OPPO is technology company which manufactures mobile phones. See below the list of devices that are manufactured by OPPO.

By the way, maybe you are looking for OPPO user agents?

Mobile phones:

• A33
• A37
• A3s Dual SIM
• A57 Dual SIM
• A59
• A71
• A77
• A83
• F1 Global Dual SIM
• F1s
• F3
• F5
• F5 Dual SIM
• F7 Dual SIM
• F7 Youth Edition Dual SIM
• R11
• R7s
• R9s
• Realme 2