Sony Looking For 10,000 Beta Testers To Take Android Marshmallow Concept For Xperia Z3 And Z3 Compact For A Test Drive Sony is letting 10,000 beta testers to try out its concept for Android: Marshmallow Edition. Xperia Z3 and Z3 Compact users from selected countries are in luck, as Sony decided on device and geographical restrictions for the program. by Vincent Lanaria