Techniques are disclosed for evaluating an ongoing VoIP over WiFi call for purposes of determining when to hand it off to a circuit-switched cellular network connection. 802.11 WiFi call quality values X(i) over a sampled time period (N) of (j) samples for an ongoing telephone call over an 802.11 WiFi communication link are obtained and stored. An instantaneous annoyance value a(j) for each of the stored call quality values X(j) within sampled time period (N) is calculated. A current accumulated annoyance value A(i) by summing the instantaneous annoyance values a(j) is also calculated. The accumulated annoyance value A(i) is compared to a handoff threshold value H(i). A handoff of the telephone call from the 802.11 WiFi communication link to a circuit-switched cellular communication link is initiated when the accumulated annoyance value A(i) is greater than the handoff threshold value H(i).