Thinking of an upgrade...Grand Duos or Lumia 720 ?

[Somdk]

I see most of the commonly used features present on both the models.

The tech specs are also competitive. But the Grand Duos is a level up on Cam, Processor and Screen size.

But i have to talk a lot on phones, around 7,8 hours every day ? So i am confusd about the battery back up of these models. Can anyone help me on this with your past experience ?

Also, are backup features as versitile on Windows Phone 8 OS as Android ?

And what about the app support ?

I am currently using an Samsung Galaxy S Duos.

I hope someone here has had some experience with windows phone battrry backup ? Good ? Bad ? Better or ok ? I am really concerned on that point as i have to talk a lot over the cell.

Thanks a lot in advance

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