Good post. Thx
what about the CPU, ROM and Camera?
I have Jiayu G2. I have no complaints except that I cannot find many custom ROMs for it. But, it is not a very popular model. I think G4 will be better and bigger community for support. Like the Jiayu G3. I can suggest you to stick with popular brands like ZOPO, Jiayu, Lenovo, Huawei, ZTE, Xiaomi etc.
Thanks a lot 
Any Jiayu android smart phone users here? How’s your experience of using it? is it really good?
Not really. Some cheap things also are worthy buying for their good quality.
Many Chinese electronics are cheap because they are purchased from manufacturers directly by the sellers with lower price.
Many shopping website do like this, such as Suning.com, JD.com and mentoo.com ….
My first Android phone is OPPO U701… my sister gave it to me last year and it is not new… so i’d like to buy a new one…
Thanks so much!
i will have a look….
Look forward to it…