I noticed that most of the reviews of the Cubot P6 phone on KZfaq are just adverts for the sellers, so here's one from an actual user who has had the phone for a while.
In short, the massive market for Android phones in China has meant they are being mass produced, so the cost of a generic unbranded phone has fallen dramatically. The Cubot P6 is what an Android phone should be. Slick and functional. It use a common Mediatek 1.2GHz dual core processor and completely blows away my old Motorola Defy plus in terms of performance. The 5" screen is clear and bright making it very easy to read and very good for viewing videos. The back camera is OK but not anything special. The front fixed focus camera is actually pretty good.
The phone is a dual SIM unit that can accept two SIMs from different networks so you can carry a single phone when away from your home network area. The feature works very well with the phone recognising new SIMs, identifying them and letting you choose what function each will have.
So far I think this is the best phone I've ever had.