The OnePlus One is legendary in the Android Community. When it launched in 2014, with the flagship Qualcomm Snapdragon 801 processor and a very low-price tag it shook the high-end Android market. You could not even buy the smartphone at launch unless you had an invite from OnePlus. It had a 5.5-inch display with a resolution of 1920 x 1080. It featured up to 3GB of RAM and 16GB of storage. For its camera setup, it had a 13MP camera at the back and a 5MP shooter in the front.
It launched with CyanogenMod 11S based. Android 4.4.2(KitKat). CyanogenMod was once the most popular custom ROM for Android devices. It reached such levels of popularity, that it started coming pre-installed with some handsets, such as the OnePlus One. Some of the features that it made so popular were an in-built theme picker, ability to make changes to the notification tray and quick bar settings. It basically gave you more control over your device. Having a custom ROM also meant that you could get rid of all the pre-installed bloatware.
The developers behind CyanogenMod eventually started a commercial version called Cyanogen OS, which gave OEMs more control over the firmware and pre-installed software. Overlooking these operations was Cyanogen Inc. which was started in 2012. But the company did not last for long and shut down in 2016. But luckily for us, LineageOS came out soon after as the new version of CyanogenMod. And since then it has been available for more than 100 devices, including the One Plus One.
The OnePlus One (codename: bacon) has always enjoyed great custom ROM support due to its massive popularity, so there are also a lot of other custom ROMs available too. Today OnePlus One will be excited to learn that the Official LineageOS 17.1 (Android 10) for OnePlus One is finally out. This is quite impressive, given that the device is six years old now. Users can download the build from the official LineageOS website.