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Vanzotec is responsible for the factory ROMs, they also build releases for ZTE, Zopo, Ouki, etc.
That explains that some of the important details in the OS don't work properly and bug fixing takes 'forever' because they develop for hundreds of devices.
Also, if UMI decides not to order a Marshmallow based ROM from them for a certain device, then that's it.
You can only hope that a similar device exists that receives Android M, so there's a (small) chance of getting a stable port... |
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