Sony Mobile has released firmware build number 26.1.A.2.99 for the single-SIM Xperia M4 Aqua. Variants with model numbers E2303, E2306 and E2353 are now seeing the update across various regions. If you have downloaded the update let us know what changes you have noticed. The FTF firmware files for each variant is available to download below.
DOWNLOAD FTF firmware files
Xperia M4 Aqua (E2303) 26.1.A.2.99 Central Europe 1 Generic (Android 5.0)
Xperia M4 Aqua (E2306) 26.1.A.2.99 Latin America Generic (Android 5.0)
Xperia M4 Aqua (E2353) 26.1.A.2.99 Singapore Generic (Android 5.0)