I recently got a 1.0.0-0U O3DS And i found that even i update my firmeare by retail cart, there won't be browser installed so i am thinking how to upgrade and hack it? This is the way i am thinking: -upgade to 2.1 by retail cart(fifa12)(that's only cart i see which's cheap in price now) (necessary version for rxtool) -Use gw menu by nds flashcard -format emunand -install rxtool by nds flashcard -inject fbi into 3ds sysnand by rxtool -install and use sysupdater cia by fbi to install 4.5 firmware downloaded from internet Now i have 3ds with browser and on firmware 4.5? the problem i concern is that can i install gw menu in 2.1ver? can i use sysupdater in 2.1ver? If it is possible, i am going to buy a nds flashcard from internet's shop, so i would like to ask if it's possible before buying it? Or is it possible to use download play by my 4.4j o3ds with 9.5u emunand for the system upgrade on my 1.0u 3ds?