I bought one a few weeks ago. For the first few days after I bought it it seemed to be working and it was fab to see how many steps and activity points I could get. But it seems to have stopped counting? I am going to send it back to ww customer services for a replacement - but just wondering if anyone else has had any problems? Where do you wear yours? I have tried it in loads of different positions on my waist band and in my pocket and its just registering.