Nintendo upgrade DSi/DSiLL/DSiXL system to V1.4.4 version on March 23th. Many are locked. If your R4 card are using old firmware, and there is no firmware update, please don't update your DSi system. Some famous flashcard already break DSi V1.4.4 system in very short time. For these cards, users can download mentioned patch to fix the compatibility problem.
and card (r4i-sdhc.com)
card from Acekard.com.
from M3adapter.com.
and R4iTT 3DS card from r4itt.net.
card from n3dstt.com.
card made by r4ids.cn.
card made by r4ids.com.
from supercard.sc.
card from r4i-gold.com.
from r4isdhc.com