App trailers for iphone

Me and my friend downloaded app trailers
We want to put in eachothers referral code but I have an iphone and she has a android phone
On android you go to apps and scroll down till you see enter referral code but i don't know where to find that on my iphone
The apps look alike but are somewat different
Can anyone tell me where to put in a referral code on an iphone

How to avoid Trust This Computer on iPhone?

I dropped my iPhone 5 and 3/4 of the screen is missing
I can still unlock it but as I have never synced it on this computer before I'm required to "trust" the computer before importing the photos.
As I can't click "trust" because the screen is broken I'm unable to retrieve the photos and other details.

Is there anyway to access the phone without the "trust"?

Why does my Iphone3GS crash when i play games?

Every game i play in my Iphone 3GS it crashes and sends me back to the home screen, i played these games before and never crashed, now every other game it crashes with the exception of Angry Birds, that i can play normally.

All the other games even these who never crashed before as above, all freeze and crash. How can this be fixed?

ICloud Apple Id locked for security reasons?

Okay so I reset my phone to erase everything and when I put my password in it says locked for security reasons, so I went to forget apple id to fix it but I made this id a long time ago I for some reason can't remember the security question or the email I put in someone please help I already called apple they said its helpless