I want to reprogram some numbers on AT&T 822 (21213)

You've left out the first three letters in the model number if you can give me the complete model number I'll give you the instructions on how to reprogram it. That is if the control board will take the reprogramming and there's nothing wrong with it

Hello
You may need to first verify your messages center number.
Messaging > options > settings.Check the number.The Nokia center numbers in you area are the same.
To reprogram/reset to factory settings,save all of your important data into a computer or any other device.
Press *#7370#.This will be followed by a request for a default lockcode which is 12345.

Ken.

contact your provider. they could have towers down or have the wrong phone number listed. If you recently had your number changed then you need to have your phone reprogrammed. A lot of times it takes a manual reprogram to solve the problem.

DEALERSHIP HAS TO REPROGRAM THE NEW PCM.YOU NEED A GM SCANNER TO REPROGRAM NEW PCMS IN GM VECHICLES THE GM VECHICLES FROM 1996 UP TO 2011 HAS TO BE REPROGRAM AT DEALERSHIP, HOME MECHANIC CANT REPROGRAM IT.YOU NEED GM TECH 2 SCANNER.

If you key has a chip in it, you will probably have to get your ECM reprogrammed with the proper VIN, since it no longer matches the original VIN on your Vehicle. I don't think the dealer would program your keys to a mismatched VIN number, so more than likely you will need your ECM reprogrammed with the proper VIN. This will need to be taken to the Dodge Dealership to be fixed.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

On the set you wish to reprogram, press feature 00
press the button you want to program, enter in the phone number you want. if you want to program someones extension, after pressing the button you want to program press the right intercom and the persons extension number.

you can reprogram the esn on the fone easily by using cdma workshop

to program a speed dial button - <feature> *1 - select button / enter speed dial number / quit....you may have to reprogram each button.

if it has an internal smart card it is possible that dishnetwork has the wrong smart card number listed for that receiver on your account info, no there is no way to reprogram it