i do not believe there is a defect in the Z hinge for some of the g2s. i believe the phone is just built like it. to me, yes its a minor inconvience but it really isnt anyting to return the phone. when i first received my g2 it was tight, and the sliding was great, but after a few hours it began to slip. i want to know, if your g2 having a loose hinge? if so, maybe i could take mine to a store for an exchange but i just think its going to be loose.