Drive Licence & Cell Ph

Sorry, this is not an immigration issue. However, it is related to a trip to China.

I will visit China soon.

I have a US drive licence. Is it hard for me to get a Chinese drive licence in a city in China? How?

Which kind of cell ph in China I need to buy, so that when I take it to US I can still recevie calls and text messages from China (It will keep the Chinese phone number). How much for each call (out and in ) from/to China? How much for each text message (out and in) from/to China?

Thank you.