Xperia ZL_C6506_10.3.A.0.423_USA Generic
Android 4.2.2
Android 4.2.2
Model: Sony Xperia ZL (C6506)
Firmware version: 10.3.A.0.423
Region: USA Generic
Android version: 4.2.2
- download and install latest Flashtool from here
- download also latest Android 4.2.2 for Sony XPERIA ZL
- paste the ftf file downloaded in step c) to folder Firmware included in the XPERIA Flashtool
- open the XPERIA Flashtool, click on flash and choose downloaded firmware, than click ok. Important - if you do not want to delete any data of your phone, just uncheck flashing userdata.sin file. All data will remain in your phone, but sometimes it can cause additional troubles. So it is better (and I recommend that) to do the backup of your personal data, than proceed with clean instalation and then restore your personal data.
- turn off your phone and when Flashtool shows pop up window, connect phone to PC with holding volume down button
- after few minutes all is done and your phone gets the new firmware