3DS firmware updated to V3.0.0-6, looks like do not block flashcard
You may have noticed, if you go onto e-shop, you will get a message that you should update your 3DS firmware to V3.0.0-6. Well, 3DS new firmware V3.0.0-6 has been released via e-shop, and currently only for V3.0.0-6 E and V3.0.0-6 U, i think this update is mainly for Swapnote, and looks like it won't affect the flashcards. Until now, many flashcards have been confirmed still working on this new firmware, including Acekard 2i, DStwo, r4i gold (r4ids.cn) and ace3ds...... let's take a look.
news from the official site
Version 3.0.0-6U available via wireless Internet connection includes the following improvements:
Date Available: 12/21/2011
System stability improvements and other adjustments
Further improvements to overall system stability and other minor adjustments have been made to enhance the user experience.
Working cards confirmed by digitopz
R4i gold (r4ids.cn)
Feel free to update your 3DS if you use those cards.