Huawei EC305/325/355 Data Modem User Manual

About this manual

This manual introduces the Huawei EC305/325/355 Data Modem, describing its packaging contents, required computer configuration, and step‑by‑step installation procedures for Windows and Macintosh systems. It also explains how to connect to the Internet, make and receive calls, send and receive SMS, and manage call records and PC fax functions.

Safety guidelines are provided to ensure proper use of the wireless device, including restrictions on use in vehicles, aircraft, medical environments, and near strong electromagnetic fields. The document also details the approved accessories, electromagnetic exposure limits, and SAR values for the device. This manual is written in Chinese.

What's inside

• Safety Notice
• Package Contents
• Understanding Your EC325
• Installation Guide
• Internet Service Connection
• Phone Call Functions
• SMS Service
• Call Records Management
• PC Fax
• Settings and Information Query

Specifications

Frequently asked questions

What accessories are included in the EC325 package?

The package contains an EC325 Data Modem, a pair of earphones, a CD with the user manual and installation program, a warranty card, and a quick‑start guide.

Can I use any earphones with the EC325?

Only earphones approved by the data‑card manufacturer should be used; using incorrect models may cause device failure.