Where to buy best flashcart for 3DSXL ?

Speaking of best flashcart,it’s debatable.different users maybe has different user experience , then got different views toward to  Which was the  best flashcart for 3DSLL ? According to a latest GBA Forum Poll vote, dstwo,r4i gold 3ds as well as acekard 2i have ranked top three list.
The Supercard DSTwo in terms of features is the best, as it has a CPU in the card that lets it run GBA emulators and SNES emulators at (mostly) full speeds. It’s the more expensive of the DS Flashcards.Just as we knew, the Nintendo updated the console firmware from time to time,yet,dstwo was always a amazing card to bypass the block and it was public be regarded to the best card at present.
But if the price is higher, then then the second choice was r4i gold 3ds rts. It use famous wood firmware and with a quicker updating,I personally would choose the r4i gold 3ds , you can take easy, it wouldnt  fail you and it was very easy to use .So IMO, Get a DSTwo if you want GBA/SNES emulators or an R4i Gold from r4ids.cn if all you want is DS games/homebrew.  Many store now provide preflashed 3ds flashcart , so you dont need do any updating yourself, and you can buy preflashed 3ds flashcard here : http://www.r43dsworlduk.com
Acekard 2i is a very famous card as well, yet,the official havnt updated it for ages, so if you use NDS,or DSi/3DS  firmware lower than v1.45 and v7.1.0-16,this card is abosolutely a good choice .If you have updated your console to the latest version,then take r4i gold 3ds rts or dstwo into account.

How can i update my 3DS V1.0.0 to V4.5 to play 3ds games with gateway 3ds?

Question
” I have a 3ds v1.0.0 and i want buy gateway 3ds to play 3ds games, but it wa said gateway 3ds can just work on N3DS V4.1-4.5, so,how can i update my 3ds to v4.5 so that i can play 3ds games ? ”
Replied from modchipfactory.com
Yeah, at present , if you want use gateway 3ds to play 3ds games, your 3ds version should be v4.5 or lower. and if  your 3ds version lower than v4.1-4.5, then you can use a right-copy card ( such as Mario) which is 3ds V4.0 ~ V 4.5 to update your console. If you use wifi to update your 3ds, then the system will automatically update your 3ds system to latest version v6.2.0-12, then you cant use gateway 3ds any more.
And at present, there have more than twenty 3ds games have been confirmed can work well with GW3DS ,and following is the game compatibility list
Bit Trip Saga – PASS
Bust a Move Universe – PASS
Cartoon Network: Punch Time Explosion – PASS
Cave Story 3D – PASS
Code of Princess – PASS
Cooking Mama 4: Kitchen Magic – PASS
Disney’s Epic Mickey Power of Illusion – PASS
Donkey Kong: Country Returns – PASS
Dream Trigger 3D – PASS
Fire Emblem: Awakening – PASS
Kid Icarus: Uprising – PASS (The game kicked me back to the 3DS Main Menu once, but hasn’t again so far. Thought I would note this.)
Luigi’s Mansion Dark Moon – PASS
Mario Kart 7 – PASS
New Super Mario Bros 2 – PASS
Paper Mario Sticker Star – PASS
Pilot Wings Resort – PASS
Professor Layton and The Miracle Mask – PASS
Rhythm Thief & The Emperor’s Treasure – PASS
Shin Megami Tensei: Devil Survivor Overclocked – PASS
Super Mario 3D Land – PASS
Super Street Fighter: IV – PASS
The Legend of Zelda: Ocarina of Time 3D – PASS
And following is a detailed video guide on how to setup and use gateway 3dsflashcart to play 3ds games and hope it will be useful for users who needed it