1. check screen [dead pixel/crack/etc] dead pixel can be check by browsing a black screen
2. check button [make sure all the buttons is workable, included stylus screen]
3. check wifi connection [set up a wifi connection on ur phone and test it up]
4. check charger port, bring a powerbank with u and try to charge it up
5. if everything mentioned above is ok, it should be no problem I guess.

it does, I got a trancend class4 4gb and samsung evo16 gb (class 10 i rmb). main menu definitely will smoother but aint much, ingame I am not sure since I'm using cartridge instead.