I am using Google Fi and traveling in Germany without a pc. I can't risk losing my sim activation because it can only be reinstated in the US. I looked at Wugfresh's Nexus Root Toolkit but I am not sure that is the way to go or which option to use.
Again, thank you both for your response.
I downloaded the security update, clicked install and the phone begins the install process by rebooting. However, it loads the teamwin screen.
I clicked reboot, but that did not install the update.
Your assistance is greatly appreciated.