When the OnePlus One debuted back in 2014, it was sold as an enthusiast phone with insane bang for the buck. Fast forward four years, and Android 8.1 Oreo in the form of LineageOS 15.1 has just been released for it. The OPPO Find 7a and Find 7s and Galaxy S5 Plus/LTE-A are getting 15.1 as well, and the Huawei Ascend Mate 2 4G has returned with LOS 14.1.

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