I know when someone reads your message, their picture in mini appears after the last message. Here's where I'm confused:
- If it's shaded, that means they're not currently looking at your particular conversation?
- There's a mini cell phone icon that appears beside the mini picture. It seems to appear randomly. Does it simply mean that they answered your hangout via cell phone? Or does it mean that they are currently using hangouts with another conversation (if the mini picture remains shaded)?