Overheating and Quick Battery Drain

[jojoe42]

it did not magically get fixed. you most probably did something that fixed it.

Wrong. This happens all the time when I install new OS builds, flash it back or whatever regardless of platform. The first days/weeks are terrible and laggy due to one-time background optimisation.

 

[ifulike]

I'm planing to buy a Lumia 1520.