I purchased this 4 months ago for using many educational apps. I installed many after this the speed of phone is same as I us it first as new mobile.
The battery backup is so high. I frequently also play pubg for 3-4 hours this is heat to less and usage of battery also less during this.
When I purchased it shock by low price giving best features I felt it may device but I purchased it by my friend suggestion as my feeling changed after using this.
So I suggest everyone to purchase it for many purposes because many quality features are given here in low price.