There's quite a lot to the LG V10 - a flagship, a phablet, a camera phone, a rugged phone, a Hi-Fi phone and the first of the new V-series. It's a feature-packed device and its signature feature is the secondary always-on display and a dual selfie camera.The LG V10 provides a nice antithesis of the Galaxy Note5 and S6 edge+. Their sealed back compartments and glass backs (which double the chance of cracks when dropped) make them seem more vain than practical. Also, the Galaxy S6 edge+ does not use its dual-curved screen as a separate control like last year's Note edge did.LG issues a serious challenge to other makers on the camera and audio battlefields with the V10. The phone is also LG's first to feature a fingerprint reader since 2009's GW820 eXpo (not counting the Google-designed Nexus 5X).Time to get started since there's a lot of ground to cover. The bodywork on the LG V10 is quite complex, the software section has to explain why you need a secondary screen and the camera section has a couple of new terms to introduce to the world of smartphone photography.