G4 is a trademark of LG Electronics, Inc. s Instructions to perform tasks in this guide are based on the default settings and may. this owner's manual carefully and retain for future reference. Should the unit require maintenance, contact an authorised service center. This is the Instruction manual for the Argos Product Sim Free LG G4 Mobile Phone - Grey (506/5923) in PDF format. Product support is also available. G4 Stylus - LG H635 - read user manual online or download in PDF format. Pages in total: 93.View and Download LG G4 user manual online. G4 cell phone pdf manual download. Manufacturer, LG. Type, user guide PDF. Pages, 218 Pages. Updated, Sep 3, 2021. Category, Cell Phone · Download Manual (18.21 MB). Related Manuals.