Lava Iris 356 is budget smartphone this phone was my second phone I use this phone for about 3 month and with that experience I can say you that it is good phone how to handle minot task. It is three G enabled phone so you can video call directly by using network provider this phone cost me around 3500 1 years ago and I was satisfied with the performance of this phone.
Pros-
# this Smartphone is having dual core processor so you can do multitasking in
#it it is 3G enabled phone so you can do video calling from it and you can browse and 3G speed
#It also Support direct 3g calling
# it has got 15000 MH battery which is sufficient to handle or last for at least 3 days while doing heavy performance, if you will put this phone to standby mode it will last for more than 10 days
#it can play casual games like Temple Run Subway Surf Candy Crush
Cons-
# it has got only 256 MB of Ram so you may feel lack while performing multitasking
# it has a very poor display quality
# it has 1.3 megapixel camera with is of no use . you can identify the picture very diffcultly and the flash given this phone is almost of no use . it is like spark very less effective flash
#it has also got very bulky design so you may feel bored while using this phone
So I conclude that this is phone for long lasting battery backup.