NYC iPhone Repair provides a top of the line warranty on our work. We offer a 90 day limited warranty on all parts that were replaced by our company. If the part goes bad or faulty within 90 days and we can reproduce the issue, we will replace it again at no charge. Although we cannot offer the warranty on cracks or damage done to the device due to another drop, we do service the part we changed at no cost if it gives you an issue. NYC iPhone Repair does not charge you for a device that is not fixed. If you bring in your device and are paying for it to get fixed, we believe it should be fixed not just diagnosed. We only charge you once the device and part we replaced is functioning, as it should be. If you have any questions, please call us now, (212) 295-7926.