The bigger the screen size is, the better the user experience.
Samsung Galaxy J Max: 7"
Nokia 808 Pureview: 41MP
Asus Zenfone AR: 8GB
480 x 320px
Sony Xperia XZ Premium: 2560 x 3840px
8. 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.
81% have it
Microsoft Nokia 105 Dual SIM: 68.90g
10. every pixel has three subpixels
The device has a display with three full subpixels per pixel, resulting in a sharp and crisp picture. Pixels in some displays (like AMOLED) share one subpixel to preserve space. This can result in a less crisp, slightly blurred image.
80% have it
Asus Zenfone AR: 4.60mm
12. has a removable battery
The battery is removable and can be replaced by the user if broken.
41% have it
13. internal storage
Huawei P10 Plus: 256GB
14. has a radio
It works as an FM radio with included headsets
63% have it
15. has USB mass storage support
It can transfer files, music, photos via USB, no need to install additional software.
91% have it
Vertu Signature for Bentley: 42mm
Motorola FlipOut: 67mm
18. Bluetooth version
Xiaomi Redmi 4A 16GB: 4.20
19. number of microphones
More microphones result in better sound quality and enable the device to filter out background noise.
Huawei Mate 9 Pro: 4
20. Is free and open source
Anyone is free to use, copy, study, and change the software in any way, and the source code is openly shared so that people are encouraged to voluntarily improve the design of the software.