Sony Xperia ZR LTE C5503

firmware for xperia zr :

to download android 5.1.1 click her 

to download android 5.0.2 click her 

to download android 4.4.4 click her

after you download the firmware change .rar or .zip to .ftf

flashtool for xperia zr :

to download flashtool for windows click her