Customers on both AT&T and T-Mobile are reporting surprise "mandatory" patches that not only install themselves automatically, then reboots the phone as soon as they're done -- not cool if you were on an important call.
Some suspect it may be a touchscreen responsiveness problems that some G4 users have reported. Or perhaps a security exploit. As of now, we are not sure if this update is specific to TMO and AT&T or if other carriers and countries will eventually get the update. Hopefully, this kind of involuntary update doesn't become a habit. I know I would like to have the option to install or wait.
Source DL