I now have another annoying 'feature' to report - the best way to describe it is the keys sound 'scrunchy' when pushed / clicked or even just a finger run over them! Doesn't affect the functionality. It's as if the keypad membrane has become loose and is moving over the keys - but it hasn't. The sound is akin rubbing a thin plastic bag between your fingers. If I roll my thumb side to side on the keypad it goes away for a bit.
Still getting the send key sticking so methinks this phone will be going back soon :-(