The thing people liked most about wp was it had a different UI. There were people that didn't like it, sure, but WPs main cheering point was the original UI. That was absolutely not the problem
"talk to Samsung"? Samsung dominate android phone sales. They are single handedly winning the phone wars against iphone. Why would they now support a potential challenge to that?
I believe Microsoft still has a chance but they need to 1) talk to samsung and other big android/smartphone manufacturers 2) make a killer feature