1. Look at the trademark logo: OPPO mobile phone trademarks are artistically designed English letters, as shown below:

All mobile phone packaging boxes, instructions, warranty cards, chargers, batteries and mobile phones If the OPPO logo on the casing does not match the trademark, it is a counterfeit and infringing product.

2. Check the manufacturer’s name, address, and phone number. Any product that is not marked with the manufacturer's name, address, or phone number, or does not match the above name, address, or phone number, is a counterfeit and infringing product.

3. Check whether the warranty card is stamped. Any warranty card that does not have the red seal or the text on the seal is different is a counterfeit and infringing product.

Note: The warranty card is separate from the instruction manual. The warranty card is a separate booklet with the address and phone number of the nationwide warranty point for OPPO mobile phone products.

4. Check whether the "OPPO" trademark appears on the startup screen. OPPO mobile phones will display the "OPPO" logo on the screen when they are turned on, while some counterfeit and infringing products do not.

5. Check whether the machine has an IMEI number. OPPO mobile phone series products have the same set of IMEI numbers pasted on the packaging box, mobile phone body and warranty card. Each mobile phone corresponds to a unique IMEI number. The IMEI numbers of different machines are different. Anything that does not match the above characteristics is Counterfeit and infringing products.

6. Check whether there is an electronic warranty card registration function. All OPPO mobile phones have an electronic warranty card registration function. Any OPPO mobile phone without this function is a counterfeit product.