Since my family manages to go through phone chargers faster than we empty a loaf of bread, I've bought more of these than I care to admit. Each works absolutely perfectly with both of our Samsung G3s, and our Razr. It's super handy to have a removable USB, because that way it doubles as a car charger. SCORE! Love these! BTW, the chargers are not low quality. We only go through so many because I have teenagers who could destroy a steel ball. Phone chargers don't stand a chance.