I have a LG Nexus 4 android, few years old and its been jailbroken on stock but I haven't been to fix it and neither receive any updates. Have been stuck on jellybean.
Well if it's rooted (jailbroken is iphone term) you won't get updates as you are not running officially released version of android, that is if you loaded another rom on the device.
Is it stock android and just rooted?