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- T-CARD, GERMAN TELEKOM'S CALLING CARD
- by GemFire/THC
- I think, it was a year ago, when I first heard about a new calling card,
- this time by German Telekom. The history of calling card fraud is very long,
- because AT&T, MCi, Sprint and other phone companies made it possible for many
- hackers and phreakers all over the world to make free phone calls very easy.
- Now German Telekom offers the same service?! I think many guys tried to hack
- those new cards, but I've never heard of a big success. There are several
- different types of T-Cards, one is called T-CARD25 which is a pre-paid card
- with an amount of 25 DM (18 $) - the other one is a charge card.
- The cardholder will get a bill every month. On this bill all called phone
- numbers are listed, but with XXX instead of the last three digits.
- There are three possibilities to pay for your card: Together with your normal
- phone bill, with a credit card or you give the permission, that Telekom will
- take it from your bank account. In my new school, we must work in a local
- company for a few weeks, to get the feeling of the real live. I looked up the
- list and found out, that I must work for German Telekom. With an evil grin
- I went home... There were a lot of things to do at Telekom, one fine thing
- was, that I was able to make free calls, without having problems. There's
- a big room there filled with ISDN phones from where you can make private calls.
- One day, I called the Telekom Business Service and asked some questions.
- The operator there noticed my Telekom internal Caller ID and she started
- talking with me about many things. I got the answers to some difficult
- questions, and she gave me an internal number for detailed technical
- informations. "Don't give out this number to customers!" she warned me and
- again I left the room with an evil grin on my face. One other day, an old
- guy asked if there's is somebody who knows about T-Cards. He quickly noticed
- that I'm more intelligent than the average Telko pig and an hour later I found
- myself in a small room with a phone and a list full of Telekom internal calling
- card numbers. I became an official T-Card System Tester. We tried a lot of
- things and in one test, Telekom wanted to find out how many callers can call
- the computer at the same time, before it will shut down. I made calls to the
- whole world, and more and more testers all over the country invaded the system.
- The automated voice talked slower, simple options took over one minute to
- complete. Again, I made some calls and checked the account information.
- I noticed that the last calls weren't billed. Interesting...
- The internal cards were interesting, too. They acted like charge cards, but
- they had a 50 DM (36 $) limit per month. The card computer itself is very
- intelligent, it is able to learn the habits of a customer, e.g. which countries
- he calls normally and how long he's talking. A further security measure is,
- that after three wrong pin entries, the card will be locked for further calls
- until the owner of the card calls the operator. Every customer can choose
- a password/passphrase for such actions, because the operator must be sure
- that the caller is really the cardholder. Sometimes they even make a callback
- verification. You can use T-Cards in over 50 countries. I just tell you the
- numbers of the most important countries.
- Germany 0130-0222
- Australia (Telstra) 1800-881-490
- Australia (Optus) 008-5511-49
- France 19-(wait for second dialtone)-0049
- Great Britain (BT) 0-800-89-0049
- Great Britain (Mercury) 0-500-89-0049
- Hawaii 1-800-865-0049
- Hongkong 800-0049
- Irland 1-800-55-0049
- Israel 177-490-2727
- Italia 172-0049
- Japan (KDD) 0039-491
- Japan (IDC) 0066-55-449
- Canada 1-800-465-0049
- Netherlands 06-022-0049
- Austria 022-903-049
- Sweden 020-799-049
- Spain 900-99-0049
- South Africa 0800-99-0049
- USA (AT&T) 1-800-292-0049
- USA (MCi) 1-800-766-0049
- USA (US-Sprint) 1-800-927-0049
- How to use a hacked card?
- 1. Dial the access number
- 2. Press 1 for T-Card Service (if you're not calling from Germany)
- 3. Choose language: Press 1 for German, 2 for English and 3 for French
- 4. Enter Cardnumber and PIN then press #
- 5. Enter the number you wish to call dial 00+country code+number and press #
- Instead of dialing a number you can access a submenu with *1#
- Listen to the voice what you can do there.
- Charge cards have the following format 8XXX XXXX XXXX + PIN (4 digits)
- Pre-paid card have no PIN number, which makes them easy to hack, as if you
- know a valid pre-paid card number you can easily guess new numbers.
- They're not in sequence, but if 8214 1234 1234 is a valid card you can guess
- some valid cards easy. But 18 $ is not very much, so concentrate hacking
- the real ones. They came in two envelopes and the second letter arrives
- about one or two days later. One letter contains the card, and the other the
- PIN number. This should make stealing difficult, but wait... My card arrived
- in July 95 and the temporary pin was 9507. Got the point?
- I know it's difficult to hack one of these card, but if you have one, you'll
- have much phun. I'm abusing one of the test cards for 6 month now. Customer
- cards will often work a whole month. I think that's worth it.
- Have phun!
- GemFire/THC
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