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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 ...


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

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 ...


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. ...


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

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) ...


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 ...


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

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 ...


1

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


1

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 ...


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

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.


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.


1

RUUs are linked to carrier and their allocation of devices so it can be tricky to find the right RUU for your device I had a similar issue with my HTC Magic and I used a goldcard method to downgrade the bootloader so that may be a good place to start, don't lose heart it can be done due to the massive amounts of different RUUs out there it can be really ...


1

Do this: Boot into Recovery Wipe cache Wipe Dalvik cache Wipe them again Install your ROM The first successful boot afterwards is going to take a while, as it is rebuilding Dalvik cache. If you are not boot looping here, just let it go for a long while. If it boots a while and reboots, wait some more.


1

Thank you all. I got the Solution here


1

You have to use fastboot. That is all. This is from my command line command history: 532 ./fastboot-mac flash bootloader bootloader-crespo4g-d720sprke1.img 533 ls 534 ./fastboot-mac reboot-bootloader 535 ./fastboot-mac flash radio radio-crespo4g-d720sprkh1.img 536 ./fastboot-mac reboot-bootloader 537 ./fastboot-mac flash recovery recovery.img ...


1

Perhaps you can install Revolutionary, and choose the option to install the Clockwork Recovery Mod, look for a copy of the original Froyo rom from somewhere and then use Recovery to put it back on your phone? Of course, while you're doing that you could check out CyanogenMod v7.1 and see if that gives you what you need.


1

You'll need to use Odin. This blog has a guide for how to flash 2.1. To summarize you put your phone in Download mode, connect it to your PC, load the firmware into the appropriate field(s) in Odin and hit Start. The site has a link to firmware but if it doesn't work try samfirmware.com.


1

Had this problem on 2.2 when I first bought it. Changing SD cards did not help. Resolved by uninstalling some apps. I believe it's a task killer or a launcher that's causing the SD card rebooting few times daily. Try deleting these apps one by one and monitor.


1

Stock Froyo, I assume you mean Froyo with HTC Sense on top of it. You would have to root your phone and then load a Froyo ROM. How to Root HTC Desire See here for instructions to install custom rom: Modaco Froyo with Sense



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