Version H63110i is a new update that has begun rolling out for T-Mobile LG G Stylo users. It’s based on Android 5.1.1, and brings in ‘messaging security improvements and user experience improvements.’ That’s all T-Mobile says, but it essentially means that H63110i update fixes Stagefright bug, among other things.
T-Mobile has already fixes the said vulnerability on its high end devices like Galaxy S6 and Nexus 6, so it was about time less popular devices received the crucial bug fixer update too. If you haven’t received the update yet, try to grab it through Settings > About device > System updates. Tap on ‘check for update’ button to try your luck. Come August 30, the update will be available on mobile data too, as it’s Wi-Fi-only thing right now.