Hacking R4I-SDSC in New 3SD XL

[3DPiper]

My nephew brought his New 3DS XL and said his mom bought him a R4I-SDSC, but he couldn't get it to work.
His 3ds firmware is 11.9.0-42U
I assume I need to update the R4I firmware, yes? Will probably need a regular DS to do that.
The R4I only plays DS and older games, correct?
What flashcards allow playing full 3DS games?

 

[Quantumcat]

DS flashcarts can't play 3DS games. Follow https://3ds.guide for installing CFW to be able to play 3DS games. If you need any help let us know and include what page and step you are up to. Good luck!

 

[Kubas_inko]

I guess that the flashcard is patched on your fw. So you need to hack your system to make them work again.

 

[3DPiper]

I went to the website on the card itself (r4i-sdhc.com), downloaded the latest software/firmware, deleted everything on the SD card (except games and saves), copied the new software over, and fired it up. It worked! Very cool..
Let me explore the routes for a full 3DS flash card..
Thank you

 

[Quantumcat]

I went to the website on the card itself (r4i-sdhc.com), downloaded the latest software/firmware, deleted everything on the SD card (except games and saves), copied the new software over, and fired it up. It worked! Very cool..
Let me explore the routes for a full 3DS flash card..
Thank you

You do not need a 3DS flashcart.

 

[Kubas_inko]

I went to the website on the card itself (r4i-sdhc.com), downloaded the latest software/firmware, deleted everything on the SD card (except games and saves), copied the new software over, and fired it up. It worked! Very cool..
Let me explore the routes for a full 3DS flash card..
Thank you

As @Quantumcat said, you don't want a 3ds flashcard. You want to hack your system.