Down Syndrome Cell My Son Who Is 16 And Has Down Syndrome Wants A Cell Phone. I Have A Corporate Phone So I Can Not To A Plan.?

My son who is 16 and has Down Syndrome wants a cell phone. I have a corporate phone so I can not to a plan.? - down syndrome cell

I want to buy him a Pay As You Go mobile phone. Here are my concerns:
1. we can choose an easy number to remember him?
2. There are camera phones pay as you go, so you can save an image with name Preson too?
3. What are the best plans do not extinguished minutes if not used within a certain number of days after activation?