This is the Official ATT LG G5 H820 User manual in English provided from the manufacture.
Those who are interested in this LG G5 can download the G5 user guide from below link:
Download AT & T LG G5 H820 User Guide
The ATT LG G5 H820 user guide in Spanish is also available for download via this link:
If you need to contact LG USA Official Support team, visit this link.,