Software updated failed

[Stavros-m]

I got today the update for 5.1 on my phone,it was charged 55% and after downloading,i pressed install...for some reason the software update failed and now i can't boot the phone,appearing an ''error'' message with the andoid icon at the top,what can I do?I bought the phone last month

[lanube]

Hi @Christofer.

My device is a 5303, with unlocked bootloader and root access. Any chance of update to Marshmallow?

[Mahmoudhsn]

My phone is sony Xperia c4
I have tried to update software more than one time using wifi network but, Every time after download finish it says {cannot update software}.
Then tried to download it using pc companion, it also failed
Then restored factory reset and tried to update it but no way
Please if you can help tell me what to do
Thanks

[Uliwooly]

@Mahmoudhsn

You've asked this question a month ago

http://talk.sonymobile.com/t5/Xperia-C4/Software-updated-failed/m-p/1178176#M2267

Use XC instead

Xperia Companion (XC)

Software Repair Guide

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

[Montezuma1]

When I download the new software update for my C4, I press install, phone reboots and then android icon appears so I think everything is OK, BUT THEN installation process stops, phone turns on and I get a pop up message: installation of new update failed, please try again later. HELP! I was told that the new update would solve some of my screen problems( lagging when I scroll down and there's a video on FB, etc..generally screen goes crazy when scrolling through videos anywhere..)

Thanks in advance..

[Abhikhatri]

How too software update