[Nokia 8.3 5G (8V 5G UW) Guides, News, & Discussion] hikari_calyx:
FAQ and Troubleshooting

Q1. ADB prompts cannot read '/path/to/zipfile.zip' when sideloading!

A1. You're probably using outdated ADB binary (e.g. Minimal ADB and Fastboot). Always use latest Platform Tools from here: https://developer.android.com/studio/releases/platform-tools

Your outdated ADB binary might be installed at following directories. We strongly recommend you delete it before you proceed.

C:\adb
C:\Windows
C:\Windows\system32

Delete these files:
adb.exe, AdbWinApi.dll, AdbWinUsbApi.dll, fastboot.exe

Q2. Can I safely update to newer security updates?

A2. Yes you can. In case it bricked the phone again, rollback with this method.

Q3. The phone gets into bootloop while reinstalling firmware!

A3. To re-enter Fastboot mode, hold volume down key and power key while connected to PC. When the phone displays android one again, release power key immediately but don't release volume down key. Your phone should boot right into fastboot mode without vibration. You may need to try it multiples of times.

Then, re-open 0_OpenMeToInstall.cmd .

Q4: Why we don't recommend you to use "fastboot continue" method to "fix" the phone?

A4: 00WW_3_49E build has following known issues:

* You cannot install APK directly on device. PackageInstaller will crash immediately when you attempt to install APK.

* You cannot install newer OS update.

Those who're staying at 00WW_3_49E can reboot the phone into bootloader mode and follow this method to reinstall 00WW_3_49F update.

Q5: Can I do this under Windows 7?

A5: We can only guarantee it will run under Windows 10 or 11. Take your own risk if you're using Windows 7.

Q6: How to acknowledge if SHA256 is correct?

A6: For Windows users, you can install 7-Zip or it's fork (e.g. NanaZip), and you can find SHA256 checksum feature by right click on the file.

For macOS or Linux users, execute this command:

sha256sum /path/to/package/you/d/like/to/checksum.zip

Q7: What if the PC is infected by Synaptics virus - where executables become into "._cache.fastboot.exe"?

A7: Please look for an antivirus app you trust, do a full scan then restart. It's most likely caused by using USB Redirector Customer Module before from unknown sources.

Q8: I got "This is not Nokia 8.3" error, but I'm pretty sure it's Nokia 8.3!

A8: I'm afraid that you have ignored some procedure. You must install have driver installed properly before you proceed.

Q9: The PC does not detect the device. I got "The USB device returned an invalid serial number string descriptor." in Device Manager.

A9: Open Administrator privilege command prompt, powershell of terminal, execute these commands:

reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\usbflags" /v "IgnoreHWSerNum18d1d00d" /t REG_DWORD /d 1 /f
reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\usbflags" /v "IgnoreHWSerNum18d14ee0" /t REG_DWORD /d 1 /f
reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\usbflags" /v "IgnoreHWSerNum18d1d001" /t REG_DWORD /d 1 /f

After that, use volume key to select "reboot to bootloader" on your phone and try again.

Q10: The phone is listed under Universal Serial Bus Controller as "Unknown Device (Device Descriptor Request Failed)" in Device Manager.

A10: This is caused by following reasons and none of them are related to USB driver:

* USB port on your PC or phone is too loose.

* You're using USB cable with low quality.

* If full-size desktop PC, you're not using the USB port on the rear side. Using rear side USB port is always preferred.

Q11: Something wrong happened when using early version of UnbrickFix package, now I cannot enter Recovery mode and cannot flash anything under Fastboot mode. How can I revive my phone?

A11: You'll have to utilize EDL method at this point. Install prototype ABL by following the topic below. Once prototype ABL images are installed, reboot the phone back to fastboot mode and reopen latest version of UnbrickFix package. Note you don't need to unlock the bootloader, just install prototype ABL.

https://xdaforums.com/t/guide-how-to-unlock-the-bootloader-for-nokia-8-3-5g.4233949/#post-84494863

Alternately, you can request someone who has access of using HDK to reinstall given firmware for you. We don't have or promote such access, please search online.