1. If I buy a unlocked phone and and activate it with cricket am I able to use the $25 dollar plan? or do I need a more expensive plan?

2. If I decide to buy
ZTE D930

instead of an unlocked phone do I have to use their special SD cards or can I use my own? If I can't use my own are there any phones were I can use my own?

thanks and if you don't know the answer to both just answer what you know