What company is iPhone from?
apple for making and at&t for phone service apple.com att.com iPhone was designed by Apple, manufactured by many ODM like Foxconn, and sold by AT&T, China Unicom, Apple Stores.
What company can i connect my iphone 4 from sprint ?
You can have it flashed to Boost or Virgin.
In what company is it safe iPhone 3G 16gb black from USA to SRI LANKA?
Isn't good , the 16GB version is way better .. why ? because the 8GB was a deadline rush release, meaning that it still has errors and on-screen freezing probs .
Which company is cheaper to buy the iPhone 4S from?
Yes it can but I personally do not recommend it, unless it is done properly and not 'jailbroken'.
If i order the iPhone 4 online from the apple website for 199 can i use it in India with a micro sim of airtel or reliance or some other company?
yes you can :) from like Verizon or at and t im pretty sure