Hi Guys,
I have s3 GT-I9305, android version 4.1.2, baseband version I9305XXBLL5. Australian model for Optus.
I successfully rooted and installed Philz_Touch_6.19.3 _ After that I could do Nandroid online backup and confirm it is rooted.
When I tried to flash custom ROM today - I found I can't boot in CWM/Philz recovery mode. Then I tried to different version of Philz/CWM and TWRP but none worked. It keeps booting in stock recovery mode- I get message as shown in attached image.
PS: I have USB diagnosis checked but haven't unlocked boot loader?
to be specific: my phone works fine - boots fine - It is just I want to load custom rom and it won't go to custom recovery and I can't load custom ROM.
Thanks.
HELP!
can anyone please help me out here!
I kept searching and found some solution but none worked.
I used triangle away. - didn't work
Installed custom recovery without checking auto reset and started after pulling battery out. - didn't work
It still boot in odin mode and I can't go to custom recovery
i have the same problem too when i got my phone flashed 3rd recovery last year,
the stock recovery can automaticly restore itself after reboot~
but i found the solution here in xda,just flash a zip to unlock the self-protection of the stock recovery~
i will tell you the link and the attachment several hours later after my work,if you cannt wait, you can search it here,maybe you can find it yourself.
Sent from my GT-I9305
Aphirodite said:
i have the same problem too when i got my phone flashed 3rd recovery last year,
the stock recovery can automaticly restore itself after reboot~
but i found the solution here in xda,just flash a zip to unlock the self-protection of the stock recovery~
i will tell you the link and the attachment several hours later after my work,if you cannt wait, you can search it here,maybe you can find it yourself.
Sent from my GT-I9305
Click to expand...
Click to collapse
I had a quick search but couldn't find it. Will greatly appreciate if you can post link.
Thanks
even after you flash a custom recovery...your phone will automatically flash stock recovery every time it reboots...so that's why you will get into stock even if you flash CWM/TWRP or what you like.....
here is the solution: http://forum.xda-developers.com/gal...-cf-root-cwm-recovery-ported-supersu-t1914394
read at the end of the first post....WORKAROUND......
i used myself and worked....
ggmm2013123 said:
I had a quick search but couldn't find it. Will greatly appreciate if you can post link.
Thanks
Click to expand...
Click to collapse
the guy offered the post which included the solution.
try to flash the "Remove-boot-recovery.p.zip",it will work..
good luck
:fingers-crossed:
Done
Thanks guys.
Above solution didn't work for me but I got it working through rom manager App. I reboot to recovery through ROM Manager and it worked.
How ever After I installed Pacman rom, I couldn't use App as there were no Gapps and wouldn't boot to recovery. The workaround here was to press home, volume up and lock button simultaneously and release it after few second and it will go to custom recovery.
In the end, I am on Pacman Nightly 06/04/2014 with Philz touch recovery.
Related
Hi,
I've searched around and found another topic in wich the user had the same problem, but I couldn't figure out what he did.
http://forum.xda-developers.com/showthread.php?t=1634870
I flashed my phone with the JB official update and it is working fine. But after that I was trying do enable root on my phone, wich requires some recovery mode installed on the phone.
But when I try to access the stock recovery mode, I only get a Samsung Galaxy S Advance logo screen and that's it, it gets stuck.
I can access the Download mode though (The user in the other post I mentioned couldn't).
After trying to access the stock recovery mode I tried to flash the TWRP recovery mode as explained in this topic (http://forum.xda-developers.com/showthread.php?t=1873119), but all I get is the Samsung Galaxy S Advance logo screen again.
Is there a way to flash the stock recovery mode?or a way to flash the Clockwork recovery? I searched a lot and couldn't find any ways of doing thaht.
Thank you.
there is a temporary CWM,check in development section,it needs recovery.
or
have you tried waiting in recovery lets say 1-2 min?
mj111996 said:
there is a temporary CWM,check in development section,it needs recovery.
or
have you tried waiting in recovery lets say 1-2 min?
Click to expand...
Click to collapse
Hi, thanks for answering!
This one? http://forum.xda-developers.com/showthread.php?t=1987313
I've seen it before, but I need to use the stock recovery mode to install it, wich I can't access.
and yes, I gave it up to 5 min to initialize the stock recovery mode and nothing =/
did you try factory reset?
at settings-backup and reset?
or
flash firmware again and try.
mj111996 said:
did you try factory reset?
at settings-backup and reset?
or
flash firmware again and try.
Click to expand...
Click to collapse
Did these things you said and it worked!! Thanks, man!
hey guys !
i have rooting/custom rom experience with htc desire and sgs 3
so a buddy asked me if i could install a custom rom on his phone.
I told hem i would do it but he told me he did try to root and install a custom rom on the phone but i did not work that well.
i found out the phone is rooted and CWM version 3.0.0.5
i found out for the most if not all custom roms you need CWM version 5 or 6
so i thought lets update the CWM!
Well i did all sort of things but it wont let me update/flash it in the recovery..
So im stuck at this part ! any advice ?
also i found out if start up the download mode its stuck at downloading and wont go any further.
DL mode supposed to "stuck" at downloading as it waits for you to connect to odin.
why not flash recovery via rom manager from google play ?
eytan123 said:
DL mode supposed to "stuck" at downloading as it waits for you to connect to odin.
why not flash recovery via rom manager from google play ?
Click to expand...
Click to collapse
ok i did not know that
Well i have tried that with rom manager but its doing only a temporally flash after reboot its gone.
and it only found one CWM version and it whas not a 5 or 6
See if this page can be of some help to you:
http://forum.xda-developers.com/showthread.php?t=2057161
Here is what I did with the phone:
- Flashed JVU via odin
- Flashed CF-Root with CWM via odin
- Wipe EVERYTHING
- Flashed semaphore kernel for 4.3 via CWM
- Rebooted to CWM
- Flashed CM 10.2 stable via CWM
- Flashed semaphore again
- Flashed gapps
And now the phone keeps rebooting to CWM everytime I power it on. It never goes to Android, it always boots to CWM. Any ideas?
Of course, i tried to flash CM / semaphore / gapps again but it keeps doing the same. Flashing only CM does not work either
same problem with my i9000 back year..U have lost you internal memory..it can work if u take you phone into download mode for 5 minutes and then start it it will work..
Sent from my GT-I9300 using xda app-developers app
[email protected] said:
same problem with my i9000 back year..U have lost you internal memory..it can work if u take you phone into download mode for 5 minutes and then start it it will work..
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
What do you mean exactly? ;_;
By the way it seems to work after flashing a samsung stock ROM but it does the same everytime I try to install CM. And I have done it before, I don't understand this ;_; (I decided to start over again because I was having trouble to downgrade from 4.4)
Have you find a solution? I faced the same problem and after reading half of the day on this forum I managed to find a solution to go back to stock and restore the phone functionality. Now I only have to flash CWM/TWRP and start to flash custom ROMs again
Let me know if you still need help.
The correct procedure to come to any ROM is from GB>ICS>JB>KK. So make sure that you are following the correct procedure
Sent from my GT-I9000 using Tapatalk 2
roccatgaming said:
Have you find a solution? I faced the same problem and after reading half of the day on this forum I managed to find a solution to go back to stock and restore the phone functionality. Now I only have to flash CWM/TWRP and start to flash custom ROMs again
Let me know if you still need help.
Click to expand...
Click to collapse
Hi,
I have the same problem, device keeps rebooting.
I did a rooting through Odin 3 and I got the green box saying PASS and now the device keeps rebooting. how can i fix it. Looks like you did the fix on your device.
Can you please tell me step by step how to fix my device.
Your help would be appreciated
Thanks
FLDS
As the title suggests, I rooted my phone, unlocked BL and was about to flash CM for Honami, which is Z1, but the flashing of the ROM was stopped because it recognizes my device, a Z1, as a "togari", a Z Ultra. I find this quite odd as I have practically no idea why it does that.
I also tried flashing "togari" CM ROM, but that also fails.
Any fixes for this?
Sari95 said:
As the title suggests, I rooted my phone, unlocked BL and was about to flash CM for Honami, which is Z1, but the flashing of the ROM was stopped because it recognizes my device, a Z1, as a "togari", a Z Ultra. I find this quite odd as I have practically no idea why it does that.
I also tried flashing "togari" CM ROM, but that also fails.
Any fixes for this?
Click to expand...
Click to collapse
if you are sure that you have an z1... then just remove the device check in the updater script (within the zip...) it is in the beginning... cant really remember how it looks but ... search google perhaps.. then it will flash weird enough ... my s also identifies as an sl... but that is from the build prop
HellRoot said:
if you are sure that you have an z1... then just remove the device check in the updater script (within the zip...) it is in the beginning... cant really remember how it looks but ... search google perhaps.. then it will flash weird enough ... my s also identifies as an sl... but that is from the build prop
Click to expand...
Click to collapse
Haha, yes. I google for it and tried to simply delete the device check in update-script, but it didn't work for me. I believe the issue is in my recovery, which is not a 4.4 kitkat recovery. The CWM-recovery I have at the moment is 6.0.3.6 and I believe that is the reason for my issues. I have had no luck trying to find a 4.4 kitkat recovery... any tips here?
Sari95 said:
Haha, yes. I google for it and tried to simply delete the device check in update-script, but it didn't work for me. I believe the issue is in my recovery, which is not a 4.4 kitkat recovery. The CWM-recovery I have at the moment is 6.0.3.6 and I believe that is the reason for my issues. I have had no luck trying to find a 4.4 kitkat recovery... any tips here?
Click to expand...
Click to collapse
well..i have never had problems with it being the recovery... what error does it make now?
HellRoot said:
well..i have never had problems with it being the recovery... what error does it make now?
Click to expand...
Click to collapse
I tried this recovery too, without any luck: http://forum.xda-developers.com/showthread.php?p=49966299
To begin with I got Status 7 error, which is now gone.. I found a tutorial to flash SlimRom for Z1, which is android 4.4.2: http://www.ibtimes.co.uk/android-4-4-2-kitkat-sony-xperia-z1-available-via-slimkat-rom-1432702
However, I was only able to make emergency calls, no cellular at all. I flashed CM through the same method and everything I tried worked, except cellular. Thus, I had to wipe it and install stock Sony firmware.
After that I tried flashing CM the "normal" way through recovery and everything installed as usual, but when I push reboot to reboot the system, the phone simply shuts off. Even if I press the powerbutton to turn it on, it only vibrates and nothing else happens. Again, I flashed stock firmware to be able to use the phone again...
I am very confused about this, because it does not give any errors. It simply does not work :l
[/COLOR]
Sari95 said:
I tried this recovery too, without any luck: http://forum.xda-developers.com/showthread.php?p=49966299
To begin with I got Status 7 error, which is now gone.. I found a tutorial to flash SlimRom for Z1, which is android 4.4.2: http://www.ibtimes.co.uk/android-4-4-2-kitkat-sony-xperia-z1-available-via-slimkat-rom-1432702
However, I was only able to make emergency calls, no cellular at all. I flashed CM through the same method and everything I tried worked, except cellular. Thus, I had to wipe it and install stock Sony firmware.
After that I tried flashing CM the "normal" way through recovery and everything installed as usual, but when I push reboot to reboot the system, the phone simply shuts off. Even if I press the powerbutton to turn it on, it only vibrates and nothing else happens. Again, I flashed stock firmware to be able to use the phone again...
I am very confused about this, because it does not give any errors. It simply does not work :l
Click to expand...
Click to collapse
just copied from the CM11 dev fora...
Install instructions:
first time
- power off the phone:
- hold vol+ and plug usb to boot into fastboot (blu led)
- fastboot flash boot boot.img (from cm10 zip)
- fastboot reboot
- enter recovery, on boot led will be violet for 3'', during this period press vol+
- flash rom zip
- flash gapps zip
- wipe
- reboot
for update just flash rom zip from recovery
Google Apps are not included in this ROM. You'll need to find those yourself if you want them.
HellRoot said:
[/COLOR]
just copied from the CM11 dev fora...
Install instructions:
first time
- power off the phone:
- hold vol+ and plug usb to boot into fastboot (blu led)
- fastboot flash boot boot.img (from cm10 zip)
- fastboot reboot
- enter recovery, on boot led will be violet for 3'', during this period press vol+
- flash rom zip
- flash gapps zip
- wipe
- reboot
for update just flash rom zip from recovery
Google Apps are not included in this ROM. You'll need to find those yourself if you want them.
Click to expand...
Click to collapse
Hmm... seems reasonable. Could you give me the link to the fora, so I can try this method out too ?
Sari95 said:
Hmm... seems reasonable. Could you give me the link to the fora, so I can try this method out too ?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2540650
there it is.... hope you figure it out.
Sari95 said:
As the title suggests, I rooted my phone, unlocked BL and was about to flash CM for Honami, which is Z1, but the flashing of the ROM was stopped because it recognizes my device, a Z1, as a "togari", a Z Ultra. I find this quite odd as I have practically no idea why it does that.
I also tried flashing "togari" CM ROM, but that also fails.
Any fixes for this?
Click to expand...
Click to collapse
I had this problem when I try to flash with LB.
HellRoot said:
http://forum.xda-developers.com/showthread.php?t=2540650
there it is.... hope you figure it out.
Click to expand...
Click to collapse
Thank you I kind of figured it out... but I am not sure why/ how xD I wiped everything, flashed stock firmware "a.136", rooted, installed recovery and flashed CM. After that, it worked as it is supposed to, so problem solved
Thanks for your help
Sari95 said:
Thank you I kind of figured it out... but I am not sure why/ how xD I wiped everything, flashed stock firmware "a.136", rooted, installed recovery and flashed CM. After that, it worked as it is supposed to, so problem solved
Thanks for your help
Click to expand...
Click to collapse
good to hear hope you enjoy the CM.... if you want then please tell me how it is running.. performance, battery, camera etc
have a good day
I am only just new and have been playing around with this custom rom stuff for a short while now, I have ClockworkMod Recovery v6.0.4.7 on my I9305T. I have tried a few different Roms so far but they don't work. I tried just today "RevolutionaryS5-V3" it obviously went through the installation process but did not boot into it, just came up with the samsung default ( samsung S III GT- I9305T ) logo in white. It disappeared then came back looping that way.
So now I have went into the "Advanced Menu" and then "show log" I don't know if this will help you but, it displayed this:-
ClockworkMod Recovery v6.0.4.7
persist.sys.root_access=1
persist.radio.adb_log_on=1
persist.radio.add_power_save=1
persist.radio.apm_sim_not_pwdn=1
service.adb.root=1
keyguard.no_require_sim=true
telephony.lteOnGsmDevice
mobiledata.interfaces=pdp0,wlan0,gprs,ppp0
I:Checking for extendedcommand...
I:Skipping execution of extendedcommand, file no
t found...
I:Can't partition non mmcblk device: /devices/pl
atform/s3c-sdhci.2/mmc_host/mmc1
The roms I have downloaded are:- aicp_i9305_lp-10.0-RELEASE-20150708 (this one looped its boot logo), cm-11-20150907-NIGHTLY-i9305 (i have the recovery .img for this), cm-12.1-20150926-NIGHTLY-dogo (i have the recovery .img for this), FlashingDroid_S5_v2.2 and RevolutionaryS5-V3, if these roms are any good for my I9305T, Can anyone give me some advise on what or how to install these roms.
Regards,
Wayne
Something went wrong while flashing rom or maybe the rom data is corrupt.
Bootloop means your device fails to boot if system data is corrupt by flashing rom
You had soft brick.
Reboot into recovery and restore the stock rom if you had nandroid backup.
Sent from my MT27i using XDA mobile app
RevolutionaryS5-V3? that one is not for the i9305 unless i have missed a thread for it. The roms for your phone can be found here http://forum.xda-developers.com/galaxy-s3/development-i9305
but as stated flash stock rom again, flash custom recovery and then choose the rom for your phone
Hey Piyush,
Initially I did try do a Backup using Titanium Backup app, first try I think there wasn't enough room on the internal HDD, so I tried on the external HDD which I thought had done so.. So when I came to this problem, the backup did not work.
Now at first before I rooted the phone. It was done by odin v1.85 and of course it did root. So I know it has superSU, but I can't get onto a stock rom for this phone because of my **** sat internet bandwidth and also a good site to download from. I tried the samsung-update site, but the 2 links don't allow me to finish the download. Do you know of any links that i can download the stock rom for my i9305T my phone was running android v4.3. The link I just stated was for v4.3.
Can you give me some advise on how or what I should do?
Regards,
Wayne
wane72 said:
I am only just new and have been playing around with this custom rom stuff for a short while now, I have ClockworkMod Recovery v6.0.4.7 on my I9305T. I have tried a few different Roms so far but they don't work. I tried just today "RevolutionaryS5-V3" it obviously went through the installation process but did not boot into it, just came up with the samsung default ( samsung S III GT- I9305T ) logo in white. It disappeared then came back looping that way.
So now I have went into the "Advanced Menu" and then "show log" I don't know if this will help you but, it displayed this:-
ClockworkMod Recovery v6.0.4.7
persist.sys.root_access=1
persist.radio.adb_log_on=1
persist.radio.add_power_save=1
persist.radio.apm_sim_not_pwdn=1
service.adb.root=1
keyguard.no_require_sim=true
telephony.lteOnGsmDevice
mobiledata.interfaces=pdp0,wlan0,gprs,ppp0
I:Checking for extendedcommand...
I:Skipping execution of extendedcommand, file no
t found...
I:Can't partition non mmcblk device: /devices/pl
atform/s3c-sdhci.2/mmc_host/mmc1
The roms I have downloaded are:- aicp_i9305_lp-10.0-RELEASE-20150708 (this one looped its boot logo), cm-11-20150907-NIGHTLY-i9305 (i have the recovery .img for this), cm-12.1-20150926-NIGHTLY-dogo (i have the recovery .img for this), FlashingDroid_S5_v2.2 and RevolutionaryS5-V3, if these roms are any good for my I9305T, Can anyone give me some advise on what or how to install these roms.
Regards,
Wayne
Click to expand...
Click to collapse
The phone was v4.3 before i rooted the phone. Do i need to flash the stock v4.3 rom again or can i use the older v4.2 or newer v4.4 to reflash the recovery?
regards,
wayne
maultasche said:
RevolutionaryS5-V3? that one is not for the i9305 unless i have missed a thread for it. The roms for your phone can be found here http://forum.xda-developers.com/galaxy-s3/development-i9305
but as stated flash stock rom again, flash custom recovery and then choose the rom for your phone
Click to expand...
Click to collapse
I'm not sure if you can downgrade from 4.3 to 4.2 or earlier. If the phone was running 4.3 then I'd install 4.3 or 4.4 to get stock recovery back. Then you can install a custom recovery. No need to root your phone for that.
Do you know a link that will take me to a compatible file for my GT-i9305T, I'm just not sure what to look out for. Also would you be able to give me a quick rundown/instructions on how to do this. Will I need odin, and which version will I need. Currently I have v1.85, that's what I used to start off. I really don't wanna brick this phone.
Regards,
Wayne
maultasche said:
I'm not sure if you can downgrade from 4.3 to 4.2 or earlier. If the phone was running 4.3 then I'd install 4.3 or 4.4 to get stock recovery back. Then you can install a custom recovery. No need to root your phone for that.
Click to expand...
Click to collapse
http://forum.xda-developers.com/gal...ck-rom-4-4-4-gt-i9305n-i9305nxxufni4-t2886807
there you'll find the Kitkat DBT for i9305. Will work with your phone as well. In the OP you'll find instruction on how to install this version via odin. Odin is included in the zip.
After that you put your phone into download mode again and flash the preferred recovery via odin. But don't use TWRP 2.8.7.0 from their site. That build is broken and is getting fixed atm. Either use TWRP 2.8.5.0 or latest Philz Touch. If you decide to flash a custom ROM again, make sure you're in the right forum, e.g. i9305
Thanks heaps for your help so far maultasche, I will let you know how I go with this.
Cheers,
Wayne
maultasche said:
http://forum.xda-developers.com/gal...ck-rom-4-4-4-gt-i9305n-i9305nxxufni4-t2886807
there you'll find the Kitkat DBT for i9305. Will work with your phone as well. In the OP you'll find instruction on how to install this version via odin. Odin is included in the zip.
After that you put your phone into download mode again and flash the preferred recovery via odin. But don't use TWRP 2.8.7.0 from their site. That build is broken and is getting fixed atm. Either use TWRP 2.8.5.0 or latest Philz Touch. If you decide to flash a custom ROM again, make sure you're in the right forum, e.g. i9305
Click to expand...
Click to collapse
From backup I actually meant if you had cwm and you did a nandroid backup of the stock rom from the recovery itself.
If you are getting bootloop you can easily fix it by restoring the backup.
Search on the net about recovery from soft brick and bootloops.
Nandroid backups can atleast get your device in running condition.
If you have custom recovery backup your rom first then you can flash any desired rom.
One more thing if you had flashed custom rom do not factory reset your device,this may result in soft brick.
Hope that helps!
Is your device booting now??
Sent from my MT27i using XDA mobile app
Hi Maultasche, how do I send pics from my PC of what's happening on my phone?
Regards,
wayne
wane72 said:
Thanks heaps for your help so far maultasche, I will let you know how I go with this.
Cheers,
Wayne
Click to expand...
Click to collapse
Yes, I successfully got the phone to boot up and run. I used the I9305XXUFNI3_I9305DBTFNI3_I9305XXUFNI3_HOME.tar file using the odin v3.09 and now it has asked the country and so on..
It was a bit daunting thinking if it was going to brick or fix the phone...
Thanks for your help, time and kindness for the files you gave me.
The next couple of days I will try attempt install Cyanogenmod 11. Will I need to use odin to install the recovery image, just like I did for the I9305XXUFNI3_HOME.tar file?
regards
Wayne
wane72 said:
Thanks heaps for your help so far maultasche, I will let you know how I go with this.
Cheers,
Wayne
Click to expand...
Click to collapse
You're welcome, glad it did help.
Yes, you need odin to flash the recovery again. No need to root your phone just to install the recovery, as mentioned. Then you can flash whatever ROM you'd like. One thing - although CM 11 still gets nightlies from time to time there is no maintainer left. He switched devices. If you encounter any issues which might be device related they probably won't get fixed.
Is sending pics on pc still an issue? Sorry, I wasn't online and I forgot to check the thread :/
HI Maultasche, so I have been looking at the" Resurrection-Remix-LP-v5.5.6" rom and have been downloading the files for it, but i am not sure what the "changelog" file is for or what it does. The page - forum . xda-developers.com / galaxy-s3 / development-i9305 / rom-resurrection-remix-4-4-2-kitkat-v5-t2704828 . It tells me I need these Installation Files:- ROM , Gapps & Changelog. Do you know if i can install this Rom using
CWM v6.0.4.7?
Oh, and about the send pic question, I wanted to send you a pic of the odin mode screen from my phone, but the only thing I could see was the "insert image" button. But it wanted me to enter a URL for the picture. Whats the go there?
Regards,
Wayne
maultasche said:
You're welcome, glad it did help.
Yes, you need odin to flash the recovery again. No need to root your phone just to install the recovery, as mentioned. Then you can flash whatever ROM you'd like. One thing - although CM 11 still gets nightlies from time to time there is no maintainer left. He switched devices. If you encounter any issues which might be device related they probably won't get fixed.
Is sending pics on pc still an issue? Sorry, I wasn't online and I forgot to check the thread :/
Click to expand...
Click to collapse
The change log file only shows what has been fixed and what has changed to previous builds. Nothing you need for the ROM
You only need the ROM, gapps and the recovery. Use the recovery rodman has mentioned in his post.
Insert image button? Via Tapatalk? Don't know what you mean to be honest.
Me Again, just above this message box there is the insert image icon. Doh... So now I have spotted the Paperclip icon above and now feel a **** for asking how to send a picture.. Sorry.
So again I thank you for your help, it is much appreciated.
Regards,
Wayne
maultasche said:
The change log file only shows what has been fixed and what has changed to previous builds. Nothing you need for the ROM
You only need the ROM, gapps and the recovery. Use the recovery rodman has mentioned in his post.
Insert image button? Via Tapatalk? Don't know what you mean to be honest.
Click to expand...
Click to collapse
Why won't my phone show up on Odin?
For what? Install lastest Samsung drivers and make sure Kies is not running
Need to install a ROM without a PC
Hi maultasche, Can you help me with this, I have my wife's phone which is a S3 i9305 as well. The USB connection on the phone has been damaged and so the cable can't be connected. I was wondering if I could still install the ROM without the use of a PC. Can you tell me the best software I could do this with? Also I am not sure the best way to back up the phone, not wanting to root it.
Regards,
Wayne
hi,
what ROM youre talking about? Official firmware? If you have a flashable zip yo could do that with flashfire, flashify, rashr etc. Or via custom recovery. For a custom recovery is no root needed.
As for backups depending on what you want to backup (whole system including data etc. or just apps with apps data). Without root your backup options are kind of limited. You can backup apps and app data via helium but not every app can be backed up using this tool. You could do a back up via adb but not sure how complete such a backup will be. I never did that. Or a backup with a custom recovery again. Might be the easiest way.