Back in the early Gingerbread days, CyanogenMod provided geeks and tinkerers with a way of installing the most up-to-date Android version on virtually any device. It wasn't for everyone, but if you were willing to deal with a few bugs and instability issues, you could easily turn your phone into a quasi-Nexus device running stock-ish Android. Updates are a little slower now that commercial entity Cyanogen Inc. is supporting devices, but two of those phones — the Yureka and Yureka Plus — are being updated to Cyanogen OS 12.1, which is based on Android Lollipop 5.1.

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