User's Manual

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If there is no SIM card inserted into HRT500, there are two icons shown on the taskbar.
Before GSM module is configured, this icon, - GSM OFF will appear on the taskbar.
After the GSM module is configured, two new icons will appear on the taskbar. Both of the
icons show the status of the GSM module of the HRT500.
No GSM service
No SIM card inserted
2G Service
3G Service
Coverage of GSM
Empty means low while full
means excellent