Sony Mobile has removed the FM radio from the latest Android Concept for Marshmallow release with build number MMB29V.Z1.3571. The reason behind this is that for some unknown issue it caused a conflict resulting in choppy audio over Bluetooth.
The FM radio function is handled by the same chip which also deals with Bluetooth, hence Sony will investigate further and hopes to bring FM radio back at some point later. The update will roll to Xperia Z3 and Xperia Z3 Compact users running Concept firmware over the next few days.
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