Vivo V9 Downgrade Firmware
Skye Severy
Generally, it's always best to keep your devices up to date. But unfortunately, over-the-air updates can sometimes break software, change features in unwanted ways, or introduce bugs that the manufacturer may not fix.
If this happens, you should consider rolling back the update that's causing severe bugs in your phone. Switching back to a previous version of Android is generally not recommended, but it isn't impossible. Here's how you can downgrade your phone's Android version easily.
Downgrading isn't officially supported by manufacturers. It isn't easy to do, it may void your warranty, and you could potentially brick your device. You should not try this unless you've got experience modifying your device's firmware.
Whether you can downgrade your device at all depends on whether you can unlock the bootloader. Devices from Google or OnePlus can be easily unlocked, while those from Huawei, Samsung, or Nokia may be difficult or outright impossible to unlock.
You'll have to research your own device, and the process can be even more complicated if you bought it from a carrier. Some carriers require you to get an unlock token from them first or don't allow bootloader unlocking at all.
Once you've backed up all of your data, you'll need to download an Android factory image of the version you want to go back to, and it has to be specifically designed for your device. Google provides Pixel users with a list of factory images. For other phone manufacturers, you'll have to find an official factory image for your device.
You'll also need to download and install the SDK Platform Tools to use the ADB and fastboot tools. You can check out our guide to ADB and fastboot to familiarize yourself with these if you haven't used them before. Lastly, you'll need to connect your phone to your PC via USB, so make sure you've got a good quality cable (the original is preferred if your phone came with one).
We're using a Pixel phone to demonstrate. The process should work on most phones that can be downgraded, but every device is different. Some follow a different set of instructions or require different tools. Check if this is the case for your device before you proceed. The XDA forums we mentioned are a good place to look for this information.
On your PC, navigate to the location where the SDK Platform Tools folder is saved and put the Android factory image you downloaded there. Factory images usually come in ZIP files that contain IMG files; unzip the factory image right there in the Platform Tools folder.
In the PowerShell window that opens, type adb devices to check if your phone is being detected. If it is, you should see its serial number listed. If not, try using a different USB cable.
Once your device is in fastboot mode, now it's time to unlock your phone's bootloader. This is a crucial step as without unlocking the bootloader, you can't install the previous version of Android on your phone.
Depending on your device, type fastboot oem unlock, and if this doesn't work, type fastboot flashing unlock instead. If everything goes well, you should see a confirmation on your device that the bootloader is now unlocked.
Some manufacturers will include a "flash-all" script as part of the downloaded factory image that will automatically flash everything for you. If this is the case, the script should be in the SDK Platform Tools folder along with the IMG files you extracted.
It's a lot less complicated and risky than downgrading, and any bugs or performance issues you may have encountered will often disappear after a factory reset. Plus, you can still enjoy all the features of the new Android version.
If you're dead set on downgrading to an older version of Android, though, you could try installing a custom ROM. Custom ROMs come with improvements over the official software of your device, and developers sometimes keep older versions updated with security fixes.
It's an alternative worth checking out if your phone's manufacturer doesn't provide you with images of older Android software. LineageOS is one of the best custom ROMs for Android, and is well worth checking out.
Hi guys, I see that many users complain about fast battery discharge from 100% to 0% in a day or even less. Reportedly the problem appeared after the firmware update 6.2 and with the FW 7.54 it is still there. All sorts of resets and reboots do not solve it. All IQ apps removed. Garmin support can only offer a substitution for a refurbished item fro 99 USD, which does not look like a solution. Any ideas how to help? Thanks.
Thank you Javen. I think its not the case as according to the threads at the official Garmin forum numerous users noted rapid decrease from 4-5 days to 12-24 hours right after FW update. Anyway I ordered a new battery from Aliexpress, Could not find anything better for a reasonable price. Thanks a lot.
Replacing the battery gave a couple of extra hours (so it can survive a whole night of heart rate and sleep activity monitoring), not days that it should have. Would really wish for an option to revert the software update to a time where battery life was multiple times longer. It's just a class action lawsuit waiting to happen.
I use vivoactive3 for golfing and even if I charge it to 100% full before heading to the golf course, the battery dies before I can finish the game. Very frustrated with such short battery life: I bought it only one year ago.
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