Considering the fact that world is going completly mad the most important features for smartphone will be reability, long running time and neat network reception. In such scenario [Sonim XP8] is a perfect phone because it has interchangable battery, strong millitary protection and it is almost indestructible. Device is based around [Android 8.1] , so telemetry is minimal, but nerual networks is already there [in their rudimentary state]. So rooting phone and installing [neat ip-tables firewall] and [root-based hosts adblocker] will solve problem like there was no any.