No glance screen

[CharanKumar]

Why no glance screen for lumia 520?

 

[Priyanka Goswami]

Because it does not support glance screen. Simple.

 

[Sourabh Parchure5]

Due to some hardware restrictions.

 

[thusharaya]

Forget it...

 

[xandros9]

We don't know for sure.

My speculation:
The display's quality isn't good enough to support the low power levels asked of it or would use too much power