I have personally used Redmi 5A. The mobile was budget friendly and there was no problem with this mobile.
Then Xiaomi launched the Redmi 6A with only upgrade of 18:9 ratio display with it, and a simple face unlocking!
There is no more major upgrades at all! But they are grabbing a huge price for it. arround 10, 999/-
That makes no sence to buy the mobile with a much higher price but with some minor upgrades.
So if you are planning to buy a low budget mobile then buy Redmi 5A.
But do not go for it. If your budget is arround 11000/- then go for Realme 1. Because this phone is the best phone I can recomand in this price!