now the issues with iOS started to surface more frequently compared to iPhone 4 era
eg my friend iPhone 5S suffered some touch screen issue after updated to iOS 10
performance also drop
Oppo/Vivo target youth and ladies markets - a great market which major manufacturers haven't tapped in yet, with aggresive marketing campaigns such as commercials in cinemas, Siti Nurhaliza / Korea guy as the ambassador, the sales volume is not to be underestimated, simply walk into any Aeons always can see booths selling one of these
Huawei on the other hand is touted as premium Chinese brand, with Honor cater to midrange and budget oriented
meanwhile Sony, its like Volvo cars in Malaysia, either you like it, or you just ditch it, even not doing that well in its home country Japan, but overall it is still a solid phone, I most likely will keep it instead of selling it
Totally agree with what you saying.