The Marshmallow update brings user interface changes, stability improvements, speed optimizations and some bug fixes. One can also manually check for the update by going to Settings ->About Phone -> Software Update. This update is being rolled out over-the-air and hence may take some time before it comes to your device.
Xolo Era 4G was initially launched with Android Lollipop operating system. XOLO has started rolling out the Android Marshmallow update for its Era 4G smartphone in India.
