Google has recently revealed Android 6.0 Marshmallow and it comes with lots of features and improvements. However there few popular devices which have not yet received the Android 5.1 Lollipop OTA update yet.
Some of the devices, which left in cold shed is Motorola’s Moto X (first generation) by Sprint. User’s of Motorola’s Moto X have not received the Android 5.1 update on Sprint, however it seems Sprint has finally begins the roll out of Android 5.1 for their Moto X (first generation users).
Via: Android Police