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Question: Error Invalid Number message in texts.

I thought I fixed this problem a month ago per another discussion's suggestions.


I had been getting the "+1(1)216116-11 Error Invalid Number Please re-send using valid 10 digit number" message even though the numbers were 10 digit.


I deleted the contacts and texts. Updated software to current iOS 7.1. Powered off then back on. Then re-entered the info.


It worked until this morning with the same 2 random contacts. But it is my son and best friend. So now I am frustrated.


I have checked more discussions and the fixes seem to be random as well. Does anyone have any new ideas?

iPhone 5c, iOS 7.1

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Jul 8, 2014 7:32 PM in response to charlie358 In response to charlie358

I had this same issue to a number I had been texting daily for months! After I tried everything--I figured it out! Even after I deleted the contact and set it all back up again, it still wouldn't work and I would get the "+1(1)216116-11 Error Invalid Number Please re-send using valid 10 digit number" error message. BY chance, as I was typing in the number for a new trial text, the number popped up from "recent history" (the list of all recent texts to that number or name). Even though I had deleted ALL texts to and from her and all contact info, the number was still stored elsewhere. It dawned on me that her number and her contact info was stored in the memory as "recent text history". I had to delete every instance of a text that had her number in it (including group texts), then when I reentered it, it worked! I believe the whole thing started when someone had her incomplete number in a group text, and from then on, it was getting her number from that recent text instead of mine! I found it by accident and there HAS to be an easier way, but here are the steps:

1. Delete the name and number from your contact

2. Start a new text by typing in the first letter or so of the person's name (or the digits of the number) and they should still pop up in a drop down box

3. Instead of selecting it for the text recipient, select the little "i" beside it and a new menu will pop up (that is the RECENT menu)

4. Select REMOVE from the top right corner

5. Do this for every instance with the name and number in it

6. Try a new text--nothing should pop up when you enter the number if everything is removed. It should now work

Hope this helps someone else!

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Question marked as Helpful

Jul 8, 2014 7:32 PM in response to charlie358 In response to charlie358

I had this same issue to a number I had been texting daily for months! After I tried everything--I figured it out! Even after I deleted the contact and set it all back up again, it still wouldn't work and I would get the "+1(1)216116-11 Error Invalid Number Please re-send using valid 10 digit number" error message. BY chance, as I was typing in the number for a new trial text, the number popped up from "recent history" (the list of all recent texts to that number or name). Even though I had deleted ALL texts to and from her and all contact info, the number was still stored elsewhere. It dawned on me that her number and her contact info was stored in the memory as "recent text history". I had to delete every instance of a text that had her number in it (including group texts), then when I reentered it, it worked! I believe the whole thing started when someone had her incomplete number in a group text, and from then on, it was getting her number from that recent text instead of mine! I found it by accident and there HAS to be an easier way, but here are the steps:

1. Delete the name and number from your contact

2. Start a new text by typing in the first letter or so of the person's name (or the digits of the number) and they should still pop up in a drop down box

3. Instead of selecting it for the text recipient, select the little "i" beside it and a new menu will pop up (that is the RECENT menu)

4. Select REMOVE from the top right corner

5. Do this for every instance with the name and number in it

6. Try a new text--nothing should pop up when you enter the number if everything is removed. It should now work

Hope this helps someone else!

Jul 8, 2014 7:32 PM

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Jul 8, 2014 7:33 PM in response to charlie358 In response to charlie358

It seems the number is invalid so AT&T respond back saying that "at&t +1 (1) (216)116-11 error invalid number please resend using 10 digit mobile number"


If you are using the right number and you know for sure it is a working number, try delete the number in question that you try to text to like call history or text history of that number and just delete it. Do not delete the number in your contacts though. Delete history pertaining to it in calls and text.


Then try it again to text to the number.

Jul 8, 2014 7:33 PM

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Feb 3, 2015 12:50 PM in response to dcuno In response to dcuno

At first I could not get this solution to work.I followed the steps exactly but then I discovered that the number was buried in some group texts. After deleting every group text with the number in it the problem was solved. Thanks for the very useful post. ATT didn't have a clue how to solve it.

Feb 3, 2015 12:50 PM

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Apr 30, 2015 12:27 PM in response to charlie358 In response to charlie358

All those steps have not helped me, but after completing the steps described here I also did the following, and it worked! After removing the phone number from recent memory and deleting it from the contacts, I also had to delete all texts history from my other contacts who have ever included this phone number in their texts. So seems like if you have that phone number stored in some other texts or group texts, you will need to delete all those to get the result. If you are not sure, just delete your entire text history with all contacts (I know its hard to impossible to do given all the info we store in our text messages), but that was the only thing that eventually worked for me. Hope this helps

Apr 30, 2015 12:27 PM

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May 10, 2015 10:34 AM in response to Coolaper In response to Coolaper

I'm keeping my fingers crossed. I tried everything I could glean from the net to fix the text error I was receiving from ONE number in my contacts list which happened to be my significant other. I would send a text using the 10 digit number alone but almost immediately I would receive the error message with the number I had sent the text to now in a 7 digit format with the area code missing. I cleaned out that contact info from everywhere I could find it on my Iphone 4s but it would do the same error message each time. So I removed my SIM and put it in an old android I had and brought up the contacts and sure enough the problem contact was the first listed and the number was stored in both 7 digit and 10 digit format on the SIM card. I deleted the 7 digit entry on the android and resaved the info to the SIM. I then did a restore on my 4s through Itunes. After rebooting I checked that there were no contacts stored then went to Setting-Mail,contacts,Calendars-IMPORT SIM CONTACTS. I have sent 3 successful txts so far. I just rebooted my 4s and it is still working. Good Luck.

May 10, 2015 10:34 AM

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May 11, 2015 12:25 AM in response to charlie358 In response to charlie358

I ran into this problem after accidentally entering a 7 digit number for a new contact. I tried everything listed on this thread and elsewhere on the net - deleting the contact, the message history, the phone call history; searching and removing from the recents list, resetting network settings, restarting the phone, and even resetting 'all settings' but nothing worked - whenever I would attempt to send to the 10 digit number I would get back the 'invalid number' text referencing the 7 digit number.


Finally I came up with a work-around: you should be able to trick the phone by switching out one of the last 7 digits for the corresponding letter on the phone keypad - for example instead of 5121234567 use 512123456p. This at least lets me text the offending number, but it is not ideal as I can't reply back directly in the same text thread - I have to go back to the work-around number to send a reply.


This was an INFURIATING problem and really puts a dent in my opinon of Apple that they have let this issue fester for years, apparently. How hard could it possibly be to simply use the number currently associated with the contact, or reply back to the same number received from?


Anyway do try all the other fixes first, but switching out a number for a letter might just help as a last resort. Good luck.

May 11, 2015 12:25 AM

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May 22, 2015 8:38 PM in response to charlie358 In response to charlie358

I just fixed this problem! After deleting the contact and all threads that include the number, try resetting the network. If that still doesn't fix the issue, try clearing Safari cookies (Settings -> Safari -> Clear History and Website Data). Then reset the network settings again (Settings -> General -> Reset -> Reset Network Settings) and you should be able to type in the 10-digit number and successfully and send a text!

May 22, 2015 8:38 PM

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Question: Error Invalid Number message in texts.