I have a B60 transformer with 3.2.1 HTK75_US_epad-8.6.5.13 on it.
From the reading I have done I should be able to use the 7.1 universal root kit.
My questions are
Where can I get the stock ROM to unroot it and set back to stock if I need to?
Other than updating CWM after using the root kit is there anything else I need to do.
I have rooted my EVO 4g phone and swapped out the rom many times so I'm hoping it is a lot like that but I'm new to this and just do not want to make any mistakes. I have tried to search and read as much as I can but there is tons of info on the forum and lots of it does not match or is very old.
Sorry if this is a newbee questions but I have to learn somewhere.
If you have links please post them and I will read that info.
Thanks
Brandon
ASUS has the stock roms on their website, but the 8.6.5.13 probably isn't available yet as a full rom, just an OTA. There are older versions available, such as 8.6.5.9, but I'm not sure if you can flash to an older version with the built in updater. Once the full rom is released, chances are better you can update back to stock. With nvflash and your B60, you can flash anything you want.
I haven't tried it, but I think that that root tool will let you back up before you flash.
gee one said:
I haven't tried it, but I think that that root tool will let you back up before you flash.
Click to expand...
Click to collapse
Yes, it will ask you if you want to backup before you root but it tells you it could take 4 to 5 hours.
I have rooted and unrooted with this below method many times. I don't need to go looking for a stock rom...it simply reverses the procedure as far as I know...look into it...now if you go for a custom rom your on your own.
http://forum.xda-developers.com/showthread.php?t=1198303
Thank you everyone for your answers, I did the full backup which did not take long as I had done a reset before I started and wiped everything.
The root was painless and is done.
For now I think I will stay with the stock ROM but I'm now going to look for a Kernel to OC it to 1.2-1.4 if I can.
Thanks again
Brandon
Good day and thank you
I can usually find out what i want by reading the forums, but this time I need advice
my tablet is one year old and out of warranty.. and working
TF300T running 4.2.1 JOP40D.WW_epad-10.6.1.27.5-20130902
I understand that i get the unlocker from asus
but I want to unlock the bootloader , install recovery manager and make a backup
and have the ability to change the rom
on my old cell phone ICS , it was root then install CWM for backup's
I don't want to mess anything up assuming things
but from all the reading in the forums and bleeding eyes... it seems there's so many bricked devices... just terrible
did i miss a forum or walkthru on how to NOT brick the tablet
please any help would be great
thank you and take care
ttyl
Cam
aweman said:
Good day and thank you
I can usually find out what i want by reading the forums, but this time I need advice
my tablet is one year old and out of warranty.. and working
TF300T running 4.2.1 JOP40D.WW_epad-10.6.1.27.5-20130902
I understand that i get the unlocker from asus
but I want to unlock the bootloader , install recovery manager and make a backup
and have the ability to change the rom
on my old cell phone ICS , it was root then install CWM for backup's
I don't want to mess anything up assuming things
but from all the reading in the forums and bleeding eyes... it seems there's so many bricked devices... just terrible
did i miss a forum or walkthru on how to NOT brick the tablet
please any help would be great
thank you and take care
ttyl
Cam
Click to expand...
Click to collapse
"...but from all the reading in the forums and bleeding eyes..." for that?! Nah...
1. Unlock: get the apk from asus site (V8) for it. If you run into problems, downgrade to 4.1 and use ver. 7 instead. This is not an unknown issue. Once you're unlocked, it will remain so forever;
2. Recovery: if you stay on 4.2, you can't use CWM. Must install TWRP (2630-4.2 is the latest, I believe). You can use CWM on 4.1, but if you're gonna upgrade anyway, might as well flash TWRP throughout. Choose your recovery carefully: 2.6.3.0 is for 4.1 bootloader (10.4.x.xx); 2.6.3.0-4.2 is for 4.2 bootloader (10.6.x.xx - your current rom). Do it otherwise and you risk bricking your device! That done, you can change roms to your heart's content.
Basically, downgrade to 4.1 if need be, unlock, upgrade to 4.2, flash TWRP, then custom roms. Don't mix roms with incompatible bootloaders though: read the rom threads carefully, Usually, they will warn you at the beginning which bootloader is required for a particular rom. Hint: 4.3 roms definitely need 4.2 bootloader. Have fun.
Note: if you happen to upgrade to 4.2 and like it that way, you can flash Nvflash bootloader (10.6,x) and use CWM 4.2 recovery instead. Credit to Noahvt for pointing that out. A glitch in my case: I could flash, but could not back up. CMW is unreliable, and should be used only as a last resort, as in you don't have a working touchscreen.
Before you ask, yes, I have searched. I also went through each page of the "Here are the similar threads we found:" section before posting. That is actually why I am posting. I see too many different answers.
A little background: I know my way around android in general and have been flashing roms since my G1. I used to be the "rom test dummy" for JesusFreak (yeah, im an oldtimer) so I am not afraid of flashing roms. I am currently running on a windows machine, but I have linux available if that is any easier. I am comfortable in either.
My question: I have a Nexus 5 with 4.4.2 (stock) KOT49H and I want to update finally. Each time I have tried the OTA it gave errors, and I eventually found that is because the rom looks for modifications. Out of the posts I have found here, I have seen some say you have to flash all the way back to stock and then start updating. I have also seen posts that say there are tools that will read your device info and decide what to flash. I have seen some that say you can flash a new (stock) rom over the current rom.
I have no problem backing up the device (I have paid premium) if needed. If I can flash without wipe, GREAT. If not, no big deal. My main thing is that I would like a safe route. This is my main phone so I need it to work. I would also prefer one of the shorter (of the safe) methods. I saw a guide a few minutes ago that seemed to say that you should flash 4x during the process. Once to clean the rom, once to downgrade, and 2 more to upgrade. I am hoping I read that one wrong, but that sounds un-needed. Is there a stock 4.4.4 rom that I can just flash on top of my current 4.4.2 and get it all done in one jump?
Darkrift said:
Before you ask, yes, I have searched. I also went through each page of the "Here are the similar threads we found:" section before posting. That is actually why I am posting. I see too many different answers.
A little background: I know my way around android in general and have been flashing roms since my G1. I used to be the "rom test dummy" for JesusFreak (yeah, im an oldtimer) so I am not afraid of flashing roms. I am currently running on a windows machine, but I have linux available if that is any easier. I am comfortable in either.
My question: I have a Nexus 5 with 4.4.2 (stock) KOT49H and I want to update finally. Each time I have tried the OTA it gave errors, and I eventually found that is because the rom looks for modifications. Out of the posts I have found here, I have seen some say you have to flash all the way back to stock and then start updating. I have also seen posts that say there are tools that will read your device info and decide what to flash. I have seen some that say you can flash a new (stock) rom over the current rom.
I have no problem backing up the device (I have paid premium) if needed. If I can flash without wipe, GREAT. If not, no big deal. My main thing is that I would like a safe route. This is my main phone so I need it to work. I would also prefer one of the shorter (of the safe) methods. I saw a guide a few minutes ago that seemed to say that you should flash 4x during the process. Once to clean the rom, once to downgrade, and 2 more to upgrade. I am hoping I read that one wrong, but that sounds un-needed. Is there a stock 4.4.4 rom that I can just flash on top of my current 4.4.2 and get it all done in one jump?
Click to expand...
Click to collapse
easiest way(if running a custom recovery).. find a rooted stock here in the andtoid development section, and dirty flash(no wiping) it over what you have. you won't lose any data dirty flashing.
if your completely stock, easiest way.. flash the 4.4.4 factory img via fastboot. but you will lose your data.
simms22 said:
easiest way(if running a custom recovery).. find a rooted stock here in the andtoid development section, and dirty flash(no wiping) it over what you have. you won't lose any data dirty flashing.
if your completely stock, easiest way.. flash the 4.4.4 factory img via fastboot. but you will lose your data.
Click to expand...
Click to collapse
Thanks for the info, but can you point to a 4.4.4 rooted stock? I have been searching through the roms and most seem to be customized, not stock. Ive gone through about 7 pages now in http://forum.xda-developers.com/google-nexus-5/development
I havent flashed a rom in a year or 2 since buying Nexus 4/5 devices (hey, they just work) so I am a little out of the loop.
**Edit: I just found this: http://forum.xda-developers.com/goo...-android-4-4-3-ktu84m-rooted-busybox-t2557523 - Maybe I missed it the first time. I think its because the URL says 4-4-3, so I skipped it.
Darkrift said:
Thanks for the info, but can you point to a 4.4.4 rooted stock? I have been searching through the roms and most seem to be customized, not stock. Ive gone through about 7 pages now in http://forum.xda-developers.com/google-nexus-5/development
I havent flashed a rom in a year or 2 since buying Nexus 4/5 devices (hey, they just work) so I am a little out of the loop.
**Edit: I just found this: http://forum.xda-developers.com/goo...-android-4-4-3-ktu84m-rooted-busybox-t2557523 - Maybe I missed it the first time. I think its because the URL says 4-4-3, so I skipped it.
Click to expand...
Click to collapse
thats a good one.. if i go with stock, its going to be a @bigxie rom. and i was around as well for jesus freke
Awesome, thanks. I will flash that when I get home after making a backup.
I struggled with this and finally succeeded by flashing first to 4.4.3, THEN to 4.4.4. Now running like a top.
bltzfsck said:
I struggled with this and finally succeeded by flashing first to 4.4.3, THEN to 4.4.4. Now running like a top.
Click to expand...
Click to collapse
awesome!
Hello
(sorry for my english)
I'm a noob in this world and i need some help.
In the past few days i've been reading a lot of posts in this forum but to a noob it's a little bit hard to understand somethings.
So, i'm using this topic to ask some questions. If there is another thread that answer all my questions and explain things for a newbie, feel free to tell me and apologize to create this new thread.
I have a smartphone android, Galaxy S2 with android 4.1.2, all locked to the provider (I know that there is a specific forum for this smartphone and i read some threads).
Now, i want to make it a ROOT and maybe try new ROM's.
Let's start with the questions:
-To make a root, it's better with kernel exchange or with a simple file?
-In the future, if i want to install another ROM, having the root made from the kernel that is with the phone (using a file in the SD Card) may cause some problems? To do this it's better to go to root insecure kernel?
-Why i need to change kernel? which is the benefits?
-It's possible to restore to the previous kernel?
-What are necessary to backup the ROM that actually i have?
-Changing one time the kernel, i can install all the roms i want or i need to install another kernel's?
Thank you for your atention, and one more time, sorry for my english!
@pedrocrv,
Your English is fine! Don't worry about that, man.
Here is my opinion.
Generally speaking, you don't need to replace your kernel. Replacing the kernel can both drastically change your device's performance for the better, as well as render your device completely unusable, which in Android terminology is called "bricked". If your device is "bricked", it is completely useless as an electronic device, making it nothing more than a brick.
But to get back on topic, it's normally only developers like myself who need to replace the kernel, and even then only every once in a while. It's somewhat unsafe for new users, because one little mistake can lead to a huge problem. Trust me, I've seen them here on XDA myself. Don't become one of them.
However, using and flashing ROMs is a whole different story. ROMs normally change aesthetic parts of your device, like the look and features. If you follow the instructions given to install the specific ROM very well, it is practically impossible to brick your device.
If you find a good ROM, go for it. It's almost definitely going to change your device in a very good way.
So to wrap up this post, basically (for you):
Replace the kernel = bad idea, don't do it until you have more experience
Install/flash a ROM = a great idea, go for it if you find a nice one!
The most important thing to remember, however, is to m a k e a b a c k u p. Once you make a backup, you can mod your system however you want without fear of bricking.
Hope this helps.
@thenookieforlife3
Thank you for your explanation!
I understand what you said, but in one thread of my smartphone i see a lot of people talking about rooting their phones but for this is needed to use another kernel.
I want to root my device, and in a near future maybe install one ROM of CyanogenMod (and try others too), but i'm afraid of rooting because that story of changing the device kernel and using Odin... I don't want a brick
Another question:
If i find a file to root my device without Odin, but i don't have the 100% that it's the file indicated for my device, there is some problem if I try to root with that?
And, as i see, there is some diferent files, how i choose one? it's indifferent or one file have specific itens that another don't have?
Thanks a lot!
pedrocrv said:
@thenookieforlife3
Thank you for your explanation!
I understand what you said, but in one thread of my smartphone i see a lot of people talking about rooting their phones but for this is needed to use another kernel.
I want to root my device, and in a near future maybe install one ROM of CyanogenMod (and try others too), but i'm afraid of rooting because that story of changing the device kernel and using Odin... I don't want a brick
Another question:
If i find a file to root my device without Odin, but i don't have the 100% that it's the file indicated for my device, there is some problem if I try to root with that?
And, as i see, there is some diferent files, how i choose one? it's indifferent or one file have specific itens that another don't have?
Thanks a lot!
Click to expand...
Click to collapse
like Thenookieforlife3 said you do not need a kernel, you dont need one to root or install roms/custom recovery's, they are just for tweaking things or being able to overclock. So, first of all, you are going to have to tell us your model number (or which carrier your phone is on) so we can direct you to the right root guide, s2's are fairly easy to root so dont be scared we will hold your hands the entire way!
Trozzul said:
like Thenookieforlife3 said you do not need a kernel, you dont need one to root or install roms/custom recovery's, they are just for tweaking things or being able to overclock. So, first of all, you are going to have to tell us your model number (or which carrier your phone is on) so we can direct you to the right root guide, s2's are fairly easy to root so dont be scared we will hold your hands the entire way!
Click to expand...
Click to collapse
This. ^
We can definitely give you a hand, but we do need a few details to make sure everything works out.
hello again!
@Trozzul and @thenookieforlife3,
Thank you!
So there is the information asked for: (see the attachment for more details)
Bandbase: I9100BULS1
Kernel: 3.0.31-889555 [email protected] #3 SMP PREEMPT Thu Jan 31 14:48:54 KST 2013
Compilation Number: JZO54K.I9100XWLSD
I have another questions to do:
-What vary from file to file on root?
-What is a AOSP ROM? Where I can find a rom that is almost empty of trash, like i think it is a Stock Rom?
-In the information given above, wich is more important to see if I can install that rom? Can I install a rom that is not XWLSD?
Many thanks!
Answers to your questions are in red.
Thank you! You're very welcome!
So there is the information asked for: (see the attachment for more details)
Bandbase: I9100BULS1
Kernel: 3.0.31-889555 [email protected] #3 SMP PREEMPT Thu Jan 31 14:48:54 KST 2013
Compilation Number: JZO54K.I9100XWLSD
I have another questions to do:
-What vary from file to file on root? Normally not much changes from root method to root method - basically, if anything does, it's negligible to you, meaning that it won't really matter. What does matter is that the root method actually roots your phone.
-What is a AOSP ROM? ASOP stands for Android Open Source Project, and it pretty much means that it's a ROM that is as minimalistic and "free of trash", as you say, as you can get it.
-Where I can find a rom that is almost empty of trash, like i think it is a Stock Rom? Here are a few good ones:
AOSP NeatROM for S2
CarbonRom KitKat for S2
SuperNexus for S2
-In the information given above, which is more important to see if I can install that rom? Can I install a rom that is not XWLSD? The ROMs that you can install will be labelled "S2" and "I9100". Don't try to install any other ROMs unless they have those labels.
Hope these help!
I understand what you said!
For example, the AOSP NeatROM have a version that is not AOSP. What it means?
To Install other ROM's i need to root first?
And now, how i simply root by a file?
@pedrocrv,
Answers to your questions in red.
For example, the AOSP NeatROM have a version that is not AOSP. What it means? That means that there is another version of that ROM that is more full of extra features, a.k.a "trash".
To Install other ROM's i need to root first? Yes.
And now, how i simply root by a file? It depends from method to method - some methods are apps that you install and then hit a "big red button", some methods are files that you have to flash through a custom recovery, for example, ClockworkMod. Basically, just read and follow the instructions that come with each root method.
again, thank you!
So, if i find some thread that talk about a file to root, it's just follow the instructions and it's done?
how I know that i need a custom recovery? mine doesn't work?
what is flashing?
Thank you for your attention!
@pedrocrv,
Once again, answers to your questions in red.
So, if i find some thread that talk about a file to root, it's just follow the instructions and it's done? Yes, that's right.
how I know that i need a custom recovery? mine doesn't work? The rooting method will tell you in the instructions whether or not you need a custom recovery, and if it does, it will tell you which one to use and how to use it.
what is flashing? Simply put, flashing is installing a file (normally a .zip) that has been specially formatted via a recovery method (custom or stock).
Thank you for your attention! No problem!
thenookieforlife3 said:
@pedrocrv,
First, please make sure to hit "Thanks" on each of my helpful posts.
Once again, answers to your questions in red.
So, if i find some thread that talk about a file to root, it's just follow the instructions and it's done? Yes, that's right.
how I know that i need a custom recovery? mine doesn't work? The rooting method will tell you in the instructions whether or not you need a custom recovery, and if it does, it will tell you which one to use and how to use it.
what is flashing? Simply put, flashing is installing a file (normally a .zip) that has been specially formatted via a recovery method (custom or stock).
Thank you for your attention! No problem!
Click to expand...
Click to collapse
im sure we should introduce him to cyanogenmod, cyanogenmod can be more stock than Asop most of the time, Asops nice but there are most of the time little additions that the creator likes, plus if cyanogenmod installer is compatible for your device he shouldn't have todo much!
@pedrocrv , im not trying to steal his thunder but im trying my best to explain it to you too if he left anything out, otherwise if you guys want me to i will back out .
Custom recovery's are basically a way of getting out of a bad spot and being able to Flash new Roms, if you get stuck in a bootloop (stays stuck at the samsung screen for a very long time, the first time you flash a rom you should let it sit for it can take awhile for the first time you turn it on.) you can most likely get out of the problem and be able to backup your stock firmware if you decide you dont like rooting/custom roms, it does stuff the Stock recovery does not do.
Flashing is basically as thenookieforlife3 said its so you can install Roms, when you hear the term flashing think "installing".
@Trozzul and @thenookieforlife3,
Thank you for both atention! i'm learning a lot of things with both of you!
I know cyanogen, and as i search in the wiki of cyanogen page i think my phone is compatible.
What I need to do with the installer? And if i use the installer, how I backup my actual ROM to future problems or needs to come to origins?
stock ROM-> My actual ROM?
Custom ROM-> a new one
So, if i understand everything:
With my actual recovery i'm not able to install other ROM's. But, with my recovery, i'm able to root my device unless the root method needs a custom recovery and it say's how to install it right?
With the root by my recovery, i'm able to install other ROM's but I will need to further install a custom recovery right?
Many thanks :good:
pedrocrv said:
@Trozzul and @thenookieforlife3,
Thank you for both atention! i'm learning a lot of things with both of you!
I know cyanogen, and as i search in the wiki of cyanogen page i think my phone is compatible.
What I need to do with the installer? And if i use the installer, how I backup my actual ROM to future problems or needs to come to origins?
stock ROM-> My actual ROM?
Custom ROM-> a new one
So, if i understand everything:
With my actual recovery i'm not able to install other ROM's. But, with my recovery, i'm able to root my device unless the root method needs a custom recovery and it say's how to install it right?
With the root by my recovery, i'm able to install other ROM's but I will need to further install a custom recovery right?
Many thanks :good:
Click to expand...
Click to collapse
Yes your stock rom is what the device comes with when you buy it. every device method of being able to get custom roms is different, so when you do get a new phone always do your research, sometimes you can root it and dont need a custom recovery (thats only if you want to stay on stock rom) sometimes you need a custom recovery to get root. with my S2 what i needed todo was get a custom recovery first, installing cyanogenmod already comes rooted so you can make a backup of your stock rom without rooting it.
so i dont also exactly know which device you have, where are you from? it looks spanish in your phones setttings with that screenshot, region is important. is it a GT-i9100 or a GT-i9100b? take out the battery and tell us what the model number says there. this is important for the cyanogenmod installer.
Trozzul said:
Yes your stock rom is what the device comes with when you buy it. every device method of being able to get custom roms is different, so when you do get a new phone always do your research, sometimes you can root it and dont need a custom recovery (thats only if you want to stay on stock rom) sometimes you need a custom recovery to get root. with my S2 what i needed todo was get a custom recovery first, installing cyanogenmod already comes rooted so you can make a backup of your stock rom without rooting it.
so i dont also exactly know which device you have, where are you from? it looks spanish in your phones setttings with that screenshot, region is important. is it a GT-i9100 or a GT-i9100b? take out the battery and tell us what the model number says there. this is important for the cyanogenmod installer.
Click to expand...
Click to collapse
No i'm from portugal
so:
Model: GT-I9100
SSN:-I9100GSMH
Wich is the diference?
pedrocrv said:
No i'm from portugal
so:
Model: GT-I9100
SSN:-I9100GSMH
Wich is the diference?
Click to expand...
Click to collapse
There's very little difference between the i9100 and the i9100b, but the difference is enough that there is a separate CyanogenMod installer for both models.
thenookieforlife3 said:
There's very little difference between the i9100 and the i9100b, but the difference is enough that there is a separate CyanogenMod installer for both models.
Click to expand...
Click to collapse
@thenookieforlife3 i think the cyanogenmod installer installs a CWM right for his question on it? also look at these stated on the Cyanogenmod wiki for the GT-i9100
WARNING:
Some second-generation Samsung Exynos devices are potentially susceptible to a "superbrick" caused by performing a factory reset with the stock kernel, which effectively kills the internal memory in the device. It is highly recommended you do not perform this operation while using a stock kernel for safety reasons. To make sure you aren't running the stock kernel (only needed when coming from the stock ROM), fully install CM without performing a factory reset and reboot to recovery before you perform the factory reset.
WARNING:
If you used a non-official method to remove a provider lock, your /efs partition may become corrupt! It is highly recommended you make a backup of this for safe keeping before attempting to modify your device, especially if you plan to remove such a lock.
WARNING:
The newest Gapps package (20140606) is too big for the /system partition of i9100. Please use the 20140105 package instead. This message will disappear when this is resolved.
Click to expand...
Click to collapse
Should we tell him to run a benchmark and tell us his CPU?
@pedrocrv (Edit:https://play.google.com/store/apps/details?id=com.antutu.ABenchMark download this app real fast and tell us what CPU you have) so the cyanogenmod installer will be the easiest thing for you, even though installing a custom rom is insanely easy this is basically a one click method, note that all of your data will be deleted so back that up somewhere where you can save it and put it on your phone when its done installing. so as i asked thenookieforlife3i believe that the cyanogenmod installer will also install the latest and best custom recovery for you (CWM: Clockworkmod will be a huge term like CM: Cyanogenmod you will hear a lot, they are both very popular for being the most stable.) it would be stupid enough for it not to install it as well, but if it does not we will show you an easy app that will install a custom recovery, basically one click just like cyanogenmod. now as i looked on the cyanogenmod site, the installer IS compatible with your phone and will install a Stable version of Cyanogenmod 10.2 which is android 4.3. note that the highest right now is CM 11 which is android 4.4.4 kit kat but right now is what we call a "Nightly".
i will try my best to explain this to you, there are four stages that cyanogenmod puts out i will rate them from lowest to highest: "experiments" "snapshot" "nightly" and "Stable", you only need to worry about nightly and stable, Stable is basically the final product the last update for that android version so its the most stable and with less bugs and this is what you want to aim for, Nightlys are Nightly generated updates that update bugs every night asked by people like us to be fixed, Honestly Nightlys are Very stable and are perfectly fine.
Now you might like Cyanogenmod 10.2, personally a lot of my phones run 10.2 if its available, you might like kit kat (Cyanogenmod 11) better instead, honestly try out 10.2 first and if you dont like it, you can update to Cyanogenmod 11 (they push updates out like how samsung would push out updates.) without deleting your information on CM 10.2, im sorry if i confused you at all please ask a lot of questions if needed!
Trozzul said:
@thenookieforlife3 i think the cyanogenmod installer installs a CWM right for his question on it? also look at these stated on the Cyanogenmod wiki for the GT-i9100
Should we tell him to run a benchmark and tell us his CPU? …
Click to expand...
Click to collapse
Yes, installing CyanogenMod installs ClockworkMod as the default recovery.
Yes, let's have him run a benchmark and tell us the results.
@thenookieforlife3 and @Trozzul
Again, thank you for your patience!
I'm now running the benchmark!
Let's put new question's..
-With CM 10.2, it comes with root, and how to unlock the SIM?
-With CM 10.2, in wich phase of the installation I will be able to backup my stock ROM?
-Imagine that after sometime I want to go back to my stock ROM, What I need to do, because i will have another recovery?
-WIth the CM 10.2 I will have my RAM memory more free?
In the attachment are the images of the test
thank you again!
Pedro
@pedrocrv,
As always, answers to your questions in red.
-With CM 10.2, it comes with root, and how to unlock the SIM? @Trozzul, if you'd please answer this question, that would be great, because I don't know much about SIM unlocking.
-With CM 10.2, in wich phase of the installation I will be able to backup my stock ROM? You will want to make a Nandroid backup before you do anything at all in relation to rooting and CyanogenMod.
-Imagine that after sometime I want to go back to my stock ROM, What I need to do, because i will have another recovery? You will use either the "Install update from SD card" or the "Install .zip from SD card" feature. I don't know exactly, but if that time comes, please let me know and I'll do the research necessary to help you out.
-WIth the CM 10.2 I will have my RAM memory more free? It all depends on what apps you have running at one time. I personally use Advanced Task Killer Free to kill apps directly after I'm finished using them, and that frees up a lot of RAM. CM probably overall will make your RAM memory less free, but if you use the app killing trick, you won't ever have a problem with it.
In the attachment are the images of the test Great, thank you for doing that.