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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 ...


7

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 ...


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 ...


4

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

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

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 ...


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

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 ...


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

No, performing a factory reset won't affect your HBoot version. You should, however, be able to follow this guide instead (which uses Revolutionary). There's another page with instructions here which describes in a bit more detail what Revolutionary does and where to go from there. The standard disclaimers with regards to possibly bricking your device ...


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

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 ...


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 ...


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

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

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

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

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 ...


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. ...


1

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


1

this might helps. http://android.stackexchange.com/a/50728/39466 Pretty much details process from XDA forums http://forum.xda-developers.com/showthread.php?t=2010312


1

Which version is your Nexus 4 running on? 4.4 (KRT16S) or 4.4.2 (KOT49H) Check by going into Settings > About > Build Number 4.4.2 (KOT49H) is newer and fixes a lot of the bugs from 4.4 (KRT16S). You might try updating if you are running a lower version. You can revert back to 4.2.2 (JDQ39) via: factory reset manual flash (stock image here) a ...


1

This guide is marked as "noob-friendly". Haven't tried it myself as I try to stay far away as I can from Sense: http://forum.xda-developers.com/showthread.php?t=1859714 You were looking for 3.20.401.1? Here you can find the Nandroid Backups: http://forum.xda-developers.com/showthread.php?t=1975140


1

Galaxy S Duos was released with the ICS onboard and there is no Gingerbread available for this model. You shouldn't use a firmware designed for other devices from the Galaxy family - this is an easy way to brick you phone. "Getting Prepared" instruction is irrelevant.


1

If you can find an original stock ROM for your device (I assume your device is not rooted etc.), or any fitting custom ROM (in case it is rooted etc.), you could factory-reset your device and then flash that ROM. See Where can I find stock or custom ROMs for my Android device? for available ROM sources.



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