This is official stock Sony Xperia firmware
Model: Sony Xperia M4 Aqua (E2306)
Firmware version: 26.1.A.1.112_R4A
Region: Latin America (Generic) [1294-3902]
Android version: 5.0
Download Here
Warning...!
Always backup before flashing..!
I'm not responsible for any damages will be held!
Do at your own Risk!