Hello, I wanted to ask about some stuff. First : what is the difference between The ebay offers with " iphone 5s sprint" that are 400$ and those for 500$ ? What is the difference between buying iphone 5s (spring , AT&T , T-mobile) from ebay and buying them from ebay? If i bought any of them from ebay , which will work at egypt ( where i live) without the need of unlocking ? Thanks in advance !