I have access to an iphone farm for free

title pretty much explains it, my dad gets these iphones from work, most iphone 4 from people upgrading and many of these are like new.

Guessing i could get a hold of 10+ iphones, i tried testing checkpoints and it barely even got a point on it, some loading error when I click play all the videos, I'm going to try and see what's up with it.

I wanted to use checkpoints over perktv be I've read around perk completely sucks this time of year and I cant babysit it while I'm at school.

If i cant get checkpoints to work, anyone have ideas for me?

any advice is much appreciated