My Galaxy S3 did not want to load. After a tour by the VAS (who would not take charge because oxidation ...) I tried various web tutorial to correct the problem. After dismantling the S3, I scraped the USB connector, it worked better but randomly ... Having heard of this product on a forum, so I tested. After dismantling, once the product to the USB jack on the phone, a tooth brush, and then a new product. I waited 15 minutes before starting the manipulation. Since the S3 handles perfectly again! Stroke of luck or miracle product? Overall I am very spot.