Huawei designs its own ARM based chips and modems that BBK and Xiaomi do not.
Unrelated: India and SEA are where a good majority of these BBK phones are sold. And BBK tapped into the PPI scheme of India to start manufacturing in India > 3 years ago. Most phones sold in India are made in India.
> India and SEA are where a good majority of these BBK phones are sold.
Those BBK phones have a huge presence in China, you can pretty much find their shops in every mall and every major street. I'd be surprised if the majority are sold outside of China. They are in general shitty phones trying to rip off people who are not into tech, I mean you can easily get like 1-2 generation older hardware when compared with Xiaomi while paying the same prices. back in around 2015, they were called "factory girl's phone", meaning their target group is those young females working as labors in factories. They normally don't care what is the spec of the new phone, they just want the phone with the most popular selfie features their friends have, that created a lot of profit room for phone makers and BBK took that market.
Unrelated: India and SEA are where a good majority of these BBK phones are sold. And BBK tapped into the PPI scheme of India to start manufacturing in India > 3 years ago. Most phones sold in India are made in India.