I just made a test call using the Fenix 8 51 and despite having the volume at the highest level, I can barely understand the other party. You have to hold the watch right up to your ear to understand the other party...it's quiet here in the office and I can barely understand it...how is that supposed to work when you're running or doing other outdoor sports...is it like that for you too? If it stays like this, the speaker is really completely useless for making phone calls....