Important notes: 1. Before you buy the product, please confirm your mobile phone model again to avoid buying a wrong battery. You can check the model number on the back of the phone. 2. We strongly recommend that you watch the corresponding installation video on YouTube before replacing the battery. 3. Please install carefully. Avoid puncturing the battery, which may cause battery expansion. 4. If your phone constantly restarts and the logo flashes or is not charged. Probably the connection of the ribbon cable is poor. Please re-insert the ribbon cable, check the connector and clamp it firmly. 5. Please make sure to fully charge and discharge your new battery 3 to 5 cycles. 6. Please use your original charger and cable to charge this battery. If you have any questions or problems with our products, please let us know.