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Error code 21?

  1. djgingernips
    Cupcake Dec 3, 2015

    djgingernips , Dec 3, 2015 :
    Anytime I try and send a text message and I get an error "can't send with card 1, Error code 21". Also, I can not make calls, I get a automated message saying my service has been temporally suspended. I tryed rebooting and switching sim card spots, neither option fixed it. A google search brought up nothing and doesnt seem to be any information around what error 21 is, so any ideas on how to fix it?
     
    Last edited: Dec 3, 2015

    #1
    playboy7250 and kaibastian3 like this.
  2. Gaurav Rohilla
    Lollipop Dec 3, 2015


    #2
    pgidia likes this.
  3. djgingernips
    Cupcake Dec 3, 2015

    djgingernips , Dec 3, 2015 :
    I dont think thats the problem, because that has to do with how the numbers are stored in the phone. Thats why they can't send texts. I have no service at all, no calls or text, for anyone.....bad sim card?

    Also, I can not make calls, I get a automated message saying my service has been temporally suspended. I would call at&t but....ya know no ability to make calls. Our bill is paid and the other people on my same plan have service.

    It would help a lot if i could specifically find out what error 21 meant
     

    #3
  4. joesweeney413
    Jelly Bean Dec 14, 2015

    joesweeney413 , Dec 14, 2015 :
    Dial *#*#4636#*#*.

    You will get a menu, from that select Phone Information

    You will find a setting "SMSC"

    Refresh it then the problem should be resolved!

    Error 21:Short message transfer rejected is the official code
     

    #4
    TexasHoss and omkarnikam24 like this.
  5. Ayasin88
    Cupcake Dec 28, 2015

    Ayasin88 , Dec 28, 2015 :
    still
    i have OPT A2003

    and I have the same Issue can't send sms messages

    & I tried all of the above
     

    #5
  6. degroot.jc
    Cupcake Feb 24, 2016

    degroot.jc , Feb 24, 2016 :
    Same here, I have tried everything but I still get the same error message when I want to send a SMS
     

    #6
    kobe pepito likes this.
  7. kkunal7082
    Cupcake Mar 28, 2016


    #7
  8. verstuka
    Cupcake Apr 16, 2016

    verstuka , Apr 16, 2016 :
    Did you guys find a solution? Have the exact same problem and I've also tried all of the above.
     

    #8
  9. abhigaikwad90
    Cupcake Sep 23, 2016

    abhigaikwad90 , Sep 23, 2016 :
    Hi guys,

    i have done all the Troubleshooting and found a way out of this,

    Before sending the TEXT msg, please save the contact to your address book, with proper country code. i.e remove all blank spaces and also remove and add the country code again.

    your problem would be solved.

    P.S. please let me know if this helps.
     

    #9
  10. omkarnikam24
    Gingerbread Nov 8, 2016

    omkarnikam24 , Nov 8, 2016 :

    Worked perfectly on my Oneplus 3,
    Thanks !!!
     

    #10
    joesweeney413 likes this.
  11. synth0r
    Cupcake Nov 10, 2016

    synth0r , Nov 10, 2016 :
    my workaround is do the *#*#4636#*#* SMSC refresh thing and edit the sms center number and omit the international code and click update.
     

    #11
  12. joesweeney413
    Jelly Bean Nov 11, 2016


    #12
  13. SabiP_
    Cupcake Nov 15, 2016


    #13
  14. TexasHoss
    Cupcake Feb 20, 2017

    TexasHoss , Feb 20, 2017 :
    This worked for me also. Thank you!
     

    #14
  15. menismarco
    Cupcake Mar 19, 2017

    menismarco , Mar 19, 2017 :
    ok ! I have the same problem but depends on the size of the sms. With long ones i get the error 21 but with short ones is ok !
     

    #15
  16. A1546767964208
    Cupcake Jan 6, 2019

    A1546767964208 , Jan 6, 2019 :
    1546768312225.jpg

    Hi All,

    I have the same error "can't send messages with idea, error code 21" whenever I tried with any service provider number like 54325 Airtel DTH or 5676712 HDFC..

    I tried with SMSC update also but no luck...please help me if any other solution..I believe this is with Oneplus 6 only. On other phone it works.

    Regards
    Darshan P
     

    #16
  17. AbhilashKotha
    Cupcake Jan 19, 2019

    AbhilashKotha , Jan 19, 2019 :
    I have the same problem. Can someone help me. None of the above solutions worked for me. Mine is oneplOn 5t upgraded to android pie
     

    #17
  18. Ash_Arora
    Cupcake Apr 2, 2019

    Ash_Arora , Apr 2, 2019 :
    same is happening with me. I have one plus 5.
     

    #18
    samliyank5t likes this.
  19. Ash_Arora
    Cupcake Apr 2, 2019

    Ash_Arora , Apr 2, 2019 :
    tried this too after pressing last * screen got blank
     

    #19
    Y1561558323786 likes this.
  20. O1554219316988
    Cupcake Apr 2, 2019

    O1554219316988 , Apr 2, 2019 :
    I initially saved the number in my contacts in the format: 393935555555
    Couldn't send a text...
    I went into the contact, edited the number, putting a + in front of the number and it changed to the format: +39 393 555 5555.
    Problem solved...
     

    #20