Here is the news from ak2i official site Do Not Update your DSi to 1.4.4 Please do not update your DSi to 1.4.4 if your console prompt you to update. We'll release DSi 1.4.4 update file for AK2i ASAP. Please be patient. Thanks. Here is the news from r4i sdhc site Do Not Update your DSi to 1.4.4  [2012-03-26] Please do not update your DSi to 1.4.4 if your console prompt you to update. We'll release DSi 1.4.4 update file for R4i-SDHC ASAP. Please be patient. Thanks. Until now. these cards have released the update patch for DSI V1.44 1. r4i gold (r4ids.cn, wood firmware) 2. DStwo 3. iSmart MM
The R4i-sdhc marked with 3DS can support the NDSi V1.44, please update the firmware to R4I 3ds V1.55b(April 1st). r4i sdhc 3ds 1.55n kernel download New R4i SDHC V1.55 fixed the compatibility between DSi V1.4.4 system and R4i SDHC 3DS card.