Instruct: Classify Amazon reviews into positive or negative sentiment
Query: FOUR PURCHASED - NONE OF THEM WORK

DOES NOT WORK WITH iphone contrary to the claims made. Itunes is unable to connect through this cable and iphone identifies it as 'Accessory not supported'. If you plug this into the iphone charger, the iphone does not charge. So net-net neither syncs nor charges iphone. A total waste of money.