Is it worth to update from a rooted android 4.2.2 c6603 to higher versions?

[homo XDAus]

Don't ask why I stayed so long on 4.2.2, did PhD and the phone was running nicely and hat no time to update, root again etc. pp. Now that the PhD is finished I wonder if it is worth at all to invest the time to update to higher version. It looks like 5.0 was the last update supported by sony. I don't have a custom ROM, just rooted original Sony firmware with flashtool.

In general I don't see a personal benefit to buy a new phone. Keeping the Z and updating to the best Version or custom ROM running smoothly on the old hardware and which can be rooted is my choice.

Which version and ROM do you suggest?

Thank you for your time and advise

 

[Zerikwan]

It depends on what you need.
If all you need is a durable battery, then better stay on 4.2.2, but you know...as time goes by, most application will stop their support for jellybean.
If you want more performance, then 5.1.1 is the choice, but not battery friendly. STAMINA mode is present to help saves some battery.
For the best updated OS version, go for LineageOS 14.1. It's based on nougat 7.1.2.

 

[homo XDAus]

Many thanks, as far as I remember I can do a image with CWM of current system and can give LineageOS a try! I saw now that some modern apps need at least jellybean 4.4 to be installable. Battery shouldn't be a problem, I rather want the camera to work nicely also under a customROM, actually I think the original Sony camera app is quite good and this one I would loose. All other Sony apps I never noticed really. For all the other possible customROM I don't really have the time to study them, camera would be most important. I guess recovering most of the apps from jellybean 4.2.2 to Lineage via Titanium Backup will work so I can check this fast?

Thanks in advance!

 

[OfficiallyAhmad]

You can also try to use RR Oreo if you like the latest Android.
https://forum.xda-developers.com/xperia-z/development/rom-resurrection-remix-o-6-0-0-t3747588

Here what I think about it:
https://mastodon.social/@ahmd_amsyr/99954433452073565

 

[homo XDAus]

Hmm, I installed lineage 14.1 zip via ROM Manager and it was succesful, but then I also wanted to add directly after this the optional lineage root. The phone was already rooted and unlocked and when pressing the option, the screen went immediatley black. When pressing power button the lamp is short igniting green/red and screen stays black. Installed the newest flashtool and flashtool drivers, but when trying to root or flash the xperia z again via flashtool, it always says in the flashtool log, the driver is too old under Win 7 and Win 10 on 2 PCs. I installed pc companion and additionallly the flashtool drivers.

Do I have to install distinct versions of flashtool and drivers? Flashtool is version 0.9.24...?

I could manage to get it in boot loop now, showing sony logo. But with same flashtool it's not possible to flash ftf in flash or fast boot mode, because it is constantly rebooting. What to do now?

https://forum.xda-developers.com/xperia-z/development/kernel-ub-t3198491

this does not work

https://forum.xda-developers.com/xperia-z/general/disaster-recovery-getting-z1-zu-z-zl-to-t2229250

also doesn't help

Still would like to install lineage.zip again. But how do I get the device booting normally and is the rom manager stil alive? If not I can also flash directly via flashtool a .ftf?

 

[homo XDAus]

Nevermind, I could repair it, now on 5.1.1 stock.

 

[homo XDAus]

as someone asked per pm:

I'm also not sure what changed it. I went then to very old flashtool version on my old notebook, probably over 5 years old when I flashed my xperia neo smartphone. With this it worked. Flashtool version is one point. My bootloader was unlocked. The flashing of lineage 7.1.1 also worked, I then made the error to root also via Lineage package directly after flashing the rom, then I was in Boot loop. It's best to start flashing, let flashtool compile the zip, this takes some minutes, progress shown in flashtool, and then you connect via usb smartphone, especially when in boot loop. But start with different flash tool version and post your error messages in the thread i posted. I stil have the old xda tabs in my browser history that helped me to install ics on neo and lollipop on xperia z (and it is really fast again after complete reinstall) no need for new phone

 

[pawel112]

I flashed to LineageOS 7.1.2 and I do not regret it. I have the (almost) latest version on Android. I can manage the apps permissions and it all works great.