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Help error 21 help

T

tank5507

Newbie
When I try to send a text message to one of my contacts, the message doesn't go through. A notification pops up after a few seconds, "Message not sent", and a red triange with an exclamation point shows up next to the message.

When I select "message details", it says "Error Code: 21".

I have no problem messaging my other contacts.
I have been unable to find anything relating to this error code, and I'm wondering if anyone has any idea what it means?
Thank you for any and all help!


P.s. I know she hasn't blocked me.
 
yeah I've tried so many times. I have a tiny hole to factory reset..idk if that would be the best thing to do or not?
 
The tiny hole isn't for a factory reset, it's for ejecting the SIM Tray. (It is on my N4 anyway, the holes at the bottom and top are the mics)

Have you tried a simulated battery pull? As opposed to turning on and off, hold the power button down for circa 15 seconds. What about clearing the cache and data of the Messaging app (You'd probably lose all messages if you did that)?

Also moved to the N4 forum, see if the guys there have any ideas. :)
 
This has occasionally happened to me. Sometimes I can send additional messages to that contact fine. Not sure what causes it, but try the simulated battery pull that El Presidente suggested as that will clear up most problems. I usually just delete the message that didn't go through and carry on. Doesn't happen often.
 
Dial *#*#4636#*#*.

You will get a menu, from that select Phone Information

You will find a setting "SMSC"

Refresh it. It is most likely to retrieve the message center number from your operator. (Or call your operator, and get the message center
number, and then update in this field)

Then the problem should be resolved!
 
I had this issue and what worked for me is re-editing the number in contacts. For some reason some numbers are saved without a space +1234567890 but when I re-enter the number it has the format +123 45 6789. The contacts app automatically adds the spaces. I tested before and after with multiple numbers and this worked for me.
 
ngatts said:
I had this issue and what worked for me is re-editing the number in contacts. For some reason some numbers are saved without a space +1234567890 but when I re-enter the number it has the format +123 45 6789. The contacts app automatically adds the spaces. I tested before and after with multiple numbers and this worked for me.
Click to expand...
Worked for me too! Thanks
 
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