I find AB impossible to use on a mobile without using Opera browser, due to pop-ups. I have tried changing it several times since, but it is literally unusable too much of the time.
I find AnswerBank is blocked and un-reachable on my I-phone - URL very similar to chilldoubt's above, except for a number of random characters toward the end.
it "spoofs" whichever provider the phone is connected to, so the victim (me) sees a questionnaire related, ie at home I see Virgin, out 'n about I see Vodafone and at work I see the French server our office is connected to.