It depends how many gigabits it has and how much memory you have used up.
if all you have is apps, then 16 GB.
it depends. an iPhone may have an 8 gb, 16gb, 32gb and 64gb(iPhone 4s) models.
Yes
Yes via the many apps available from the app store
Yes but there are also paid apps so only get the free apps.
It depends on the length of the films.
There are more features but dont think its the iphone 5. The 4s has a better camera and more storage. It also surfs faster, and loads apps quicker than the iphone 4.
Ipod touch vs Iphone 4s. Iphone 4s can hold ALOT more data than the Ipod touch, also the Iphone 4s has a higher rating than the Ipod touch. Its honestly up to you but based on the people that have each its usually chosen that Iphone 4s is better.
The Nokia Lumia 900 is better than the IPhone 4s because it is cheaper and has better apps. It also has a bigger screen so if you like watching videos it works better than the IPhone 4s. I have had both the IPhone 4s and the Nokia Lumia 900 and the Nokia Lumia 900 wins by far.
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It depends how big the song is, it also depends how much other stuff is on it, like games and other apps, they take up more than a song... Hope this helps :)
Iphone 4s has an 8 mega pixel camera