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[Q] when rooted android, can lose official android os?

hi i am newbie
I bought samsung galaxy note GT-N7000 (THL). now i just upgraded android os official from 2.3 to 4.0.3 official throught samsung kie software. I wonder. if i want to rooted this android 4.0.3, so when samsung release new official android os, so i can upgrade throught samsung kie like before?
another problem is: Which open source softwares can backup whole app and android os and kernal without rooted device?
thank you

I'm fairly certain that you can update your device through official forums once you've rooted it. You may have to root it again after the update though.
Also you'll only get over the air updates if you keep the stock rom and bootloader, if you install something like clockwork recovery you will not be able to get your updates.
I know that the premium version of titanium backup can backup data from your apps but you definitely need root access to back up the full app.
Spend some time reading through the forums for your device, try searching around a bit, you may find that a custom rom is appealing, in which case you can root, backup your apps and get a better device.
Good luck!
Sent from my Blade using xda premium

Noob questions..

Hey guys, I just got my galaxy nexus a few weeks ago and I really want to flash the new jelly bean os on my phone.
I live in Canada and i'm currently locked to a Canadian carrier, fido(owned by Rogers) .
Before I begin I just have a few questions.
1.) if i decide to flash this new os, will I need to worry about my phone being locked to certain carriers? Or does it automatically unlock that as well?
2.) I did a nandroid backup, but if i format data using cwm. Will that backup still be here for me to restore from?
3.) do all roms have root access, or is it only certain ones?
Thanks
Sent from my Galaxy Nexus using xda app-developers app

Use the guide in the section of galaxy nexus.

Please read and search before you ask something !!

[Q] I need to Revert back my samsung galaxy 3 device to old 2.1 version.

Hi all,
I am an android developer, i bought samsung galaxy 3 device a year back, now i thought to upgrade it to ICS os. So i searched XDA developer site and successfully installed ICS 4.0.3 using ODIN multidownloader.
Thanks for the great tutorials and stuff.
Now i would like to revert back to 2.1 android OS on to my device. How can i revert back my device to run same old Operating system.
Thanks in advance,
Sathish avunoori.

When the dev didnt know the answer,how can we know about ut. Pkus i started using android since gingerbread. Saw that 2.1 on a htc hero phone.
Sent from my GT-N7000 using xda app-developers app

[Q] Question about rooting Galaxy Note II (AT&T SGH-I317)

Downloaded the toolkit from this thread: http://forum.xda-developers.com/showthread.php?t=2052779
I have the AT&T SGH-I317... unfortunately, the toolkit lists the Android version of my phone as 4.1.1, but my phone automatically downloaded and installed 4.1.2 the first time I used it the other day. My question is, do I need to wait for the toolkit to be updated with 4.1.2 for my specific phone, or alternatively, would it be safe to use the 4.1.1 version in the toolkit, or use one of the other ones listed as version 4.1.2.
I'm perfectly happy to wait if necessary. Don't want to take any chances of messing up my new phone. This will be my first rooting or unlocking of any kind. I'm an adept PC user but phones are new territory for me.
So, if someone knows how I should proceed, I'd be very grateful for the assistance. I'm asking this here because I'm a new member and can't yet post in the developer forums.
Thanks!

I haven't tried the toolkit since the latest update. I know the Sprint version has CF-Auto root. Check your thread for that one. It worked for me after the 4.1.2 update with no issues.
Edit: link http://forum.xda-developers.com/showthread.php?t=1980644
Sent from my SPH-L900 using xda app-developers app

I seriously need help with this

Okay, so my Android 4.3 AT&T Galaxy S4 is rooted (through Kingo) and the only reason I did it in the first place was to flash CyanogenMod or some stock Android variant. Now I'm being told I can't install a custom recovery on my phone for two reasons. 1) AT&T locked the bootloader 2) I'm running Android 4.3.
Now, I'm considering unrooting my phone but even that's unclear and confusing, and it's hard to find people on these forums who are willing to help with these relatively simple (to the non-newbs, of course) things.
Can I flash a custom recovery? Can I run CyanogenMod or any good ROM? If no, will I be able to, ever? If no, how do I unroot? Would it be wise to just wait for the next update from Samsung or AT&T and install it so I automatically unroot?
Much appreciated.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app

drooskiii said:
Okay, so my Android 4.3 AT&T Galaxy S4 is rooted (through Kingo) and the only reason I did it in the first place was to flash CyanogenMod or some stock Android variant. Now I'm being told I can't install a custom recovery on my phone for two reasons. 1) AT&T locked the bootloader 2) I'm running Android 4.3.
Now, I'm considering unrooting my phone but even that's unclear and confusing, and it's hard to find people on these forums who are willing to help with these relatively simple (to the non-newbs, of course) things.
Can I flash a custom recovery? Can I run CyanogenMod or any good ROM? If no, will I be able to, ever? If no, how do I unroot? Would it be wise to just wait for the next update from Samsung or AT&T and install it so I automatically unroot?
Much appreciated.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
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im not confirm with it but i read theres a tool called "loki" with it you can unlock your bootloader and run custom firmware. but the rom must provisioned with loki.
search for it and read you in.
hope i could help you a little.