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    A beautiful diy gsm jammer or mobile cell phone jammer schematic diagram for use only in GSM1900 with frequency from 1930 MHz to 1990 MHz. The GSM1900 mobile phone network is used by USA, Canada and most of the countries in South America.

    This cell phone jammer is not applicable for use in Europe, Middle East, nor Asia.
    The GSM jammer circuit could block mobile phone signals which works on GSM1900 band, also called DCS. For more cell phone jammers check the related posts.

    Mobile cellphone jammer circuit diagram

    cell phone jammer schematic

    ask a question

    37 Responses to "Cell Phone Jammer Circuit"

    1. Gregory Kerr says: on January 26, 2009 at 2:52 pm

      I would like to let you know that listing to someones phone calls is a breach of privicy anso the sue of mobile phone jamming may also land you in prison or a possable death sentence.

      • Omnidon says: on April 23, 2009 at 8:39 pm

        Death sentence huh…I seriously doubt that unless you are living 20 years ago in the USSR…are you? No the worse that can happen to you if you get caught ( the odds of that happening are slim to none unless you are STUPID and parade around waving it in your hand screaming at the top of your lungs what the hell it is…) is up to a 10,000 dollar fine from the FCC.

      • Hurricane says: on December 19, 2009 at 3:47 pm

        You sir are very very wrong, it is against telecommunication rules in many countries but all you will get is a very large fine, it is almost impossible to get caught if you are discreet.

        BTW, this does NOT listen to calls, it emits signals that make cell phones cease to work properly. A nice trick while watching a movie or waiting for a doctor.

    2. marius says: on January 26, 2009 at 9:41 pm

      :)) Sorry …
      This is not a device for listening someones phone calls, its just for blocking the cell phone signal.
      The mobile phones encrypt their signal and its hard and expensive to decrypt the signal from a mobile phone.

    3. hell boy says: on January 27, 2009 at 6:51 am

      mr gregory ur attitude suxx!!
      u must encourage the innovative ideas not discourage it!!!
      jammers r essential in exam halls,hospitals n schools.
      u must do a conscious check before acting.
      Best of luck dude!!!!

    4. jammers says: on February 4, 2009 at 1:13 pm

      I just picked up a jammer from cellphonejammer.cn and used it in the mall….OMG, so much fun!

      • srinivas says: on May 25, 2009 at 11:55 am

        hi dudue.dis is srinvias.am in need of cell or mobile jammers plz do send me a circiut diagram or schematics which can jam at a frequncy of 800 mhz of gsm mobiles

    5. Hi
      i am locking GSM FWT circuit diagram that can suport PABX,if you can help so please reply

      • Hi ayaz, i need jammers circuit diagram. can you help me?
        sorry for my english. Here in my country , use GSM in the four bands. I dont remember the freq.
        thks and regards.


    6. sandesh says: on February 23, 2009 at 6:26 am

      i need description of circuit diagram,….
      i also want to know that, will this circuit jam the signal in inda….

      • I am also working on a cell phone jammer.If you have succeeded in all this work;please share it with me.I will be great ful…
        my e mail add is nomino_747 @ hotmail.com

    7. perplexed6 says: on February 24, 2009 at 4:42 am

      I needed a schematic for dual band GSM 900/1800… what are the changes i might have to make in this?

    8. kamran says: on March 31, 2009 at 5:45 am

      its a very amazing ckt….if any body has scematic of mobil tacker and capture of calls ckt then plz help me .. thanks

    9. wirelessphonejammer says: on May 6, 2009 at 3:06 am

      almost seven years after the first report about cell phone jammer,now cell phone jammer become commen in lots of countries and it is known by more and more persons.you can find this kind of item by google just type cell phone jammer,you will find the manufacture just like wirelessphonejammer.com ,the price become lower and lower.
      Though in some countries,the product is illegal,its existance prove it is needed by some persons

    10. Adebayo says: on June 22, 2009 at 11:14 am

      pls,am ask to construct and design freq.wireless network multi-jammer.pls i need suitable write up on it and how to go about the design.thanks.

      • hello friend. i have info how to construct and design. this is my project in my university. here is my mail address
        contact me by email as soon as possible

    11. SectechBiz says: on July 15, 2009 at 11:14 am

      If some one need cell phone jammers then contact us , we provide the such type of security solution in worldwide

    12. Aslan says: on July 25, 2009 at 5:57 am

      Is this equipment meant to block a users cellphone signal when someone is trying to introduce a connection to listen onto the device being used. If so does it block major companys like verizon, at&t, t-mobile and etc. Or is it meant to block singnals coming from certain models of phone? Is so what models? i need more information about it. Cap_Com@live.com

      • @Aslan, no, GSM is a standard of the cell phone industry. If I’m reading all of this info correctly, it blocks all phones that use the GSM standard.

        Person A does not use a GSM-type phone and his carrier does not use it, they use some older, archaic type of communication.

        Person B uses a GSM-enabled phone.
        most people fall under this category.

        Person C has a high tech smart phone, using multiple systems to communicate.

        Use this jammer and people on the 1930-1990 MHz range, or GSM, (not 100$ on this) have static/noise played on their ENCRYPTED signal frequency. This noise combines with the actual signal to make a jumbled up signal. The phone cannot decrypt the signal properly if there are bits and bytes that dont fit, aka a corrupted signal. Since the phone can’t decrypt this, it tells the user it has no signal; effectively jamming the service.

        p.s. the GSM standard covers a few different frequency ranges, and the one most popular in the U.S. is the 1900-1990 MHz band. This jammer works best in the U.S. as it targets this range of frequencies.

        I hope this helps. =D

    13. It’s true! I tried listening to someone’s phone call and the FCC came around with a their own SWAT team and killed me. But when I got to heaven God told me how much he hates cellulars and sent me back to share jammers with the world. Who am I to say no to God?

    14. LOHITH says: on August 31, 2009 at 11:53 am

      this is a woderfull circuit i need full details about this . i want compleat details of this &i want this circuit b oprated in india plz send about it i dont no at wat gsm using here

    15. Arsalan Haider says: on October 3, 2009 at 10:06 pm

      hi frends
      i want to make a mini mobile jammer so please help me
      i am a student of Electronics please inform me what should i do ,,,,,
      here is my no please u can inform me on my cell

    16. AJENDRA says: on October 29, 2009 at 5:59 am

      hi i want this project plz help me on coolajendradabhi@gmail.com or +919510079083

    17. Amadi Ichebadu says: on November 19, 2009 at 9:24 am

      pls help me i want to build a dispenser that can dispens water and ice cream and tea pls my num is +2347030278060

    18. sreeja says: on December 4, 2009 at 5:32 pm

      y cant this mobile jammer ‘ll not block CDMA…what changes should we make for that in the circuit

    19. jena He says: on December 25, 2009 at 5:59 am

      we supply all kinds of mobile signal booster/repeater and jammer with high quality , pls feel free to visit our website http://www.asicon.net and http://www.dzxcon.com .

      Email: jena@dzxcon.com
      Mobile: 0086-15818561923

    20. Hello, This is fortune chou from Tangreat,china

      if you are interested in cellphon jammers, pls contact me anytime.

      looking forward to hearing from you soon.

      Best regards
      Shenzhen Tangreat Technology,co.,Ltd

      Tel: 0086-755-33611881
      Mobile: 0086-13670292315
      Fax: 0086-755-82527821
      Skype: tangreat0909
      MSN: tangreat09@hotmail.com

    21. Hello, Thank you very much for your patience .

      If you are interested in cell phone jammer or need more details , you can contact me anytime.www.tangreat.com

      Fortune chou

      Tel: 0086-755-33611881
      Mobile: 0086-13670292315

      • hello sir,
        sir i need cellur phone jammer circuit diagram. i live in pakistan. In pakistan the frequency use with respect i need that circuit diagram

    22. мaлышyля says: on January 10, 2010 at 10:01 pm

      Так ведь без недостатков и достоинства незаметны :)

    23. jaspartap singh says: on February 23, 2010 at 10:51 am

      hello,i want this project,i want to build this jammer.kindly send its detail to jaspratapsingh@gmail.com.is it wokable in india….

    24. Ris_ilient@yahoo.com says: on February 25, 2010 at 2:34 am

      You are all under arrest! Me and The Mothers of America are gunna shut this site down! Just kidding. This is a cool site! Thanks!

    Comments are closed.