In the UK contracts start from around £30 per month with an initial down payment against the iPhone. You can have a free handset but pay more monthly.
I'd say 80-170$ monthly.
It all depends on the carrier and the package you buy and dont get the iPhone 4 wait till the iPhone 5 its going to be badass.
Currently, on Sprint, the iPhone 4 costs about $99.
With 2 year activation at AT&T you can get a 16GB iPhone 4 for $199 or a 32GB iPhone 4 for $299. A data plan is also required, the minimum cost $15/month and gives you 200MB of data per month. You will also need a messaging/calling plan.
The iPhone 4 will be launched in Israel on September 24, ... How much dose an iphone 4 cost? from store the cheapest you'll get it is around £200 pounds .
It does not exist yet the iPhone 4 does.
Probably less
it cost $900
$$50
400 $
the answer is around $230
If on a plan you can get it for 69 dollars a month