This is probably because you came from 10.1 and upgraded to 10.2.
Then it locks your phone again, but its easy to re-enable. Updates between 10.2 versions don't lock your phone.
You can just download new updates in your configuration, system submenu of your phone.
Just download and then click install. I never had a problem with it actually (although they are nightlies), sometimes battery improvements are noticable and system improvements, that's really cool.
So, i never experienced a bad release, and i'm always capable of downgrading my phone to the previous release (i download a new upgrade, install the new release and after some days i delete the old installation files).
A lot of days, i just do an update every day at midnight when i'm going to sleep.
One day, my phone went from 1 day battery time to 2 days (after the update from 10.1 to 10.2, somewhere the fifth nightly update i did).
One advice, if you install 10.3 in the future, install GAPPS in your system/app directory first. So you can install it immediatly.
It's complexities like this that I am too old to have time for that would make me more than happy to pay $x/year for a premium Cyanogenmod "subscription" service as floated recently that takes care of all this for you.
I hope I see the battery life improvements, that's one of my main complaints about Android.
Then it locks your phone again, but its easy to re-enable. Updates between 10.2 versions don't lock your phone.
You can just download new updates in your configuration, system submenu of your phone.
Just download and then click install. I never had a problem with it actually (although they are nightlies), sometimes battery improvements are noticable and system improvements, that's really cool. So, i never experienced a bad release, and i'm always capable of downgrading my phone to the previous release (i download a new upgrade, install the new release and after some days i delete the old installation files).
A lot of days, i just do an update every day at midnight when i'm going to sleep.
One day, my phone went from 1 day battery time to 2 days (after the update from 10.1 to 10.2, somewhere the fifth nightly update i did).
One advice, if you install 10.3 in the future, install GAPPS in your system/app directory first. So you can install it immediatly.
I didn't have a problem with rerooting though.