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Flash Rom

I feel like an idiot for asking, but I'm having issues with the ROM part. I'm used to working on HTC phones and this tablet has been a little different for me. I have unlocked the bootloader and flashed twrp thru fastboot. I'm confused on how to flash the roms. The tablet doesn't show up like my phone does on my computer so where do I place the zip, Second question is can I get to recovery thru fastboot like on my phone. It was as simple as fastboot recovery, but I don't see this in any guide. Any help would be appreciated. And an FYI I do not have an sdcard.

Hi,
to install the rom is like all the other devices but since the last OTA update 4.2.1 there are 3 version of rom for our devices
1 based on ICS bootloader
1 based on JB 4.1.1 bootloader
1 based on JB 4.2.1 bootloader
now all depend on which version of android you have when you unlock the device, you can found easly information about that.
to start the recovey you have just to boot on fastboot mode select RCK with the volume down button and push volume+up to confirm
when in verify if you can have access to sdcard and make backup of the system and restart the system to be sure everything works fine (already to many bricked devices around lol)
if you have the bootloader 4.2.1 (last OTA of march) probably you will have problem to access sdcard, this because only one recovery at the moment work on that bootloader TWRP 2.4.4.0-4.2 (not TWRP 2.4.4.0-JB) in any case never install ICS version if you have JB
be carefoul when you will decide to go haed most of the guide are for old versions.

[Q] 4.0.3 to 4.2 Upgrade Clarification

So I've been running the stock 4.0.3 Android on my TF300T for a very long time. at one point Idownloaded the asus provided unlocking tool, unlocked the device and installed CWM 5.5 and IIRC rooted the device in prep to run a custom ROM. I never got around to doing this but now I am ready to get this thing updated to the latest firmware ASUS provides ( V10.6.1.15.3)
There seems to be a mess of issues with the 4.2 bootloaders and such. So being a complete newbie to the world of Android I want to make sure I do not brick my TF300T or ruin it in any way.
As I understand... I can simply download the firmware. Unzip the .zip file to my SD card, boot into the currently installed CWM, install the new 4.2 update and all I will need to do in install an updated recovery for 4.2 afterwards correct?
EDIT: My plan is to use This guide >> http://forum.xda-developers.com/showthread.php?t=2187982 << I just want clarification that I can update to the TeamWin recovery after installing 4.2

Philldoe said:
So I've been running the stock 4.0.3 Android on my TF300T for a very long time. at one point Idownloaded the asus provided unlocking tool, unlocked the device and installed CWM 5.5 and IIRC rooted the device in prep to run a custom ROM. I never got around to doing this but now I am ready to get this thing updated to the latest firmware ASUS provides ( V10.6.1.15.3)
There seems to be a mess of issues with the 4.2 bootloaders and such. So being a complete newbie to the world of Android I want to make sure I do not brick my TF300T or ruin it in any way.
As I understand... I can simply download the firmware. Unzip the .zip file to my SD card, boot into the currently installed CWM, install the new 4.2 update and all I will need to do in install an updated recovery for 4.2 afterwards correct?
EDIT: My plan is to use This guide >> http://forum.xda-developers.com/showthread.php?t=2187982 << I just want clarification that I can update to the TeamWin recovery after installing 4.2
Click to expand...
Click to collapse
Make sure you look into nvflash before you go updating to later firmwares because once you leave ICS you'll lose the option. Im not sure how many people here have access to nvflash because they brought their tf300t with JB pre-installed and dont have the chance to use nvflash as the exploit used is patched. But i was lucky and and took advantage of it while i was still on ICS, i would have bricked my tf300t 10 times over if it wernt for nvflash.
It makes your tf300t unbrickable, and lets you flash back to 4.0.1 bootloader if you have issues with 4.2:good:
And to answer your question yes you can update the 4.2 version of twrp AFTER the update with fastboot

Bootloop and/or Bricked

Hello,
After a couple of months on cm10.1 on my TF300T 32GB, I wanted to try another rom. I was (and still am) on TWRP v2.2.1.5, and after flashing a new rom (I think it was grimlock) it booted, but would crash after a minute or so of not doing anything. Deciding to flash another rom, I flashed paranoid android and it would never boot anymore. So that is my problem, I am completely stuck, and because I can't boot into android anymore, I can't place any files on my internal SD card to flash.
Is my TF300T beyond repair? Will I have to send it back? I also need some explanation on how Bootloaders/Recoveries/ROMS work on the TF300T, because it's really easy on my Galaxy Nexus but here it's all complicated.
EDIT:
It's also worth mentioning that when starting the tablet while powered off with the onbutton+volumedown it will say that the following bootloader is installed:
"WW_epad-10.4.2.13-20120907" a03

Your tab is not bricked but you are going to need micro sd or mount internal memory via twrp to put roms on your tablet
Sent from my HTC Desire C using xda app-developers app

While as above your tablet isn't bricked, flash the latest version of twrp with fastboot, "fastboot flash recovery *name-of-file*" then move a 4.1 compatible rom over to your tf300 and flash it (id suggest the latest stock firmware from Asus but its up to you)
Its pretty easy on the tf300t, but Asus in their infinite misguided wisdom decided to release a new bootloader with their 4.2 firmware that wasn't compatible with kernels built on prior sources, So now we just have to check if the rom/kernel you are flashing is compatible with the bootloader you're on, 10.4.x.xx is the old bootloader and 10.6.x.xx is the new bootloader, (devs call these bootloaders 4.1 and 4.2 bootloaders because of the versions of android they were released with, the bootloaders themselves are capable of running either 4.1 or 4.2 versions of android.)
Twrp is a recovery and a recovery is a kernel, so if you flash a version of twrp that isn't compatible with your bootloader version, it will not function correctly. Plenty of thread that should point you to the right version.

noahvt said:
Your tab is not bricked but you are going to need micro sd or mount internal memory via twrp to put roms on your tablet
Sent from my HTC Desire C using xda app-developers app
Click to expand...
Click to collapse
JoinTheRealms said:
While as above your tablet isn't bricked, flash the latest version of twrp with fastboot, "fastboot flash recovery *name-of-file*" then move a 4.1 compatible rom over to your tf300 and flash it (id suggest the latest stock firmware from Asus but its up to you)
Its pretty easy on the tf300t, but Asus in their infinite misguided wisdom decided to release a new bootloader with their 4.2 firmware that wasn't compatible with kernels built on prior sources, So now we just have to check if the rom/kernel you are flashing is compatible with the bootloader you're on, 10.4.x.xx is the old bootloader and 10.6.x.xx is the new bootloader, (devs call these bootloaders 4.1 and 4.2 bootloaders because of the versions of android they were released with, the bootloaders themselves are capable of running either 4.1 or 4.2 versions of android.)
Twrp is a recovery and a recovery is a kernel, so if you flash a version of twrp that isn't compatible with your bootloader version, it will not function correctly. Plenty of thread that should point you to the right version.
Click to expand...
Click to collapse
Thank you both. I will try to fix it with the instructions. I am really happy that I don't have to send my tablet for repairs. :fingers-crossed:

I have been on CM 10.1 for sometime but now cannot get anything past the July 6th nightly to boot. Are new CM revisiions only for the 4.2 bootloader?

[Q] Installing new bootloader: brick-risk?!

My device:
- TF300
- Android 4.2.2. / CM10.1 (10.1-20130621-nightly-tf300t)
- WW_epad-10.4.2.9-20120809 (= 4.1 bootloader version)
- TWRP 2.6 recovery (for bootloader v4.1)
My aim is to update to CM10.2, therefore I need a bootloader version 4.2. I downloaded the latest firmware from the asus-website (TF300T-WW_epad-10_6_1_27_5-UpdateLauncher.zip) and put it on /sdcard.
But I'm in doubt:
- Is the asus firmwire described above the best way to upgrade my bootloader? And can I use TWRP to install this zip?
- If so, do I need to change the TWRP version to 2.6 ready for -4.2 (teamw.in/project/twrp2/97) not at all, before or after I installed the new bootloader?
I know bootloader/recovery issues can easily brick a TF300, so to be sure I ask. Thanks in advance!

Found this thread:
Quote:
Originally Posted by Nschneider7 View Post
Nope missed that and was just reading about it. Can I just flash the "TF300T-US_epad-10_6_1_27_1-UpdateLauncher" zip in TWRP? Then from there flash the new TWRP and then install CM? Or do I have to go back and let it upgrade to that point?
I flashed the blob via fastboot. Then flashed recovery via fast boot. Then cm10.2 from recovery. I was on old June build of 10.1 and 4.1 bootloader same as you. Be safe fastboot flash follow guide in q and a section
Sent from inside my mkv.
Same question, but not exactly answered: can you do this without a cable connection with your pc?

X10i/3011 said:
Found this thread:
Quote:
Originally Posted by Nschneider7 View Post
Nope missed that and was just reading about it. Can I just flash the "TF300T-US_epad-10_6_1_27_1-UpdateLauncher" zip in TWRP? Then from there flash the new TWRP and then install CM? Or do I have to go back and let it upgrade to that point?
I flashed the blob via fastboot. Then flashed recovery via fast boot. Then cm10.2 from recovery. I was on old June build of 10.1 and 4.1 bootloader same as you. Be safe fastboot flash follow guide in q and a section
Sent from inside my mkv.
Same question, but not exactly answered: can you do this without a cable connection with your pc?
Click to expand...
Click to collapse
Honestly, I'd rather be safe than sorry when upgrading bootloaders. So I would always suggest using the cable connection because it is less likely to fail. You probably could get away without using it to flash stock, but you wouldn't be able to flash TWRP without fastboot, and then couldn't flash a custom ROM. But everything feels safer once you have Nvflash backups.

X10i/3011 said:
My device:
- TF300
- Android 4.2.2. / CM10.1 (10.1-20130621-nightly-tf300t)
- WW_epad-10.4.2.9-20120809 (= 4.1 bootloader version)
- TWRP 2.6 recovery (for bootloader v4.1)
My aim is to update to CM10.2, therefore I need a bootloader version 4.2. I downloaded the latest firmware from the asus-website (TF300T-WW_epad-10_6_1_27_5-UpdateLauncher.zip) and put it on /sdcard.
But I'm in doubt:
- Is the asus firmwire described above the best way to upgrade my bootloader? And can I use TWRP to install this zip?
- If so, do I need to change the TWRP version to 2.6 ready for -4.2 (teamw.in/project/twrp2/97) not at all, before or after I installed the new bootloader?
I know bootloader/recovery issues can easily brick a TF300, so to be sure I ask. Thanks in advance!
Click to expand...
Click to collapse
I was in the same situation as you not so long ago. Was on 4.1.1 with TWRP 2.6.3.0 JB installed. Asked myself these questions repeatedly. I updated via fastboot to the staging partition using the blob within the latested ASUS firmware zip file. The blob file contains, bootloader, recovery, system and boot. This means your are essentially returning to stock everything upon flashing. This was a huge sigh of relief as I didn't want to brick my device because of the same concerns you have. So I flashed via fastboot to 10.6.2.10 then flashed to TWRP 2.5.0 4.2 as 2.6.3.0 didn't work for me for some reason. I heard a number of people say that 2.6.3.0 4.2 is buggy and suggested to stay with 2.5.0 in which I would recommend from experience. Then flash your custom firmware.

Pretty lost by now. I am still (sick of it) on an unlocked Asus stock 4.2.1 with TWRP 2.5. My intention is to change the ROM but was considering CM 11 which I understand does require TWRP 2.6.X at least. I was hoping for a fix for installing navflash on post JB but I believe does not possible so anything that means touching the bootloader makes me very concern.
I was wondering:
- Can I flash TWRP 2.6 (4.2 img file i beleive) directly from my already installes TWRP 2.5 bootloader and then install CM 11? or do I need fastboot process again?
- Is CM 11 worth on the TF300? I just need some stability and reasonable speed after having so many problems with the stock rom.
Thanks.

luison said:
Pretty lost by now. I am still (sick of it) on an unlocked Asus stock 4.2.1 with TWRP 2.5. My intention is to change the ROM but was considering CM 11 which I understand does require TWRP 2.6.X at least. I was hoping for a fix for installing navflash on post JB but I believe does not possible so anything that means touching the bootloader makes me very concern.
I was wondering:
- Can I flash TWRP 2.6 (4.2 img file i beleive) directly from my already installes TWRP 2.5 bootloader and then install CM 11? or do I need fastboot process again?
- Is CM 11 worth on the TF300? I just need some stability and reasonable speed after having so many problems with the stock rom.
Thanks.
Click to expand...
Click to collapse
Yes, CM11 requires TWRP 2.6.3.1.
You can install NvFlash on a JellyBean Bootloader, link and guide is in my signature.
If you bootloader is above 10.6.1.8, you can just flash the TWRP 2.6.3.1 and then reboot and then flash CM11 + gapps.
I think it is super smooth with the OC Kernel.

Any warnings/heads up to offer me? Leaping over many versions...

My TF300T still has the old stock firmware from October 2012 (4.1).
It is unlocked and has TWRP from february 2013.
Now I will be jumping to a current custom firmware (Crombi-kk 4.4).
If I understand correctly, I have to flash the latest STOCK firmware (V10.6.1.27.5 android 4.2) and install the new CWM/TWRP before I can flash a custom firmware.
My main worry is flashing the newest stock rom on my already TWRP/rooted/unlocked TF300T. Will that cause a problem or will the stock firmware wipe everything clean (except for the unlock)?
Also, the unlock utility on Asus's website is made for 4.2 only. When I unlocked my TF300T, it was 4.1. What will happen when I flash the stock 4.2? Will my 4.1 unlock cause problems or will it be wiped, or will it still be effective?

alkizmo said:
My TF300T still has the old stock firmware from October 2012 (4.1).
It is unlocked and has TWRP from february 2013.
Now I will be jumping to a current custom firmware (Crombi-kk 4.4).
If I understand correctly, I have to flash the latest STOCK firmware (V10.6.1.27.5 android 4.2) and install the new CWM/TWRP before I can flash a custom firmware.
My main worry is flashing the newest stock rom on my already TWRP/rooted/unlocked TF300T. Will that cause a problem or will the stock firmware wipe everything clean (except for the unlock)?
Also, the unlock utility on Asus's website is made for 4.2 only. When I unlocked my TF300T, it was 4.1. What will happen when I flash the stock 4.2? Will my 4.1 unlock cause problems or will it be wiped, or will it still be effective?
Click to expand...
Click to collapse
If you would like help with this shoot me an email here [email protected]
We can get you where you need to be and than we can post what we did back here so everyone can see what we did...
Thx Josh

Thanks for your offer. I actually got the green light on the CM 4.4.x Q&A thread.
I read that flashing the CWM for 4.1 would brick your tablet if you had 4.2 installed, so I was worried that flashing 4.2 on top of an existing 4.1 CWM would brick it as well. It turns out it simply removes the CWM entirely. Good times.
Basically what I ended up doing was:
1 - Transfer the latest official TF300T firmware (zip file) onto an SD card.
2 - Start my TF300T with my old (4.1) CWM recovery and select to flash my android with the zip file on the SD card.
3 - The TF300T bootloader stayed unlocked, but the old CWM was gone.
4 - Using ADB: Upload & flash the new CWM Philz Touch
5 - Install/flash the desired custom rom (from within CWM using SD card)
6 - Restore to factory default (from within CWM)
Now I even installed Grimlock's kernel to allow overclocking.
My TF300T has a new life. It is now very much acceptable in terms of speed.