What iPhone should I upgrade to?

I have an iPhone 4S in black, which I've had since Feb 2012 (it's September 2013 now) and my contract finishes in January 2014. I don't know wheather I should upgrade to an iPhone 5, iPhone 5S or iPhone 5C what would you recommend?

Forgot iPhone 5 passcode

Earlier I changed my passcode on my iphone 5 after installing the new software update, which I can't remember for the life of me. I went onto iTunes and tried pressing 'restore iPhone' (like it suggests on all the webpages) but a message just comes up saying 'you need to switch off 'find my iphone' on your phone settings before restoring'… I CAN'T! I have no way of getting into my phone to switch off this program.

Is iPhone 4 still worth to buy in 2013? And BLU Life play good phone or not?

I have two option either iPhone 4 FU or iPhone 4s auto gevey, because they are of same price in second hand mobile phones. My question is if iPhone 4 still worth buy in 2013? And iPhone 4s auto gevey ok to buy?
Also i was looking for an android phone BLU Life Play.
GSMARENA: http://www.gsmarena.com/...y-5359.php
because in the country where I live (Pakistan) it is considered as a good android phone? Is this a good phone?

Should I buy my iphone 5s from the sprint or he apple store?

So it came out yesterday as most of you know but I don't know want to wait in a long line in apple so if I buy it from sprint am I getting the same thing if I get it from apple? And if I do buy it from sprint can I get the apple warranty.

Is there anywhere I can still buy the iPhone 5?

I'm due for an upgrade with AT&T and currently have a regular iPhone 4. I don't want the 5c because it looks cheap to me and Id rather not pay the price for the 5s that is if they even still have some left. So is there anyway I can still get the iPhone 5 without just buying it from a stranger online?

ITunes app crashing in iOS 7?

I have an iPhone 5 and it's running iOS 7.0. I was using iTunes yesterday, and now it crashes every time I open it. I have had my phone for less than a year. People say I need to restore it, but I do not want to do that. Can someone please tell me how to fix this without restoring! PS: I rebooted it and exited all of my multitasking apps.