Due to different processor, there is change in id.That cause trouble in connecting device in adb. Instead driver are install ,but u cant interface with ur device.So here a simple tutorial to get this fix. If driver are not pre-install just watch this:https://www.youtube.com/watch?v=8AkB8JPpxZk I have tried here this on Xolo era spredtrum device (sp7731) and worked....