Mi A1 is Android one device. This is collaboration between Google and xiaomi. Phone has stock Android and not runs on regular MIUI.
Quick specs -
Finger print scanner/ IR blaster
3080 mAh battery
12 megapixel dual rear camera f 2.6 & f 2.2 / 5 megapixel front camera
Dual nano SIM ( Hybrid SD Card)
64 GB storage
Adreno 506 GPU
5.5 1080p LCD screen ( Gorilla glass 3)
4 GB RAM
Snapdragon 625 ( octa core 2.0 GHz)
Overview-
Metal back
Good build quality
Fingerprint sensor at back
Has Google assistant
Single speaker at bottom
Android 7.1.2 ( 2 year of update promised)
Pros-
For 15k best build quality, feels like premium Android handset.
Very good screen quality, adequately bright, good viewing angles.
Cellular call quality is also very good
3.5 mm headphone jack gives outstanding audio output.
Has all necessary sensors, IR blaster which helps to control TV and AC through phone.
Fingerprint sensor not that fast but has great accuracy.
No issue while multitasking thanks to Google and RAM management.
Runs smoothly on all games and on high graphics heavy gaming temp goes to nearly 42° C
Physical LED notification light of only single color.
Dual camera- 1.wide angle lens 2. Telephoto lens
Camera performance is good, need good lighting, has 4k support for video recording .
For rough use nearly 6 hours of screen on time, battery life is good.
Cons-
No FM support.
No electronic image stabilization while recording.
No HDR auto mode.
In low light camera struggles.
No NFC chip.
5V 2A charger, no fast charging, takes 100 minutes for complete charging.
Overall Mi A1 is a good phone but not the perfect.