If you are looking to update the OnePlus ONE to Android Nougat 7 version then have a look here on the: Lineage 14.1 ROM for OnePlus One, OnePlus One OFFICIAL CM14.1 (CyanogenMod 14.1) ROM, UNOFFICIAL OnePlus One CM14 (CyanogenMod 14) Nougat 7.0 ROM and OnePlus One AOSP Nougat ROM update which are available for the device. With the recently released Android Nougat for the recent Nexus devices: Nexus 6p and Nexus 5x, and after that the Android Nougat Source code release has accelerated the excitement and also within a week we have seen many Android Nougat AOSP ROMs and many CyanogenMod 14 ROMs already available via unofficial builds with the help of developer community, thanks to the Android Open Source codebase.
Status of the Unofficial OnePlus One CM14/AOSP Nougat update:
Developer updateing over xda has brought this Android Nougat Update for OnePlus One (OPO) where most of the features and hardware of this device are functional with this Nougat ROM. This is just an vanilla AOSP Nougat ROM without any crazy hacks or mods. Along with the AOSP ROM, we also have the OnePlus One CyanogenMod 14 ROM for which we don’t have the working and non-working status.
As these are initial builds which means there will be many BUGS known and unknown and of course there are work arounds also available to FIX many of those issues (for the AOSP ROM). If you are interested to try the Android Nougat 7.0 for OnePlus One then try following any of the ROM update link which has complete step-by-step guide.
How to update the OnePlus One to Android Nougat via AOSP or CyanogenMod 14 (Cm14):
If you are looking to update the OnePlus One to Nougat 7.0 then here we have the One Plus One Nougat 7.0 AOSP ROM installation guide and we also have the CM14 for OnePlus One. The guide has basic requirements listed with the ROM download link, link to the development thread in case you want to file bugs for this ROM and a detailed step-by-step ROM update guide.
The AOSP ROM update guide also has a Working and Non-working list which one must not ignore as the Nougat ROM build for OnePlus One is an initial experimental build. But the OnePlus One CM14 ROM does not have a working and non-working status details and hence take backup and be cautious before updating the CM14 update. Also it is always recommended to have a complete backup of all the data on your Android phone or if the phone installed with a TWRP/CWM or any other custom recovery then we recommend to take a NANDROID backup regardless of the ROM build status.