FYI, Last month I was in China, I used Reindeer and HidemeVPN on my Android Tablet and VPNme on BB10.

Reindeer is the quickest but slightly expensive, but support cross-device using same account. HidemeVPN is cheaper but only one device and slightly slower. VPNme is super slow and not cheap but it's the only one I found on BB10.
Good luck! (Gmail on phones was blocked last month, and outlook was reported not running well last week.)