I had purchased this band three months ago. I was happy with first two month after second month it started its defectiveness sign. It sometimes doesnt show anything on the display and sometimes hang. The major problem is that this band is made of silicon and thus it irritates much on hand. If worn for more than six hour there are rashes on hand.
I had gone for the problem in service Centre they told it is not done here and that product warranty is not much. I was shocked to see that. The band worth Rs 6, 000 is in that condition. The main problem now is as now Sony phone model are closed most of the service Centre are also closed. I suggest you not to buy this product. For fitness none other than you will know of yourself.