Cel-Fi DUO/DUO+ Step by Step troubleshooting Guide (SBS 22) December 16, 2019 15:52 Updated Flashing green power indicator on Network Unit. You have a flashing green power indicator on your network unit. Do you have bars of cellular coverage? Bars No Bars Related articles Cel-Fi DUO/DUO+ Step by Step troubleshooting Guide (SBS 24) Cel-Fi DUO/DUO+ Step by Step troubleshooting Guide (SBS 23) Cel-Fi DUO/DUO+ Step by Step troubleshooting Guide (SBS 15) Cel-Fi DUO/DUO+ Step by Step troubleshooting Guide (SBS 16) Cel-Fi DUO/DUO+ Step by Step troubleshooting Guide (SBS 21)