Sony has begun to rollout the Android 4.4.4 KitKat update for the Xperia M2 (only D2303 and D2306 LTE variants so far). The update moves the build number from 18.3.C.0.40 to 18.3.1.C.0.21. The issue of delayed audio has been fixed. If you have downloaded the update, let us know what changes you’ve noticed below.
DOWNLOAD FTF: Xperia M2 (D2306) 18.3.1.C.0.21_Generic Latin America
Thanks Ben, JIMA and Vinicius!