9

Generally, phone manufacturers will not allow you to downgrade for various reasons. The stock recovery does indeed validate the update image, so that it's of a greater (or same) version than the installed system. With the Nexus One being a developer phone, you can unlock the bootloader and replace the recovery image with the one that doesn't perform this ...


8

You can find the official Factory Images from Google's Factory Images for Nexus Devices page, and the download contains all that you need to downgrade. Unfortunately, this means you'll lose all data on the device, so be sure to make backups beforehand. Basically, you'll have to download and extract the package, install drivers if necessary, boot your device ...


7

No, you can't downgrade the app. The installation will fail (with error code [INSTALL_FAILED_VERSION_DOWNGRADE] if installed from ADB). Normally, you need to uninstall the app/updates, then install the specific version from the APK, but doing this will also clear the data. There are alternatives to prevent that: If you're using ADB, you can use adb install ...


6

No, the key parts of the ROM would be the kernel and all the drivers for the hardware. The boot image is likely different too. These devices are not the same so you would end up, at the very least, "soft bricking" your device. Even when a device is basically the same, take all of the Galaxy S devices (vibrant, captivate, facinate, epic, i9000), all are ...


5

I finally succeeded !! (YOUHOU!! You can't believe how proud I am !) First of all, I want to indicate that links on XDA (those that goes in multiupload.com, that redirect to lnx.lu), SUCKS! I can't believe it. You have to download a "download manager", with so many related ads and apps you must install. It's a shame. (I am very angry agains't them (lnx.lu) ...


4

Yes, it is possible. One of the advantages of rooting is the ability to control the operating system that resides on your phone. With that control, you can change the version of Android. There are two ways to go about doing this: Flash the stock image https://developers.google.com/android/nexus/images Install a custom ROM. If you know what an operating ...


4

The full guide can be found here but i've included the steps below in case that page is not available. NOTE: All of your personal information, data, accounts and so on will be deleted so make sure you have a backup On your computer Android SDK must be installed: learn how to install Android SDK on Windows, or learn how to set up ADB on MAC OS X / Linux. ...


4

It is unlikely, since the Nexus 9 was a Android 5.0 Lollipop launch device. There are no official (Google developed & distributed) versions of Android 4.4 KitKat for the Nexus 9. Third party roms would be the way to go - but I have found no KitKat roms for the Nexus 9, and I personally doubt one would be developed unless there was a massive interest in ...


4

There is an idea by Firelord in the comment here which I think should work: The best way I think is to have a backup of the app (at least its APK if not the data files; APK of earlier version of an app can also be obtained from some websites (beware of malware) if you updated the app and doesn't have the backup) so that if you end up disliking the ...


3

Download factory image for your device from the official source Extract image (you can use 7zip to extract *.tgz files) Download and install ADB, Fastboot and drivers (install system wide). Download from here: http://forum.xda-developers.com/showthread.php?p=48915118 Connect your Nexus device to the computer with USB cable Turn off your device Boot ...


3

I could have found the solution by myself. Not sure because I haven't tested it yet. For the backup/restore: Titanium Backup (tutorial) For the downgrade/unroot thing: first I could restore Acer's original recovery via Acer recovery installer, then I could downgrade to HC3.0.1 with this I'll give it a try It works perfectly!!!


3

In a way, the answer is Yes. Although, I would not consider any of the sites where you would get the ROM from to be "official". What you need to do is download ODIN3 (or hemidal) and use that tool to flash the Stock ROM on the device. Doing so will most likely require you to completely wipe the device to factory state. I found a couple sites that do have ...


3

If you can enter into Recovery Mode(with Power and Volume Up buttons pressed on startup) try to restore a nandroid backup(if made) or flash a new ROM. If you can't enter into Recovery Mode you need to reflash a stock ROM using ODIN. You need to choose the Right Stock ROM for your region. See XDA-Developers, it also contains a guide to flash these files with ...


3

One way would be to flash a factory image to your tablet, which would restore it to the state it was when you first bought it. Depending on your model (wifi, or wifi + lte), you can find official factory images to for the SHIELD tablet on this nvidia website: https://developer.nvidia.com/develop4shield Following the relevant links, you will get to a ...


3

Bootloader itself will get updated with some firmware updates. Take the Galaxy S6 as an example - the firmware G920FXXU4DPJN comes with bootloader level 4, while G920FXXU5EQF1 comes with bootloader level 5. Samsung has made it so you can only flash the same or a higher level of bootloader by official means, so as to prevent downgrading and exploiting ...


2

1) What is the code name for the Sprint Nexus S 4g which is a CDMA phone but not a the Verizon codename? The crespo codename is the GSM variant of the Nexus S (Verizon never carried it). Sprint's NS4G is simply codenamed crespo4g. 2) Does that link have the proper ROMs for this phone? No, those are all for the GSM crespo version. 3) Other options? ...


2

I found a workaround, Downloaded a firmware from http://www.sammobile.com/firmware/ and updated my galaxy s3 with that using odin. Upon first reboot my phone hangs showing only boot screen with samsung logo for about 2 hours, then I restarted phone in clockworkmod recovery did a wipe data / factory reset and then restarted the phone again, I got the default ...


2

As I already wrote in my comment: A downgrade (as well as an upgrade) can be performed by flashing the corresponding ROM (for references, see other downgrade questions). To find a matching ROM, please see Where can I find stock or custom ROMs for my Android device?. For the process of flashing, you might want to check with the rom-flashing tag, especially ...


2

I don't think the Nexus 7 (2013) ever had Android 4.2. I was going to suggest flashing a factory image but the only one available is Android 4.3 which suggests it's not possible. As the other answers have suggested you will probably need to root to get the USB OTG functionality you are after.


2

Once you get to the USB logo, press the volume up and down together once and it should bring you into recovery.


2

If your device is rooted/unlocked, and you already use a custom recovery (like clockworkmod or twrp), there's no need to downgrade first. flashing the custom-rom will either replace the complete system, regardless of the installed version: usually, the images contain complete "disk images" for all relevant partitions. If, on the other hand, your device is ...


2

If you downgrade, you will need to re-root it again. If you are confident in flashing and using Google's adb and fastboot tools, then could point you to the direction of Google Factory Images for the Nexus. Be aware of the differing versions available, flashing the wrong one could end up messing the device and having to re-do the flash again. You will ...


2

From your question its clear that your phone is rooted. So if you want to go back to CM 10.2 from CM 11 , you need to download stable build from Cyanogen Portal for your device and flash it using ClockWorkMod recovery or any other compatible recovery. Similar to how you done with CM 11. You can backup App Data. But its recommending a clean install.


2

In L, take a backup of things you want to save (photos, videos, app data, etc) Go download a stock rom for your device, such as this one In TWRP, wipe data, system, cache and dalvik cache On your computer use fastboot to flash the system.img Reboot You should now boot into kitkat, without any encryption. Restore any backups you might've had. Note that if ...


2

I have successfully downgraded an app just now. I have the old apk file, but when I try to install the apk, it won't install, because it's an older version (logcat tells me this). I have to uninstall the app and then install the old version. This will lose all the app data, but fortunately I have that backed up too. I ssh into my phone and manually replace ...


2

It depends on the manufacturer and the android version most likely. When there are new system updates, there are also often new bootloader versions available. Those are automatically updated to run on the newest software and provide support for the new android version. The installation of older software packages is often restricted by the newer bootloader. ...


2

Different Locales: It is possible that the different locale is shipped with a different bootloader. This bootloader is responsible for loading up Android and may contain additional checks for stock firmwares before booting. It is also possible that the device was shipped with different hardware (Qualcomm/Exynos processors), so that Android has to include ...


2

1. What is a generic firmware? A generic firmware is the firmware for an android device published by the devices manufacturer. 2. What is a branded firmware? A branded firmware is a firmware customized by cell phone providers to advertise themself by showing their logo, installing apps or adding bookmarks to the browser. Updates for branded phones getting ...


2

The best way would be to manually flash the Google factory images to get to Android 6.0.1, then all the monthly security updates will come via OTA, and when 7.0 comes out, eventually the phone would get that as well. Google Nexus Factory Images


1

Not necessary... No need to downgrade...


Only top voted, non community-wiki answers of a minimum length are eligible