Receive post-sale service instructions and announcement: 1. Each digitizer set we send has been strictly verified in good condition before shipping, so please make sure to check carefully after receiving it. If there is any damage, please contact us within 3 days. 2. Please test the item if it is in good condition before installing or selling, we support returning it if it is a defective product before that. 3. For those digitizer sets that have been installed and caused damage to the appearance or labels, they are out of the scope of the warranty, and the return is not supported, please be kindly understood. 4. For those digitizer sets that have been sold for more than a year, we also do not support the return.