First time poster here, I'll try to make this as concise as possible.
Short / TLDR Question: My Sony Xperia Z handset isn't able to install the 10.31.a.2.67 patch either via WiFi or the Sony Companion. Any ideas appreciated.
Longer Version I've recently picked up Sony Xperia Z to replace an older one that I'd damaged in stag do celebrations. Research indicated it would be cheaper to get a new one rather than spring for repairs. The OS version on the replacement is 4.1.2 with build number 10.1.a.1.350. It's a pre-owned one and looks like it's had a soft reset from the settings menu. I've run through and installed the stuff I need, configured it preferred but the last thing I can't do is to install the patch. I'm led to believe that the phone has been developed against as
1 - Plugging it into a desktop via the USB led it to enter debugging mode
2 - There is a root viewer application on the handset
3 - Developer options were turned on
I've tried to get the patch installed a number of times but to no avail. It'll download something (as shown via the GUI) but upon restart all I see is the Xperia logo, a successful boot and then the error message to state it won't install. I don't have access to any log files or error messages to let me take this further.
Because of the above, I'm thinking that a previous developer has possibly something to stop any further patches installing? The fixes I've tried this far: -
1 - Updating the patch from cable doesn't work. The Sony Companion can't detect the phone when connected via the USB
2 - Checking that the default applications are installed.
As such, I'm not sure where to turn next. Any ideas would be appreciated.
Update: I work as an IT professional and as such I'm comfortable with devices and operating systems. I'm not used to development or the sort of development that's involved with android devices.