This phone is good in its price range but it has many cons and its my personal experience with this phone . It has a very slow face unlock which I hate and aslo the fingerprint sensor is slow and doesn't work properly sometime .
This phone does not have stereo speakers which I expect from a flagship and only has single speaker.
Although it supports 27w fast charging , the company only give 18w fast charger in the box.
I also noticed some lags in games although it has the Snapdragon 855.its camera is average as it overexposes the image which on my personal opinion dont like.it also doesnt have a hybrid sim slot which I prefer than only dual sim.
You cannnot trust this phone near water.
I also noticed the lack of monthly security patch updates.redmi k20 which was launched with this phone already got the latest security update but this phone didnt