Sony Mobile has rolled out a new firmware update with the build numbers 26.3.A.1.33 and 26.3.B.1.33 for Xperia M4 Aqua and Xperia M4 Aqua Dual. This is the first firmware update which rolled out after Android marshmallow. So this will replace the previous build 26.3.X.0.131 from the new build 26.3.X.1.33. This includes the July security patches which will replace the previous April security patches. So far the update has rolled four for all the variants except E2312. Be patient if you haven't received it. It will be available for your region shortly. So if you have updated to this build share the impressions with us.