I'll be travelling to various areas in mainland China next week. I have a blackberry 8830 world edition with an unlocked (according to Sprint) GSM. I was planning on getting a World Data Plan Pkg from Sprint for the 2 weeks I'm travelling which should get me access to emails.

However instead of using $2/min voice, I was thinking of purchasing China SIM. Does anyone have any information on SIMs, where purchased, how much, $/min, etc?

There is a China travel site that lists a price of $29 for the SIM which includeds $8 talk time and can be delivered to hotel. Rates back to US are $0.38/min. A contact in China says SIM rate is usually $1.20/min.