✅After receiving the product, you can first compare whether the size is correct and make sure it is correct before installing it. If it is not correct, you can contact us to help you check and solve it. No matter what problem you encounter, you can contact us as soon as possible (use the contact seller), we can provide you with better after-sales service Installation: ①Pls ensure the position of installation can be completely fit the case before install ②Pls use alcohol or agent to clean the position of the installation ③Rive the strong double-sided adhesive of the back, if meet the case of a relatively low temperature, please heating it via the hair dryer or lighter. ④Peel off the double-sided tape, stick it to the installation position and press about 1-2 minutes, finish✅.