The following Backup Units have been updated and have downloadable updates to support the 1.4.2 firmware:

• AceKard 2i – AK2i
• M3i Zero Sakura
• SuperCard DSTWO SCDS2
• R4i SDHC
• R4i 3DS

So we’ve got you covered for this update, but in the future, do not update your firmware! Unless of course you don’t mind losing the functionality of your precious flash cart. And if you’ve got one of those old clunker cards (oh the shame!) now is the perfect time to get one of the newest and best cards.

The all new SuperCard DSTWO is a mash up between the original DSONE and the hardware that was found in the iPlayer multimedia player. This all new device is compatible with DS, NDS and DSi. That means you’re going to have a cart on your hands that can play both Nintendo DS and Game Boy Advance games without any additional hardware. The SuperCard DSTWO is available for order now at ConsoleSource.com for as low as $39.95.

The Supercard DSTWO Card for Nintendo DS, DS Lite, DSi & DSi XL is a high-end slot-1 flash cart solution that allows you to launch games, run applications and play media directly from the device. Simply place your files onto either a micro SD or SDHC memory card (sold separately), insert the micro SD into your Supercard DSTWO, your cart into your DS, and turn the system on. Playing games and media has never been easier!

The Supercard DSTWO, with its beautiful Evolution (EOS) operating system and a powerful on-board processor offers unique and exciting features that you won’t find anywhere else. Features such as full GBA emulation, a powerful new GUI, a real-time guide, an integrated auto-patch database, as well as being one of the few flash carts that allows users to upgrade the core firmware. If you’re in the market for a sleek and feature-rich flash cart for the Nintendo DS, DS Lite, DSi or DSi XL, the Supercard DSTWO is the one for you.

• RealTime Functions: RealTime Save, RealTime Game Guide(txt,bmp,jpg) & RealTime Cheat. (More stable, more easy to use, cheat code compatible with R4 and DSTT now)
• Multi Saves (Up to 4 slot), Easy to backup and restore saves. 
• Unlimited MicroSD storage space support. SDHC support. FAT or FAT32.
• Multiple languages (English, Simplified Chinese, Traditional Chinese, French, Italian, Korean, Japanese, Spanish)
• Built-in GBA & SNES Emulator.
• Action Slow Motion (4 levels,).
• File Management System (Copy, Paste, Cut and Delete, long file name support).9. eBook (BMP, JPEG, JPG, PNG, TIF, GIF, TXT, PDF).
• Perfect support for long file names;
• Real-time save slot increase to 4 slots. (Exclusive built-in automatic detection of 3D game engine technology, stability, greatly enhanced);
• Give up cheat-code slow motion game play method, improved use of CPU to do operations, “precise control of CPU speed” Achieving the action slowed down, stability / compatibility and better.
• Real-Time Game Guide will support txt formats without conversion, beautify the font is more beautiful;
• New UI interface design. Easier-to-use.
• Advanced multimedia playback: native DivX/XviD playback as well as other major formats, similar to the iPlayer.