About the revert on the "List of Windows Phone 8.1 devices" page 

Hi, and I'm here to inform you there's no such thing as a "memory card reader" in mobile phones and I'll hope you'll understand that. They're called "memory card slots" and every mobile phone shop around the world, mobile phone info website and phone manufacturer website/instruction manual implores they're memory card slots because they're not totally external off the phone though you can remove such cards from the slot.

However if you still don't believe me then ask any one of your colleagues who went to info sites like GSMArena, Windows Phone Central or even Engadget and you'll know from them that those sites never call mobile phone memory cards slots "readers". One last thing, the Memory card reader article is not accurate and I don't know how the "Memory card slot" article got deleted or missing from Wikipedia but if I can get more info about the differences about the two as citations then I'm really moving that article's name to "Memory card reader/slot" and add info from that deleted/missing article.