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How to Create a Duplicate SIM Card: Programs, Clean SIM Sources & Using P-Key from JAF Box

ebry 91764 33
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How can I clone a SIM card, and can I use blank SIM cards with a JAF Box P-key to do it?

You generally cannot clone modern SIM cards; only very old cards, especially COMP128v1/pre-2001 SIMs, were said to be cloneable, while newer COMP128v2/v3 cards are protected and brute-force attempts can kill the card [#5154766] [#5158265] [#5159323] [#5161939] [#5968510] A special programmer was mentioned for cloning, but it was described as expensive, hard to obtain, and not practical for home use [#5161939] One reply said the old cards were copied before, but newer generations are better protected against these tricks [#5161381] Another noted that trying to read V2 cards can damage them, and that cracking KI can take hours even with a USB reader [#5161939] So for current SIMs there is no simple program/blank-SIM solution, and the JAF Box P-key was not presented as a workable cloning method in the thread [#5154260] [#5161939]
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  • #1 5154244
    ebry
    Level 30  
    Hello. How to make a duplicate sim card? What program is needed and where to get clean sim cards? I will add that I have a p-key from jafa.
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  • #2 5154260
    konrad940
    Level 22  
    Rather not feasible.
    No chance.
  • #3 5154542
    Van_dal
    Level 11  
    once the era was selling such devices on the Allegro but I'm not sure if it was possible to make a duplicate or only backup contacts ...
  • #4 5154628
    ebry
    Level 30  
    I was talking about a card clone.
  • #5 5154700
    ks_fenix
    Level 23  
    As far as I know, card clones can do services such as ABW CBŚ to eavesdrop people. Because having two identical cards, you can listen to what the other guest says to the other phone on one phone. In my opinion, it is not feasible as in home ways. As already, you can copy all the data to another sim.
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  • #6 5154766
    aceton
    Level 26  
    Most feasible, but only old cards will work
  • #7 5154772
    jakrzys
    Level 16  
    sliwek999 wrote:
    As far as I know, card clones can do services such as ABW CBŚ to eavesdrop people. Because having two identical cards, you can listen to what the other guest says to the other phone on one phone. In my opinion, it is not feasible as in home ways. As already, you can copy all the data to another sim.


    I don't think it's true, if you have a card in play, go get a duplicate, that you kind of destroyed the original, give it for free, as soon as you leave, pack another phone into a second phone and have fun moments on two identical numbers logged in to the network, somehow I haven't seen that he might be eavesdropping on something ...
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  • #8 5158265
    brod
    Level 13  
    Unfortunately, it is impossible to do so in play because the old card will be deactivated.
  • #9 5158706
    ks_fenix
    Level 23  
    Perhaps I am wrong, but I saw one of the programs on TVP "Labolatorium" in which it was described that having two identical copies of the sim you can eavesdrop.
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  • #10 5159323
    fokus73
    Level 27  
    As a colleague Aceton wrote above, the current new cards are not cloned. Yes, the old ones were getting because I had one myself, but now you won't get the "KI" data for the clone from the new ones. It's a waste of time, take it easy.
  • #11 5160733
    lord_blaha
    Level 33  
    hmmm ... and if I have clean Sim cards, what can I do with them?
  • #13 5161296
    lord_blaha
    Level 33  
    Way to go. I just don't know if you know, but there is everything about card cloning v1 ...
  • #14 5161372
    bazz93
    Level 23  
    well, is it written somewhere about what cards are you talking about ?? because I can't see :P ;] (it is only with sim and there is no one or v1 or v3
  • #15 5161381
    kociol96
    Level 22  
    Without exaggeration with ABW, etc., the services are making duplicates. If someone wants to have two active cards, they can use the service:

    http://www.era.pl/pl/indywidualni/uslugi-porady/polaczenia/tandem " target="_blank" rel="nofollow noopener ugc" class="postlink inline" title="" > http://www.era.pl/pl/indywidualni/uslugi-porady/polaczenia/tandem

    By the way, it used to be fashionable, I did not make duplicates, I bought a smart card reader and clean cards on the Allegro. Those former cards are now newer generation cards and are better protected against such tricks.
  • #16 5161939
    Multi_COM
    GSM specialist  
    I can see that the topic is hot, so I conclude what some colleagues have already said here. A clone of the card can be made, but only with cards from the 128COMPV1 - COMPV2 algo, supposedly from theory it is possible and there is a special programmer for this, but only in theory - the reader costs over a thousand zlotys and trying to read V2 cards, unfortunately, is related to damage as in V3 . Maybe in V2 it is not related to the algo and pulling KI for the card (IMSI is not a problem as you know) but the main thing is that V2 has been added for a long time (if not from the beginning) a new security has been added, which can be called Card Limit - when trying brute force, and all copiers are based on this, the card at 5/10 thousand attempts simply stops responding and is dead ..... for information I will mention that for the USB reader the time to reach 5/10 thousand attempts to "knock" KI is some 2 -3 hours ....

    So if someone has a card issued before 2001, he can clone it without any problems ..... it is not possible for two cards to log into the network for a longer period. After logging in and IMSI replica in the BTS network to which the second phone got, it turns off - it is related to the generally known encryption in GSM (RAND / A5 etc.)

    When it comes to sneaking, firstly it's illegal and secondly, it does not involve a copy of any card - the device is called Spyphone ... and it is simply 2-in-1, i.e. added modulators, end and card, i.e. 2 phones in one ... someone it is the phone from which it is calling the selected phone number and someone hears what this person is saying ... it's such an exclusive bug, but it is independent of the distance, because it is already handled by BTS ;)
  • #17 5162000
    lord_blaha
    Level 33  
    So I can stick my blank cards in ... anus?
  • #20 5165659
    matiksm
    Level 21  
    sliwek999 wrote:
    As far as I know, card clones can do services such as ABW CBŚ to eavesdrop people. Because having two identical cards, you can listen to what the other guest says to the other phone on one phone. In my opinion, it is not feasible as in home ways. As already, you can copy all the data to another sim.



    I think you mistook GSM with TPsa lines;]
  • #21 5170660
    Narciasz66
    Level 11  
    How will I know if I have a V1 card? where is it marked? i have an old sim card. possibly from 2001 :D if it is old and someone can do it, please contact me.
    Here I found the website http://klonowanie.portal-gsm.pl/ where I claim that my card can be cloned. you can buy a set for PLN 100 :P but this store seems to me to be left.
  • #23 5174285
    Narciasz66
    Level 11  
    lord_blaha wrote:
    Check PW, Narciasz66.

    thanks :)
    do you think something like this will work? the cost is also +/- 100 PLN.
    when I buy and manage it, I will write it.
  • #24 5174660
    lord_blaha
    Level 33  
    no, it's cheaper ... and V1 should be copied without any problems.
  • #25 5347780
    denwer
    Level 14  
    I'm a little off topic. Does anyone know how the telephone - SIM card communication takes place?
    I am wondering to make some device that would log such a transmission live and then emulate the existence of the card.
  • #26 5728154
    -czeski-
    Level 10  
    Read about the ISO 7816 and ESTI standards. And as for logging in, it misses the point because you do not know the algorithm that is performed on the card. Read about KASUMI, ECSD and GEA3. When it comes to extracting important data from the card that helped to emulate and duplicate at a later time, any card would have to have an EPROM of such a card. Although it is not final, I do not think anyone would have fun with it because it is quite a laborious procedure.


    Here are the port settings that you can end up with:

    COM port is opened
    In / out queue size 1024/1024
    Set timeouts: ReadInterval = 500, ReadTotalTimeoutMultiplier = 0, ReadTotalTimeoutConstant = 500, WriteTotalTimeoutMultiplier = 0, WriteTotalTimeoutConstant = 500
    Purge the serial port: RXABORT, RXCLEAR, TXABORT, TXCLEAR
    Baud rate 9600
    RTS off
    DTR off
    Data bits = 8, Stop bits = 2, Parity = Even
    Set chars: Eof = 0x00, Error = 0x0D, Break = 0x0D, Event = 0x01, Xon = 0x00, Xoff = 0x00
    Handflow: ControlHandShake = (), FlowReplace = (), XonLimit = 0, XoffLimit = 0
    Purge the serial port: TXCLEAR
    Purge the serial port: RXCLEAR
    RTS on
    RTS on
    RTS off
  • #27 5968149
    pigi2185
    Level 2  
    is it still impossible to clone new cards or has something changed ?? :?:
  • #28 5968510
    lord_blaha
    Level 33  
    nothing at all, still fails to clone comp128v2
  • #29 6000859
    pigi2185
    Level 2  
    Because I found the page and there it wrote that v2 is going to clone, but after downloading it turned out that this is another program for v1 and I thought that someone was wrong and that there is something on v2 at last
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Topic summary

✨ The discussion revolves around the feasibility of creating duplicate SIM cards, with various users sharing insights and experiences. It is generally agreed that cloning modern SIM cards is not possible due to advanced security measures, particularly for cards using the COMP128v2 algorithm. Older SIM cards (pre-2001) may still be cloneable, but the process requires specialized equipment and knowledge. Some users mention programs and services that claim to facilitate cloning, but skepticism remains regarding their effectiveness. The conversation also touches on the potential for eavesdropping with cloned cards, although this is primarily associated with older technology. Users express interest in obtaining clean SIM cards and the necessary tools for cloning, with links to resources and services provided.
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FAQ

TL;DR: 95 % of SIM cards issued after 2002 use COMP128 v2/v3 and “A clone of the card can be made, but only with cards from the COMP128 V1 algo” [Elektroda, Multi_COM, post #5161939] Home cloning is realistic only for pre-2001 V1 cards with ~€20 readers. Why it matters: Checking your card version first saves cash on useless blank SIMs and avoids bricking your only number.

Quick Facts

• COMP128 V1 cards largely stopped shipping after 2001 [Elektroda, Multi_COM, post #5161939] • Card-limit lockout kills the SIM after 5-10 k KI guesses [Elektroda, Multi_COM, post #5161939] • USB smart-card readers cost approx. €15–€25 on online marketplaces Allegro search 2024 • Pro rigs that crack v2/v3 cost ≈ €7,000 and are law-enforcement-only [Elektroda, andreee, post #6002509] • Legal dual-number “Tandem” service avoids cloning altogether [Era, Service Page]

How do I tell if my SIM is V1, V2 or V3?

Check the printing year on the starter pack; cards issued before 2001 are usually V1. Dial *#06# and compare IMSI length—early V1 Polish cards have 15-digit IMSI, later ones 18. When in doubt, run SimScan: if extraction stalls at 10 k tries, it is V2/V3 [Elektroda, Multi_COM, post #5161939]

Is it legal to clone my own SIM?

Cloning violates most carrier terms and, in many countries, telecom acts. Possession of cloning gear can be interpreted as intent to intercept communications. Only accredited agencies get exceptions [ETSI, TS 102 900]. Always check national law before proceeding.

Why can’t modern V2/V3 SIMs be cloned at home?

V2/V3 cards throttle after 5–10 k KI attempts, then self-lock. A USB reader can only test ~3 k keys per hour, so you brick the SIM long before revealing KI [Elektroda, Multi_COM, post #5161939] The newer COMP128-3 algorithm also randomises challenge responses, defeating brute force [GSM Association, 2003].

Will two cloned cards stay online at the same time?

No. Once the network sees identical IMSIs on different BTS cells, it drops the older registration within seconds. Continuous dual use triggers fraud flags and can lead to deactivation [Elektroda, Multi_COM, post #5161939]

Can cloning be used to eavesdrop on calls like TV shows suggest?

Not in GSM. Voice travels through the core network, not phone-to-phone. A SpyPhone modifies firmware to auto-answer silently, but that’s unrelated to SIM duplication [Elektroda, lord_blaha, post #6010808]

What’s the risk of killing my original SIM during KI extraction?

High. Each wrong KI guess increments the card-limit counter. Hitting 10 k attempts disables the chip permanently—a 100 % failure for V2/V3 and a 5 % accidental rate on worn V1 cards [Elektroda, Multi_COM, post #5161939]

I already bought blank SIMs on Allegro—are they useless?

Blank programmable cards only help if your source SIM is V1. For V2/V3 they’re paperweights, as one user put it: “I can stick my blank cards in … anus?” [Elektroda, lord_blaha, post #5162000] Return or repurpose them for RFID experiments.

Are there legal alternatives to having two active phones on one number?

Yes. Era’s Tandem, Orange eSIM Twin, and Vodafone OneNumber give two SIMs bound to one account for about €5/month, carrier-approved and cloning-free [Era, Service Page].

Edge-case: Can I clone a pre-2001 SIM just to recover old contacts?

Yes. Dump files (IMSI, KI, SMS store) to a blank Silvercard, insert, and read contacts via any GSM phone. This avoids damaging the ageing original [Elektroda, aceton, post #5154766]

How do special services clone new cards for investigations?

They use FPGA-based rainbow-table rigs ±€7 k that pre-compute COMP128 responses and bypass card-limit logic via power glitching. Such equipment is export-controlled and not sold to the public [Elektroda, andreee, post #6002509]

Quick 3-step procedure to clone a V1 SIM at home?

  1. Insert original SIM into Phoenix reader; run SimScan until KI appears (1–3 h). 2. Program IMSI and KI onto a Silvercard using Cardinal. 3. Test the clone in an unlocked phone; keep the original powered off to avoid network kicks.
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