it depends on how many gb's you have.
it has 27 apps
No. They both run an averagely speedy A4 processor. The difference is the 16gb can hold twice as many songs, videos, contacts, and apps.
There are many Emoji Apps in the App Store!
yes, but not all iphone 4 apps are available on the iphone 3gs/3g/2g becuase they are too high resolution apps, or need a front facing camera.
Although iPads can download apps made only for iPhone/iPod Touch, the iPhone can only download iPhone or iPhone/iPad apps. Apps made only for the iPad do not appear on the App Store. Luckily most of these apps have an iPhone counterpart such as Angry Birds (iPhone) and Angry Birds HD (iPad only).
You can't lock your iPhone apps without jailbreaking the phone.
Yes It Does, If You Download To Many Apps Or Run To Many Applications At Once It Might Glitch
2000 songs
20,0000
Almost all of the applications on the iTunes store is compatible with the iPhone 4. Exceptions are applications which are for the iPad.
Well it was said that the iPhone 5 would have a much thinner screen then the iPhone 4. Then the Iphone 5 would have more and better apps on it.
the difference between a iphone 4 and iphone 5 is that the back is made out of aluminium and it has 5 row of apps on a page