I have never owned an iPhone and beside running iOS stimulator on my computer or checking out a friend's iPhone I don't have any other experience on the platform.
However I will pick Android over iOS. With Android you have freedom, you can easily install apps outside Google play store. Apps that might not be available for your region.
What's your preferred Mobile OS.
I should prefer Android. It's simpler to me. Though I don't not know much about iOS.
maximum size of all files should not exceed 10mb