Root How To Install Engineering bootloader

[erisuser1]

thanks for the outline. if im understanding it correctly,ill need to do the 2nd step following jcase's directions from the computer,not simply flashing it in recovery as i did the erisengspl.zip file.

by desktop just crashed so i guess when i get that figured out ill read up on how to do that. i dont want to do too much messing with my phone using the GFs laptop

i just got this phone used,and for cheap. so ill never have to return it to stock to send it back verizon. as long as i can get to Amon_RA's recovery,ill never really need an unlocked bootloader, so i guess it can wait a few days

If you want to avoid installing software on a pc (to run adb), you could perform the flash_image commands from a root shell in a terminal emulator - I infer from your post that there is already a rooted ROM present. But that's kind of tedious and error prone, since you can't cut and paste.

Good luck with the PC rebuild.

 

[scotty85]

thanks. it wont turn on at all with a new power supply,so it may be time for a new one.

im enjoying this rooting and flashing,and modifying my phone,and i would like to to install the software and become savy in the "old school" method. just for the experience of it. and to make it easier to mess with phones that arent as easy to mess with as the eris,lol.

been pokin around some... would another option be to simply flash the in PB00IMG.ZIP hboot and do the battery pull has described in your thread http://androidforums.com/eris-all-things-root/75384-visual-example-pb00img-zip-update-method.html ?

 

[erisuser1]

been pokin around some... would another option be to simply flash the in PB00IMG.ZIP hboot and do the battery pull has described in your thread http://androidforums.com/eris-all-things-root/75384-visual-example-pb00img-zip-update-method.html ?

That might or might not work, depending on the past history of the phone. If you first flash the misc partition with Jcase's ("Flash any RUU") misc.img, then it will certainly work, as that prevents the "Main Version is Older!" problem from occuring - but then you are basically back to my instructions.

You can give it a shot though - it will either fail (harmlessly) with a Main Version error, or it will succeed. I would advise you to make a Nandroid backup first anyway before you begin, though: one time out of the many, many times I used the battery pull trick, the second phase of the PB00IMG.ZIP install happened after I reinserted the battery and re-started. (If that happens, you can put the custom recovery back with fastboot and then restore your saved Nandroid backup.)

eu1

 

[scotty85]

thanks again for the help. i went ahead and gave it a shot. it worked as illustrated,with the exception that the screen was only dark for about half a second

i saw figure 5(in the visual example thread) coming on as i pulled the battery. i assure you i dint slack on it,lol... i had the cover off and my fingers on the battery as i pushed volume up.

i put the battery back in and booted into hboot and when it came up it continued to update. i did see the the 1.49.0000 s-off bootloader had been installed,so not knowing how to flash Amon_RA's recovery in adb or a terminal emulator if i let it completely update, i pulled the battery again in a moment of panic.

at this point i thot i had done a really bad thing,so i put the battery back in and booted it back up normally.it came upand seemed fine so i connected it back to the laptop and simply removed the PB00IMG.ZIP from the sd card.

i know it was reckless,but it seemed to work... powered it off,booted into hboot,and i still have the s-off bootloader,and only send for fastboot and vol up for recovery. went to recovery,picked reboot and when it came back up i sent texts,made some phone calls,took some pics,made sure it was all still working.

so looks like i have the unlocked bootloader and the little guy will be safe from whatever screwups i might have in the future.

im happy to report no eris's were harmed in the making of this post

 

[erisuser1]

i saw figure 5(in the visual example thread) coming on as i pulled the battery. i assure you i dint slack on it,lol... i had the cover off and my fingers on the battery as i pushed volume up.

i put the battery back in and booted into hboot and when it came up it continued to update. i did see the the 1.49.0000 s-off bootloader had been installed,so not knowing how to flash Amon_RA's recovery in adb or a terminal emulator if i let it completely update, i pulled the battery again in a moment of panic.

at this point i thot i had done a really bad thing,so i put the battery back in and booted it back up normally.it came upand seemed fine so i connected it back to the laptop and simply removed the PB00IMG.ZIP from the sd card.

i know it was reckless,but it seemed to work... powered it off,booted into hboot,and i still have the s-off bootloader,and only send for fastboot and vol up for recovery. went to recovery,picked reboot and when it came back up i sent texts,made some phone calls,took some pics,made sure it was all still working.

Rest your mind. The sequence that it goes through first flashes the bootloader, and then the phone reboots rather quickly. This is done so that it is the *new* bootloader that finishes off the installation.

Immediately after the reboot, the (newly installed) bootloader starts verifying the original PB00IMG.ZIP file all over again - and this takes over a minute to perform. There is no writing to flash memory of the .zip file components during this time. That's why the "battery pull" is fairly safe - you have nearly a minute after the phone initially reboots before it is ready to actually begin writing to the phone's flash memory again. (Under normal circumstances - for almost every other device in the world - it is an extremely bad idea to pull power from a device that is having its' firmware flashed; in this peculiar case of the Eris though, you have a full minute or more where it is guaranteed that no writing to flash memory is occurring).

But I did tell you that there was a possibility that would happen, and gave you the prescription for that eventuality - make a Nandroid backup.

(BTW, the "Root" PB00IMG.ZIP ROM can also be "rooted" (as in, install Amon_RA's custom recovery) using One Click or Dummies - so you can let the PB00IMG.ZIP Root ROM installation run to completion, and still not need a PC with the SDK/adb/drivers installed on it.)

Backups are your friend - if you haven't done it yet, make one NOW.

eu1

 

[scotty85]

thanks for the explanations. i did make backups,i was just unsure of how id get Amon_RA's recovery back onto the phone using fastboot so that i could run it. id assumed that allowing the update to complete would have put the phone into a state that my current Amon_RA recovery wouldnt have been there.

 

[erisuser1]

thanks for the explanations. i did make backups,i was just unsure of how id get Amon_RA's recovery back onto the phone using fastboot so that i could run it. id assumed that allowing the update to complete would have put the phone into a state that my current Amon_RA recovery wouldnt have been there.

You are correct that letting the Root PB00IMG.ZIP process run all the way through to completion would have over-written the custom recovery with an HTC (engineering) recovery.

But, as I pointed out twice - you can "root the root ROM" with either OneClick or Dummies, and this installs Amon_RA's recovery back into place without needing a PC/fastboot/adb.

In any event, it sounds like you are all set - enjoy the journey.

eu1

 

[scotty85]

But, as I pointed out twice - you can "root the root ROM" with either OneClick or Dummies, and this installs Amon_RA's recovery back into place without needing a PC/fastboot/adb.

In any event, it sounds like you are all set - enjoy the journey.

eu1

wow it just clicked how easy it would have been to use the dummies method to put amons_ recovery back on... i was makin it way more complicatged in my mind than it actually was

well,i guess i know for the future. like you said,its set now and i am enjoying the journey! thanks again for your help directly,and everything you do for the forum