Sony Xperia ZL LTE C6503

firmware for xperia zl :

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 zl :

to download flashtool for windows click her