For all Pakistani WP users

I have two daily tests Monday morning. I don't get it, why do they call it a Sunday!! 😳
 
Talked to a confused lad with a Lumia 620 yesterday which he had bought a few days ago.
He didn't had it at the time so I wasn't able to tell him much.
 
Saw a 535 yesterday in the hospital. And I talked to the guy for more than 5 minutes. He said that I was the first person in almost a year that he saw with a Windows phone. Before that he used the Lumia 720. I also told him about the Windows central app and gave him my facebook profile name.
 
Has anyone read the article about switching L535 battery?
I mean switching L535's battery with more strong L540's 2200mAH...