USGlobalsat GTR-128 - Manual (Page 5)

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1.4 Appearance
1 LED
2 For fixing device with Velcro tape
3 Hook for screw/ unscrew back cover
1.5 LED indicator
Normal mode:
LED status Description
Red blinking Device is being boot and SIM card not
ready
Red solid SIM card ready, but GSM not registered
Yellow solid GSM registered, but GPRS not connected
Green solid GSM registered, and GPRS connected
Hiding mode: Device would blink red light while it is being boot. After completing the boot, all
LED would go off.
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