Why won't my Apple Watch pair with my iPhone?

[iMore Question]

My Apple Watch became unpaired from my iPhone and now it won't pair back. I've restarted them both, I've factory reset the iwatch and now it simply won't pair. Please help

 

[eyecrispy]

Bring it in and let the folks at the Apple Store look at it.

 

[Butterfly2]

If it's paired with another device it won't pair with your iPhone!!