Rapid Security Responses, according to Apple, may require you to restart your 

iPhone when they go live and will be downloaded automatically by default. 

However, you can disable automatic RSR downloads and simply receive the fixes

with every new iOS software update, as you did in the past. While RSR can be 

disabled, it's a good idea to have automatic downloads enabled so that your 

device is always running the most up-to-date security software. Rapid Security 

texture akin to the grooves of a vinyl record thanks to CNC cutting techniques