I found this thread and it has a bunch of firmwares but not for 18.3.1.C.1.13 (which I have). Is there any problem if I flash another one, e.g. 18.0.C.1.17? If there is, can anyone show me the 18.3.1.C.1.13 FW? I'm searching this for quite a time.
I can't find a method to root my device, it's always for D2303 or D2305, and when I finally find something, the build number is different.
Xperia M2 D2306 4.4.4
Build number: 18.3.1.C.1.13
Locked bootloader.