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New Member

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1 Message

Wed, Feb 19, 2020 3:15 PM

Error 21

I keep getting error 21 when I try to send text and I don't have data,is it a billing issue or a phone issue

Responses

Constructive

Employee

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8K Messages

2 months ago

we would have no idea as were just customers here, you need to call at&t

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mobilemax

Employee

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796 Messages

2 months ago

Hello,

Looks like that was solved here:

https://forums.att.com/conversations/samsung/error-code-21/5df02eb3bad5f2f606139d12

“The "Error 21" code means too few digits or bad digits in destination number, such as # or *. We recommend re-sending the text message using a valid 10 digit mobile number.”

*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.
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