1. Order ID: If you purchased your phone or tablet online, you can find this ID in the order history of the account used for purchase.

2. Model: You can find model information in the order history of your account, on the box label, on the product back cover label, or in the system. The model number helps us identify the exact brand and model of the product more accurately than the product name.

3. IMEI/SN: IMEI/SN can be found on the box label, on the product back cover label, or in the system, and looks like IMEI: XXXXXXXXXXXXXX, SN: XXXXXXXXXXXXXXXXXXXXX.

4. Fault diagnosis: Before purchasing spare parts, please go to a professional mobile phone (tablet) repair shop near you to diagnose the real cause of the fault, clarify the name and quantity of the parts that need to be replaced, and then fill in the information in the following form and provide the fault photo or video access address to submit to us for reference. We will contact you to arrange payment and delivery.