Android based smartphones from vendors such as Ulefone and Krüger&Matz contain "com.pri.factorytest" application preloaded onto devices during manufacturing process.
The Ulefone Armor 5 Android device with a build fingerprint of Ulefone/Ulefone_Armor_5/Ulefone_Armor_5:8.1.0/O11019/1528806701:user/release-keys contains a pre-installed app with a package name of com.mediatek.wfo.impl a…