This document is the user's guide for Sony Ericsson GSM 900/1800 mobile phone, which introduces the various features and usage methods of the phone.
This manual explains the main functions of the J300c phone, including making calls, sending messages, using the camera, and accessing entertainment features. It also covers additional functions and provides an index for quick reference.
The guide shows how to assemble the phone, insert the SIM card, charge the battery, and configure settings such as PIN/PUK codes, language, and display options. Troubleshooting tips and warranty information are included at the end. This manual is written in Chinese.
| Network Bands | GSM 900/1800 |
|---|
Open the back cover, place the SIM card under the silver clip, then re‑close the cover.
The PIN code is required to activate network services; it is entered as a series of asterisks for privacy.
The PUK code is listed in the manual under the section titled “PUK 码”.