There’s no leap of imagination needed to expect the arrival one day of a T-Mobile “G2” Android-based smartphone, an expected though still hypothetical follow-up to T-Mobile’s popular G1. At this point, however, one does need some imagination to guess on a delivery date and describe a possible feature list. A variety of rumors have been swirling around the Web, citing anonymous sources in reports that have, for the most part, been appropriately labeled “rumors.” Cell Phone Signals credits an anonymous tipster with a Jan. 26 announcement date.