A BIG NO to Redmi 1s, if you planning it for Gaming, the heating issue is resolved, but this phone is pathetic in gaming, in my office there are more than 10 redmi 1s and also my brother has one, it does not play games well, lags like a sub 4k phone,
camera and sound is excellent, but no for gaming with this one. The issue with this phone is that the specification is great for the price, but it could have been better if they would have used an android version without too much modified UI, it makes phone slower, better look for something else, i dont know if there is any custom rom for this one, if there is, check how it works with that, and then decide,
Also note, that all i mentioned above are on latest update, but phone is no good for gaming