My phone(intex aqua crystal)Failed to install nagout update

[Abdal Alam]

I got Nagout update,after downloading I tried to install that update but installation fails in between every time showing error' installation problem's.
Plz help

 

[B. Diddy]

Welcome to Android Central! Was this an official update from Intex pushed over-the-air to your phone, or downloaded from their official site?