Iphone 4 and 4s is going to be around for a long time right?

The iphone 4 and 4s is going to be around for a long time right?

If you mean will Apple keep selling them for a long time, the answer is no… Eventually it becomes too much expense for Apple to continue supporting old phones, and too much work for developers to ensure that their newer apps keep working on old phones. That means that eventually those phones will stop being sold.

Not exactly. The 4 is expected to be discontinued this year when the next iPhone comes out & next year the same thing for the 4S, though they should be updated for a while after that.