Download and Install Stock ROM On Koolnee Rainbow [Offficial Android 8.1 Oreo Firmware]: Koolnee Rainbow is a 3G Android smartphone.It comes equipped with 5.0 inch HD Screen.It runs Android 8.1 Oreo out of the box.It is powered by MTK6580A 1.0GHz Quad Core CPU coupled with 1GB Of RAM and 8GB Of ROM.It has 8MP rear and 5MP […]
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