How do I change the tracker's password?
Send SMS 'password+old password+space+new password' to the unit; for example, send 'password123456 888888' and the device will reply 'password ok' if successful. The new password must be exactly 6 digits in Arabic numbers, or the tracker will not recognize it. If you lose the new password, you will need to upload the software to restore the original settings.
From the official Gps Tracker 303fg 2 V3 4 Gps Locator manual, page 8
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