LG today released a new software update build H81520p for the LG G4 H815. As you can see from below table, The Update is arriving O2 LG G4 H815 as software version H81520p and brings March 2017 Google Android Security Patch onto your LG G4 H815
The TELEFONICA LG G4 H815 (TLF) also received the update today. H81520p_00_0314.kdz [TLF]
It seems that the LG G4 H815 in other countries will also get the update soon. The Stock kdz firmware for O2 LG G4 H815 is available for download from below link.
Buyer Suiffix: 02U
Software version: H81520p_00_0314
If you experience any isues with the update, please let us know in the comments below.