Depends on the situation:
a. When I'm commuting (walk to bus stop - wait - bus ride - walk home) it's through a bluetooth headset (stereo, not the one-ear type, cause I'm listening to music as well)
b. When I'm working at my desk, I often switch it to speaker phone for the convenience
c. Any other situations (while walking around, at home, etc), I hold it to my ear
Btw, this is for the Dell Streak that I've had for ~2.5 years, which has a dimension pretty much identical to the Note II. I thought for the purpose of the questions they can be regarded as the same thing