Whatsapp & Blackberry


September 26, 2012 by globz

If you don’t know by now, Whatsapp is NOT secure and lets face it in 2012 security by obscurity is long overdue.

I know a lot of you wanted to know how to get the “udid” for the Blackberry client so I did some testing with my Blackberry 9700/os v5.0.0.862 and here’s how you get it :

  • Get IMEI :
  • Reverse IMEI :
  • create MD5 hash from Reverse IMEI (remove the “.” or “-” from your IMEI when creating MD5 hash)

You can test your “udid” with the following url :


I did a test with my friend and she received the message.

Please fix your code!

useful links related to this post :



It does not seems to work for everyone

This is what I am using for this test :

Account created on september 11 2012
Blackberry 9700 / os v5.0.0.862
Whatsapp v2.8.1914


  1. avatar Gio says:

    Hi, thanks for the nice info.

    Could you please share the source used for this experiment?


  2. avatar globz says:


    This is the source I am using for this experiment


    The source is currently down but I am sure you can find a mirror ;)

  3. avatar Gio says:

    I got the source, apparently is sending the message but I don’t get anything, is it still working for you?


  4. avatar globz says:

    Yes its still working for me, I know the sockets usage in this API are very basic, it might be the problem.

  5. avatar Abhiram says:


    Whats a API? and if its a program can u please upload it for us to download cause we are not able to find it on the net :(

    Thanks in advance :)

  6. avatar globz says:

    You will have to search on github to find a mirror of the original source code.

    We are using the API to communicate with whatsapp server.

    If you can’t find it, there’s a web client based on the API, so you won’t have to run the source code yourself.

    link -> http://whatsapp.filshmedia.net/

  7. avatar d3vilkin says:


  8. avatar Judith Ann Mcdermott says:

    Very informative post. Thanks for taking the time to share your view with us.

  9. avatar Jeremias says:

    Much informative and useful article… I like it personally…

  10. avatar crork says:

    A big thank you for your blog article.Thanks Again. Cool.

  11. avatar Arturo Torres Sánchez says:

    My phone is CDMA, and so it doesn’t have IMEI, but MEID. I tested it reversing my MEID but it doesn’t work.

  12. avatar droopy says:

    If you want more info contact me, i have fully reversed whatsapp.

  13. avatar Hc Devel says:

    Does it still work. I ask because I’m currently have prolems with that. Means reversing just to change the order of the different block (for example from 12:34:56 to 56:34:12) or does it mean to read it from the end (65:43:21)?

    • avatar globz says:

      Hi Hc Devel,

      Just do it in python with the following commands :

      >>> rev = IMEI[::-1]
      >>> rev

  14. avatar whatsapp says:

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    could get a captcha plugin for my comment form? I’m using the same blog platform as yours and I’m having trouble
    finding one? Thanks a lot!

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