If you're having issues getting your 4G camera light to go blue and stay blue, here are the mistakes:

1. Only shows red light - the signal is too weak, make sure the antennas are securely installed, change the position of the camera or the direction of the antennas
2. Red & blue light alternating - The device isn't detecting the SIM card, make sure the SIM card is properly inserted and is active with a data plan
3. Red & blue light alternating, but SLOWLY - Top up the balance on your SIM card, data limit is reached