I recently acquired a Nokia 6.1 phone after the zte blade v8 pro debacle. After the August security update this phone has refused to connect to WiFi or cell signal while my sim is installed. Before I would be able to restart the device and it would regain cell service. Now it only retains signal for a couple of seconds and then proceeds to tell me that there is no sim, the broadband version is unknown, no WiFi, cannot change any settings relating to connections, and will continue to display full bars and state there is no signal. This is very frustrating.