2007 Was the year of the first iphone
2007
2005
2007
1999
2007
The iPhone 5c came out in 2013 and may or may not still be available from Apple in 2015.
Vodafone has announced that it has signed a deal with Apple to sell the iPhone in Greece "later this year". See related link for full press release by Vodafone.
The cheapest Iphone 4s prices are available directly from Apple. An Iphone costs only $99 (reduced from $599) when you purchase it with a 2 year contract.
6.1 million iPhone 2g models were sold in their availability period.
2012
12000
The exact date is yet to be confirmed. Apple iPhone 6 is expected to be released later this year.
Many providers now have the iPhone 4s available on a 3-year contract for $79.95. There are also people who will be liquidating their iPhone 4s in order to obtain the new iPhone 5.
The is no news or indication at this time that Apple will end the iPhone series next year.
When buying then new they come with a warranty.