How to upgrade R4iTT card

Old R4iTT RTS card which is made before 08/13/2013 can't work on latest 3DS V6.2.0 directly. Players need to download the V6.20 update patch, and use another DS or DSi console to upgrade the R4iTT card, then the compatibility problem can be fixed. Do as below:
1. Download the latest R4iTT V3.03 kernel, and install it correctly to the MicroSD card.
2. Download the "fwUpdate_V6.20" to computer, unzip the patch, drag the file to the root of SD card.
3. Find a DS or DSi console, connect the console to AC power.
4. Insert the SD card to R4itt card, and put the R4 card into the DS console.
5. Turn on the DS console, open the R4itt mainmenu.
6. Enter the MicroSD card, and find the "fwUpdate_V6.20" file.
7. Select the file, and click "A" key to start upgrade process.
8. Wait untill the upgrade process finish.