there is two different things. SM-J5008 is china model firmware (clone) . but the model SM-J500/DS is not chinese phone model. with this firmware i have to much problem, 1) memory ram is not working good, 2) i can't play games because some games the phone not open, in some other games like "zynga texas poker" when i play, after 2 minutes the phone going out from game. 3) when i open the facebook app , the phone switch off automatically. if i unistall updates from facebook there is ok to open the fb app without switch off .4) download mode is not installed.i have try many different ways to go in but nothing (thats mean i cant flash with ODIN).The point is : someone flashed the phone with fake software before i buy that. now i am looking for the original flash software SM-J500H to install with sp flash tool. i have tryed many of them but was broken software program.(fake)... if anyone have idea for one program (flash firmware) like that ,who know good the program is working 100% .please tell me. i am so tired from fake firmwares on many pages in internet.if you help me, i will thank you so much.