I recently bought my redmi 4a through Amazon flash a sale. It was pretty good first but gradually started showing some problems. At times the phone shuts itself down and reboots automatically. It gets heated very quickly. I can’t even keep one single app in the background because that heat the phone drastically. Even though the camera quality is good at daylight it is very poor at and dim light. Speaking about the battery backup, the company promises 3120 MAH battery which last for one whole day but it doesn’t really last much. I use my phone while I travel and I was unable to use it more than 2 or 3 hours. The screen resolution is pretty good this very good to watch movies overall it is not bad phone