The r4ishdc team has release the kernel 1.62b to compitablity for 3ds v6.2.0.
Here is the step how to upgrade your buy r4isdhc Dual-core to 1.62b;
1) download the kernel 1.62b from http://down4.nds9.cn/r4isdhc-white/r4isdhc1.62.rar
download the path file fwUpgrade_v6.20.rar from
you will get the zip file:
you will get like below:
2)Format your micro sd card and copy the files to the root of your sd card.
4)unzip the fwupdate_v6.20.rar
5)copy the fwUpdate_V6.20.nds to the root dir of micro sd card.
6)push the flashcard into the 3ds.Press Power on
other step is same like before.
enjoy your happy games!