The bigger the screen size is, the better the user experience.
Samsung Galaxy J Max: 7"
Razer Phone: 8GB
Nokia 808 Pureview: 41MP
1080 x 1920px
Sony Xperia XZ Premium: 2160 x 3840px
8. front camera megapixels
Vivo V7: 24MP
9. has an external memory slot
The device has a standard memory slot (such as an SD or micro SD card slot) so that you can either extend the internal storage with affordable memory modules or you can retrieve data, such as photographs, easily from a memory card.
Vivo X5 Max
84% have it
Asus Zenfone AR 64GB: 4.6mm
11. internal storage
Huawei Mate 10 Porsche Design: 256GB
12. has USB mass storage support
It can transfer files, music, photos via USB, no need to install additional software.