FTF Xperia C5 Ultra_E5553_29.0.A.1.55_Australia
This is official stock Sony Xperia firmware
Model: Sony Xperia C5 Ultra (E5553)
Firmware version: 29.0.A.1.55_R4A
Region: Australia (Generic) [1298-3967]
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!