Blu Phone Sim Card Not Detected. For the latest smartphones like blu g9, blu g8, g90, and g9 pro, the sim card slot can be opened via ejector pin because the back cover isn't removable. How to block a contact.
First, check the phone whether it is charged or not. Sim card manager > tap one or both of the switches for the sim or usim cards to activate them. You could also turn off your phone and turn it back on and see if it works.