Default [Q] Buying a Firefox Os Phone

Hello,

I have been thinking about purchasing a firefox phone for testing apps for quite some time. So far I have looked at phones from three manufacturers:

1. GeeksPhone
Their Revolution is yet to be released but they haven't announced when that will be.
2. Zte Open
This seems to be the best bet, its cheap and its readily available on ebay india.The seller page mentions that it supports US 3G network? Would it work with Indian Carriers?

Thanks!