Sony Mobile has rolled out a new firmware update for Xperia C5 Ultra. This is still Android 5.1 Lollipop. The update is available for both Xperia C5 Ultra and Xperia C5 Ultra dual with the build numbers 29.1.A.0.101 and 29.1.B.0.101. For now the update is live only in turkey for Single sim variants and available on Nordics, Malaysia and Vietnam for Dual sim variants. Update will go across the world shortly. So wait for the notification to appear. This update contains February Android security release. If you've updated it feel free to talk about the changes.