A. Try reinserting the SIM card.

B. Restart the device.

C. Switch network standards.

D. Ensure the correct APN name, username, and password are entered.

E. Verify if the SIM card can access the internet.

A. Check if the built-in antenna is properly connected.

B. Ensure the radio protocol and frequency match the base station.

A. Check the PDOP limit and height cutoff angle.

B. Ensure the satellite reception environment is good.

C. Avoid using the device during thunderstorms.

Log in to the website - Go to "File Management" - Select the date - Download the static raw data

Refer to section 2.5 of the Device User Manual.

Refer to Chapter 2 of the Device User Manual.

Login Web Page - "Advanced Options" - "Network Link" - "Network Status" - Check whether the mobile network status is displayed online.

Log in to the web page - "Other Configurations" - "System" (check to enable, not check to close)

Refer to section 3.12 of the Device User Manual.

Go to "Project" - "Data Import" - Select data format and parameters for import - Click "Next" - Locate the file to be imported - Click "OK"