The document provides an overview of the features and characteristics of the products.
This manual covers safety precautions, proper handling, and legal notices for the OPPO U521 flip phone. It explains how to install the battery, power the device on and off, use the keypad, and navigate the menu system, including multimedia, contacts, and settings.
Additional sections describe compatible accessories, PC connection features, health and safety information, and the phone's technical specifications such as dimensions, weight, network bands, battery type, screen resolution, camera, and storage options. This manual is written in Chinese.
| Product Name | GSM双频GPRS功能数字移动电话机 |
|---|---|
| Model | U521 |
| Weight | ≈115 g (including standard battery) |
| Dimensions | 104 mm × 51 mm × 14 mm |
| Network Frequencies | GSM 900 MHz / DCS 1800 MHz |
| Battery | 3.7 V 800 mAh Li‑ion |
| Screen | 2.4" TFT QVGA (240 × 320) |
| Camera | 2 MP CMOS |
| Storage Card Support | microSD |
| Operating Temperature | -10 °C to 50 °C |
No, the phone does not have water‑resistance and should be kept dry.
It uses a 3.7 V 800 mAh lithium‑ion battery.
The device works on GSM 900 MHz and DCS 1800 MHz bands.