Sony Mobile has released firmware updates for the Xperia M4 Aqua series. The single sim Xperia M4 Aqua has seen build number 26.1.A.2.147 released, whilst the Xperia M4 Aqua Dual has seen version 26.1.B.2.129 released. This is a small update over the prior builds, if you have updated do let us know if it fixes the Stagefright exploit. The updates are live across select variants of each model at the time of writing – we will include FTF firmware links below as they become live.
Sony Xperia M4 Aqua FTF firmware files – Android 5.0 Lollipop (26.1.A.2.147)
Sony Xperia M4 Aqua Dual FTF firmware files – Android 5.0 Lollipop (26.1.B.2.129)