Explanation of connection status LED indication:
1. Signal strength status LED’s turned on: router is turning on;
2. 2G and 3G LED’s constant blinking every 1 sec: no SIM or bad PIN;
3. 2G/3G LED’s blinking every 1 sec: connected 2G/3G, but no data session established;
4. Blinking from 2G LED to 3G LED repeatedly: SIM holder not inserted;
5. 2G/3G LED turned on: connected 2G/3G with data session;
6. 2G/3G LED blinking rapidly: connected 2G/3G with data session and data is being transferred
