This update file is to resolve the issue of AK2i can only be run on DSi which set language to English. You do not need to update if you're using JAP DSi. How to use 1.Set the language of your DSi to English. 2.Copy ak2ifw_update_hw44.nds to your MicorSD card and put it to AK2i. 3.Launch AK2i and select to run the update file. 4.Follow the instructions of the update program to finish update. Notice This update file can be only used on AK2i which has HWID "44". You can press "start" then select "help" in AK's menu to check your HWID. There're two HWID of AK2i. The update file for HWID "81" can be found at www.acekard.com/download.php#ak2. You can find the update file at www.acekard.com/download.php#ak2.