Just today, the Galaxy S6 and Galaxy S6 edge received the OTA for Android 5.1.1, making it the first device not Nexus related to get the update. Another phone running Android 5.1, the LG G4, is just behind the curve. Although there is no word on Android 5.1.1 for the LG G4, the latest rumor has the LG G3 skipping Android 5.1 in favor of Android M.
The LG G3 is only a year old and has been running Android Lollipop for some time, but hasn’t been updated to the latest. That may be due to efficiency by skipping over Android 5.1 and jumping straight to Android M (or 6.0). No official word has been outed for Android 5.1, so it seems likely they could bypass it.
Even though this is the latest rumor, don’t get too stuck on the notion. LG could easily swing an Android 5.1 update to G3, but in the meantime we’ll have to be patient. One could safely assume if Android 5.1 is released for the G3, it would hit international variants first.