i phone 5?

naturally it is not necessary to buy every year the new version of a device like iphone or others...in reality you can think to change when there are many important upgrades and so they permit you to make things that you can't with the old versions but ,as in the iphone case,it is just an excuse to sell more probably you can sty with your device without problems!!

i have not so much money to buy such new phone, so i keep on using my old phone

Hi, For me, the mobile phone race has ended when I acquired my mobile unit ten years ago. I use it to call and send text messages and that's it. I use my mobile just for communication, no more no less. iPhones, besides for their being quite expensive, is not really a real value for the money if I can have a lower priced one with the same functions. I'd rather use the amount on some other worthwhile items that can last like jewelry or a collectible item that could double its price in a year's time. Now, there's a wise investment. I don't usually fall for items that may lose its novelty in a few month's time when another newer model comes up or may lose its value when dropped, soaked or rendered obsolete, laptops, smartphones and the like.

It depends whether it is important to you. Some people would say it isn't to them, and some will also camp out and queue 3 days before the new iphone is launched just to get one. Either way, both perspectives are okay. And as long people will continue to buy new phones and anticipate new models, companies will not stop making them.