  We present an updated study of charm mixing and the relative strong phase
between doubly Cabibbo-suppressed D0 --> K+pi- and Cabibbo-favored D0bar -->
K+pi- decay amplitudes using 3 x 10^6 quantum-correlated D0D0bar pairs from 818
pb^-1 of e+e- collision data collected with the CLEO-c detector at E_cm=3.77
GeV.
