Little update is out for each of Sprint HTC One M7 and LG G Flex, both of them the original sets of their series. The new software version for One M7 is 6.23.651.10, while that for LG G Flex is LS995ZVB.
There is nothing else attached to changelog here other than Stagefright bug fix for Sprint LG G Flex, but for the One M7, which had already received the Stagefright fix, the new update brings ‘Google security patch’ and ‘Network connectivity improvements’.
The updates have hit the rollout phase, and you could see a notification regarding the update anytime now.
If not, then be sure to check into Settings > About device, and look for update under system updates.