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How to solve sms error 21 in airtel, ideal, reliance, vodafone and jio

I have seen that some of guys reporting that they can't send message from their mobile. While trying to send sms they got a error saying error 21.
I am not sure that this method will work for all of you, but you should try this once.
Try this step by step:-

1. Go to phone's dialer and dial *#*#4636#*#*

2. This will open a new window. Here tap on phone information.


2. Now scroll down for SMSC.


4. Here tap on refresh.


5. Now your SMS service center number will appears , just check them if they are ok, than tap on update.

That's it. You have done. I hope this will fix your problem. If still you are facing problem let me know in comments section i will help you.

Comments

  1. Replies
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  2. No it's not working for me as well

    ReplyDelete
  3. This comment has been removed by the author.

    ReplyDelete
  4. I was having the same problem. It was resolved by recharge of some talk time. Now all mobile calls are free but to send SMS for any special number you need to recharge with talk time say like Rs. 10. Then try to send the SMS. It will work.

    ReplyDelete
    Replies
    1. Thanks for the suggestion. It also worked for me after recharging with a minimum balance of Rs 10.

      Delete
    2. Your suggestion worked. Thank you.

      Delete
    3. The suggestion of recharging your no with Rs 10 actually worked for me
      Thank you for the suggestion!

      Delete
  5. It is not working with this method .

    ReplyDelete
  6. I am unable to send message from idea no. I have tried all the methods but nothing is working ..what to do?

    ReplyDelete
  7. Not solve , I am unable to send message from Vodafone . I have tried all the methods but nothing is working ..what to do?

    ReplyDelete
  8. How To Solve Sms Error 21 In Airtel, Ideal, Reliance, Vodafone And Jio >>>>> Download Now

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    How To Solve Sms Error 21 In Airtel, Ideal, Reliance, Vodafone And Jio >>>>> Download LINK

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    ReplyDelete
  9. RECHARGE THE PHONE WITH SOME TALKTIME TO BE ABLE TO SEND MESSAGES TO SPECIAL NUMBERS. THE ABOVE SYSTEM MENTIONED IS INCORRECT AND DOESNT WORK

    ReplyDelete

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