My girlfriend had this mobile 1 year back and after 4 month she noticed that the battery backup is not last for 1 hour. service center told her to fix this need 7000 rupees.
Then she gave me this phone to rapier it. the worse part is that the mobile has a fixed battery and the back cover fixed with adhesive. the battery costs me 1500 rupees and its just only 2400 mah battery.
You have to pay a huge amount for a 2400 hr battery which will give you 8-10 hours maximum on net. so you have to carry your battery bank with you.
Moreover, it is a 3g phone. so you can not use it for 4g sim. So, in my opinion, please do not go for it.