Research firm Blancco has published a Mobile Device Repair and Security Report that threw up some interesting facts. The report puts Samsung as the OEM with the highest failure rate among Android manufacturers and the Xiaomi Redmi 4 as the specific model with the highest failures in 2017. In the Apple camp, the iPhone 6 was the device with the highest failure rate.
https://www.notebookcheck.net/Report-Xiaomi-Redmi-4-and-Apple-iPhone-6-were-the-worst-performing-smartphones-of-2017.316624.0.html
The report is extremely misleading. The figures shown are percentages of models among all failing devices, not the percentages of devices failing for a particular model. The report repeatedly uses the phrase "failure rate", which is absolutely out of place here!
It's an absolute rubish, in other words. Those "experts" should be banned from writing any reports.