When Android 6.0 was announced last year, Sony Mobile was one of the first tech manufacturers to announce its readiness to update to the new platform. The company even stated that a number of the its flagship lineups would be making the Android Marshmallow jump straight from Android 5.0 Lollipop.

However, recent reports suggest that Sony Mobile might have jumped the gun a little and instead released an Android 5.1 update to some of its iterations. The Xperia C4 and C5 Ultra were previously listed to receive an Android 6.0 update straight from Android 5.0, but instead got Android 5.1 Lollipop.

According to Gadgets by NDTV, the jump is considered by Sony Mobile as a major update. The industry follower stated that since it would be an update-heavy file, owners of the Xperia C4 and C5 Ultra are recommended to update their devices over WiFi, either as an automatic OTA update or manually via the Sony PC Companion app. In addition, a manual OTA update can also be initiated by checking the Software Update option in the Settings > About Phone tab.

Meanwhile, Android Police said that with the way Sony Mobile decided to pursue updates to some of its flagship products, it might be some time before owners of the Xperia C-series phones get their Android 6.0 update.

While Sony has its own beta test program for new Android platforms (Android M is currently undergoing beta tests for the newer Xperia Z series), the pattern for Xperia C series Android update is slow. Android 5.1 Lollipop was released almost a year ago by Google.Since it is only now that Sony decided to roll out an official version update, the industry follower thinks that an Android 6.0 update by this time is impossible, and Xperia C4 and C5 Ultra owners might even get their Android Marshmallow updates as late as next year.