Minneapolis, MN US
Join Date:Joined: Jul 2006
If LG said (when you purchased the watch) that it would be compatible with the Note 4, or if they list it as compatible now, then they need to follow up on that and provide you with support to get it working.
If you purchased the Note 4 and Samsung has is written somewhere in their documentation that they would support Android Wear watches, then they need to be pestered with your support needs.
It's possible that your carrier, who sold the Note 4 to you, could also be held responsible for providing support.
Though I love XDA, and that community help is, reasonably, always at hand, it's taking on the work that manufacturers and retailers are promising to do. In order for manufacturers and service companies to accurately price their products, they need customers to make their needs and expectations known. If those expectations aren't met, then they need to make less money by having fewer return customers, or returned product.
It may not be the easiest, but it's the right thing to do.