New Member
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1 Message
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
New Member
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1 Message
Constructive
Former Employee
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32.9K Messages
4 years 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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797 Messages
4 years 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.”
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