[AC Question]

Hello guys, i am going to buy the Samsung Galaxy S5 Duos from Syria (which i currently lives), and i am a little bit worried and confused about the place of manufactured and the model's.

And i was wondering if you could help me with some details ;/

)1 How many manufactured countries and which one is the best to pick for the s5 Duos?

)2 Which model should i pick? SM-G900A (AT&T), SM-G900F, SM-G900H, SM-G900R4, SM-G900T (T-Mobile)....ETC...

)3 If i am going to buy a cover, such as the Spigen tough armor will it work at any s5 model? (cuz i had a problem with my previous s3 cover, it worked on the Vietnamese version, but not in the Chinese one.

)4 if i am going to buy an original battery will it work on all versions?