[Sony Xperia 5 III] godsplannned454:
Xperia 5 III US Root Experience Guide ADDON

*If you have a bootloop from original tutorial read below

You only need to read/do section 1,2 and 4 for rooting with magisk (If everything goes smoothly)

Grab software needed from section 1

Windows 10/11

Xperia Bootloader Unlock Key

Platform Tools (Fastboot & ADB)

Fastboot and Flashmode Drivers

(When installing Check fastboot and flashmode at the top and scroll down to your phone model)

Xperifirm (Select phone model and download firmware select US)

Unsin

Magisk APK

Backup of phone (Unless you don't need to save any data)

Follow step by step section 2

IF YOU FORGOT TO GET YOUR BOOTLOADER UNLOCK KEY JUST ENTER

fastboot reboot

to exit out of fastboot mode

Follow section 4 until step 3 then do steps below

3.1 Download xperifirm and open it, select phone model and download firmware (Select US)

*It might take a long time

3.2 Open the firmware folder and look for boot_X-FLASH-ALL-XXXX

3.3 Drag to unsin folder

resume steps from section 4

but *don't do step 6 (beta channel)

*don't enter fastboot flash boot_b magisk_patched-XXXXX_XXXXX.img (only a)

*don't enter fastboot -w

Once rebooted, setup your phone and open up magisk (It should be installed by default)

It will prompt you to update magisk (Press yes)

You can check if your rooted by downloading a root checker through app store

Congrats you are rooted

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[READ BELOW IF YOU HAVE A BOOTLOOP]

*saying your device is corrupt with blue text (disconnect from computer then turn off the phone by holding power and +up volume) It will vibrate 3 times once off

*saying device corrupt shutting down in 5 seconds repeating boot (disconnect from computer and let it shutdown)

Once phone is off enter in fastboot mode (hold +up volume while connecting to computer)

Blue led should be showing

enter the commands from section 6 (If you still have the command window open you can just enter the last command)

cd\

cd platform-tools

fastboot oem lock

Follow section 7 step by step

*Xperia companion will fail the first try, all you have to do is disconnect the phone and retry the repair

! Factory reset your phone and do software repair through xperia companion to help cleanup any corruption from bootloops !

I ended up having to factory reset my phone and software repair because of random restarts from software corruption ( DETAILS IN UPDATE 7/20/21)

At this point you can decide if you still want to root your phone or ditch this process

PS:

This tutorial is just my experience from trying to root Xperia 5 III US model

I tried following the original tutorial step by step but kept getting bootloops

I'm not sure if flashing boot_b is important but my phone is rooted without it

(IM NOT AN EXPERT JUST TRYING TO HELP)

UPDATE: APRIL 4/30/21 BELOW

Kept getting random restarts, phone is on Android 12,

(screen/phone would freeze then restart nearly daily randomly)

*Turn off device battery care and uninstall battery care apps to stop the random restarts

Hopefully this gets fixed in future updates

UPDATE: JULY 7/20/21 BELOW

Random restarts did occur less often with battery care turned off,

but I still kept getting them on and off when using google maps or messages

I ended up completely factory resetting my phone, removing root and

doing a repair with software companion twice.

I then followed my steps again for rooting

This seems to have fixed my problem of random restarts on Android 12 while rooted it been about a week so far and no random restarts.