Using iPhone X, synced new pros, worked out of the box. now I cannot get them to sync to make a phone call, or receive a call. They don't detect and sync for a real ling time. The hardest part is having them sync on a phone call. I have reset everything, checked version of firmware- 2D15. I returned my first pair thinking they were defective... now its the second pair with same results. What am I missing? thanks..