Here is an official announcement by Team R4 at their official chinese forum
Translate by google:
In order to protect the original R4 majority of the basic interests of users, now R4 against the proliferation of counterfeit cards, R4 group will be on September 15 after the program on the fake cards blocked. As a number of technology is not yet mature reasons, if the use of counterfeit cards in this program, the DS machines could lead to serious consequences, such as floor tiles changed, and the original R4 does not exist the problem. Members of this audience in order to protect their own interests, R4 card before buying be sure to clearly identify the authenticity of cassette (Recognition Xianhou text), if the use of counterfeit cards lead to damage to host, card users to identify the goods Unscrupulous merchants responsible for the sale, R4 group this liability.
Important point:
1. After 15 September, Team R4 will do something for the fake card, original program(firmware) with Fake R4 may damage your DS machine (brick), original R4 will have no problem with this program.
2. Make sure you have buy a original R4 (see photo below), if you brick your DS with fake R4, please go ask the selling shop and Team R4 will not admitted this liability.
Here is the photo from official Team R4
Fake at left, original at right, look at the blue and red circle for different
original at left, fake at right,
original at left, fake at right, last original production code is 0817#
Fake at left, two original at right. original have step whick we can identify at red circle
QUOTE said:R4 ?? ??????
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Translate by google:
In order to protect the original R4 majority of the basic interests of users, now R4 against the proliferation of counterfeit cards, R4 group will be on September 15 after the program on the fake cards blocked. As a number of technology is not yet mature reasons, if the use of counterfeit cards in this program, the DS machines could lead to serious consequences, such as floor tiles changed, and the original R4 does not exist the problem. Members of this audience in order to protect their own interests, R4 card before buying be sure to clearly identify the authenticity of cassette (Recognition Xianhou text), if the use of counterfeit cards lead to damage to host, card users to identify the goods Unscrupulous merchants responsible for the sale, R4 group this liability.
Important point:
1. After 15 September, Team R4 will do something for the fake card, original program(firmware) with Fake R4 may damage your DS machine (brick), original R4 will have no problem with this program.
2. Make sure you have buy a original R4 (see photo below), if you brick your DS with fake R4, please go ask the selling shop and Team R4 will not admitted this liability.
Here is the photo from official Team R4
Fake at left, original at right, look at the blue and red circle for different
original at left, fake at right,
original at left, fake at right, last original production code is 0817#
Fake at left, two original at right. original have step whick we can identify at red circle