Where to buy R4 card to play 3ds games on new 2ds/3ds xl in USA?

NTRboothax compatible R4 cards can finally support Nintendo 3ds games. But which one to choose and where to buy in USA for New 2ds xl or 3ds consoles? Here you can get answer.

Which R4 3ds cards support Nintendo 3ds games?

In 2017, there are R4 3ds flashcards can play nintendo 3ds games, but they don't support .3ds file directly, what they do is hacking 3D Firmware console via NTRboothax to install Boot9strap and 3DS CFW, then you can play 3DS Games with CIA format.
The following are the R4 cards support NTRboothax exploit. In other word, they are the flashcarts lets you play CIA 3ds games.

Flashcart Name	Current Price	“Time Bomb”?	3DS Versions?	DSi Versions?	NDS Games?	Other Notes
DSTT	$16.5	No	None	None	Yes	Only models with certain flash chips are compatible with ntrboot.
R4i-SDHC 3DS RTS	$17.9	Probably (Date Unknown)	<= 11.6.0	<= 1.4.5	Yes	Compatible with V0.3.1 Ntrboot flasher and V3.3 Ak2i ntrcardhax flasher.
R4i Gold 3DS PLUS	$25.5	No	<= 11.6.0	<= 1.4.5	Yes	Recommend highly
Acekard 2i	$23	No	<= 4.3.0	<= 1.4.4	Yes	Support DS games without flashing back.
R4iSDHC GOLD Pro 20XX	$14.9	3.9b: September 3, 2019	<= 11.6.0	<= 1.4.5	Yes	Compatible with V0.3.1 Ntrboot flasher and V3.3 Ak2i ntrcardhax flasher.
R4iSDHC RTS LITE 20XX	$17.5	3.9b: September 3, 2019	<= 11.6.0	<= 1.4.5	Yes	Compatible with V0.3.1 Ntrboot flasher and V3.3 Ak2i ntrcardhax flasher.
R4iSDHC Dual-Core 20XX	$16.9	3.9b: September 3, 2019	<= 11.6.0	<= 1.4.5	Yes	Compatible with V0.3.1 Ntrboot flasher and V3.3 Ak2i ntrcardhax flasher.
ACE3DS X	$28.9	No	<= 11.6.0	<= 1.4.5	Yes	With a button to switch freely between DS and NTRboot modes.
R4I B9S	$19.9	No	<= 11.6.0	None	Yes	With pre-flashed NTRboothax, much easier to use.
STARGATE 3DS	$85.9	No	<= 11.6.0	Not sure	Yes	Pre-order

Which is the best one to buy for 3ds and new 2ds xl?

Among these r4 ntr flashcards, there are 3 ones we can recommend you. No one is perfect to buy, you can choose which according to your own need.
1. If you want to buy a cheap and easy to use NTR Mode R4 card, then buy R4I B9S.
2. If you want to choose the most simple R4 Ntrboothax card to use, then buy ACE3DS X.
3. If you like to have an R4 wood kernel NTRboot compatible card, then buy R4i gold plus 3ds.

Where to buy R4 card for playing 3ds games in USA/Europe?

You can choose this site, the 3ds-flashcard.cc, it is shipping from USA and Europe on the R4i b9s and R4i gold 3ds/R4i gold 3ds plus. And it supports paypal/credit card payment, worldwide delivery and free game download code. Even for you want to get a voucher code to buy R4i b9s 3ds/r4i gold 3ds/R4i gold plus/Ace3ds x, they support too by just e-mail to admin@3ds-flashcard.com.