 1 hour.

*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.

Contributor

 • 

1 Message

5 years ago

Hello. I'm Galaxy S6 edge user. I deleted everything but it is still not working. I can't send a message. I can text evreyone except only one contact. Plz help me. This is important for me

Tutor

 • 

4 Messages

5 years ago

I finally figured out why my android phone keeps dropping the area code and failing to send the message when I text a contact! It's because the contact has parentheses around the area code. Please don't use parentheses - that's the OLD days. Just delete the parentheses around the area code in all your contacts, make sure it saves, and delete the old thread that with the missing area code. YAY!

Tutor

 • 

4 Messages

5 years ago

Contributor

 • 

2 Messages

5 years ago

Accepted Solution

akoxeno

Scholar

 • 

146 Messages

4 years ago

I am getting the OP's error message when trying to return an SMS from an international number. (The sender is Android, I am iP.) Of course, the international number has 11 digits but whether I start with + or 011, the result is the same.

 

I don't know how to determine a "short code" that could resolve this issue according to the error message. How does one determine something like this?

 

The error message is sent from +1(1) (216) 116-11

Contributor

 • 

1 Message

4 years ago

This didn't help me.

Contributor

 • 

2 Messages

3 years ago

I’m experiencing this right now. I’ve been saving contacts the same manner ever and able to message my friends, but now I am having a hard time for these two contacts. Help! 

Contributor

 • 

2 Messages

3 years ago

I had to totally delete the contact and recreate to get rid of the problem

Contributor

 • 

2 Messages

3 years ago

Backed up, deleted all my 1000++ contacts and then restore but nothing happened.

Contributor

 • 

1 Message

2 years ago

My solution turned out to be much simpler than deleting conversations and contacts. I first used AT&T chat support, and ended up being told I would have to factory reset my phone. I then called their support line. They had me turn my phone off, then they reset my number on the cell towers (or something like that). Turned my phone on and everything was back to normal. She also told me just turning phone off for a few minutes and back on should do the same thing, but that didn't help when I tried it.

Contributor

 • 

1 Message

2 years ago

Did you get your phone to work and if so how?

Contributor

 • 

1 Message

a year ago

None of these solutions worked for me.

 

is anyone from AT&T monitoring this thread anymore?

 

i really don't want to spend 20 mins on the phone w ATT customer service for such a basic failure that is only happening w this carrier.

Get started...

Ask a new question