yes it is a iPHONE so yes it can make calls
You will have to jailbreak your iPad/iPod/iPhone.
It can be done, but there are a lot of steps required into unlocking the IPhone 4 without paying. Then there is something about a jailbreak program. So yes you can do it but it doesn't seem easy.
No. You can't activate the iPhone without activating service plan. If you are just looking for the ipod and internet functionality, you should consider the iPod touch
iPhone 3gs are more roundish and without Siri. The edges instead of being straight are round. The iPhone 4g has square edges without Siri. The iPhone 4s is just like the 4g instead it has Siri. The iPhone 5 is longer and has Siri. The iPhone (original) has round corners and is small. Same with the iPhone 2. If you have a iPhone or iPhone 2 you can replace them. Also, the iPhone 3gs is not out so you cannot buy it anymore. Only the 4, 4s and 5 are out. They will be getting rid of the iPhone 4 soon.
sure as long as youre within range of a public network or hotspot, you can get internet for free
No. Your iPhone may be a little delicate without a case, but in OS terms, your iPhone will last two years without being overridden with dangerous software or thrown against the wall in anger.
iPhone 5 to Mac Transfer is a smart tool to transfer iPhone 5 to Mac local disk. With this iPhone 5 Transfer Mac, you can backup songs and videos, photos, ringtones from iPhone 5 to Mac soon directly without any loss.
Iphone probably cost more and must keep paying, but it does have better capabilities like larger screen and better camera...
After Iphone 5 is the Iphone 5s
An iPhone 5 is the latest version of the iPhone. The iPhone 5 is the lightest and slimmest of all the iPhone models.
you can't