I looked at this a while back. The screens are too small for any decent stuff. And they keep changing the operating systems. It's a bit of a nightmare to do anything good. Besides, notebook PCs are becoming far more popular these days. I have a version for UMPC's that can be controlled by touchscreen and has nearly every feature of CV. And it's free with CV.
not sure what kind of phone you have but I myself have an iPhone and I found a program called 21 Pro Sponsored. Its free and you basically just play blackjack starting with a $1000 br. The cool things about it is it keeps a Hi/Lo and KO count and you can either have it hidden so you can check yourself or have it shown during play. it really helps to develop counting skills as if you were playing at a real table