Hi MarlosEmidio,
To help resolve this, let’s check several important points:
Basic Configuration Requirements:
- Verify that the APN settings match your SIM card provider
- Ensure the time zone is set to UTC 0
- Confirm the SIM card has sufficient balance and data
If the issue persists, please write to us at support@gps-trace.com with the login, unit ID, screenshot of device configuration (SMS commands and device’s answers) and link to this topic, then we will try to check additionally and help you.