I live in the diamond shaped area between four cell towers and typically have issues with certain brands of phones.
Nexus 4G = very poor (no bars 3g or 4g dropped calls constantly)
Galaxy S3 = above average (2 bars 4gdropped calls every now and again)
Galaxy Note 2 = above average (3 bars 4g(no dropped calls yet)
The bar thing is just a graphical representation, but the call quality sounds a bit better than my S3 did. Only time will tell for me.