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Rooting issues - ADB unable to locate phone in fastboot

Hi everyone,
I have looked everywhere on google and have been at this for over 5 hours now. I have tried rooting my phone from 3 different PCs (XP SP3, SP2 and 7). With all of them i have managed to get the drivers for adb installed (after many problems) and got all the way to the fastboot part of the rooting.
Once i get there, i have the same problem on all 3 PCs. ADB can no longer find my phone! Following the instructions, i checked for the device before i powered it off and found it by doing abd devices in cmd prompt. The moment the device is powered off and then back on, bam! No more device!
I am at my wits end at this point and just don't know what else I could possibly do! I would be immensely grateful for ANY advice.
I did check that my device allowed USB debug so that's not it either.
Also, my phone is a Rogers phone and I have just put through the upgrade they sent this morning.

adb cant find your phone in fastboot mode but fastboot can
Try writing fastboot devices instead of adb devices
All the comands in fastboot mode start with fastboot...e.g fastboot flash xxx xxx.img

I ran into this problem as well on my attempt, I forgot to re-enable (or enable) depending on where I was at "usb debugging" which is in:
settings> applications > development > check the usb debugging box.
After that, when you do abd devices in your shell, it should surely list after that. Good luck!
edit-- woops scratch that.. sorry I just read back that you made sure of that.

Thank you for that!
Now, i see it in fastboot, but when i try typing fastboot boot recovery.img i get a "cannot load recovery.img"
Sorry, apparently i need a lot more hand holding than i though!
(this is where I am getting the instructions from HowardForums. I'd post the link but I can't do that yet on this forum...
Basically, these are the instructions i am following:
If the phone you have is an HTC Magic (no hardware keyboard), the method is pretty much the same. I modified Haykuro's zip with files that were meant for the Magic. You can grab it here:
*link*
Again, open another command prompt as steps 2, and 6-8 are entered in the command prompt.
Quote:
Originally Posted by Haykuro-ish
0. Place update.zip on SD card.
1. power off the phone and boot into fastboot (hold back and power)
2. fastboot boot recovery.img
3 [optional]. make a backup with nandroid
3. apply update. (LET IT FINISH, DO NOT TOUCH ANYTHING UNTIL YOUR PHONE IS COMPLETELY IDLE. DO NOT TOUCH AFTER FIRST REBOOT (WHEN CHIP APPEARS) UNLESS YOU LIKE A BRICK. )
4. reboot out of recovery mode.
5. power off phone, hold back button and power to boot into fastboot again
6. fastboot flash boot boot.img
7. fastboot flash recovery recovery.img
8. fastboot reboot
enjoy!
These are pretty much the Haykuro instructions for the Dream, which I modified to apply to the Magic. The boot and recovery images were made by Amon_RA. Happy Rooting!
Just like with the Dream, the first part flashes a good SPL, the second flashes a rooted boot and recovery. The easiest way to test if the device is rooted is to open another command prompt in the tools dir and type
Code:
adb root
If it returns that adb is already running in root, then you're all set.
Click to expand...
Click to collapse
Am i doing something wrong?
Thanks so much!

You need to navigate to the folder where you saved your recovery.img
For example if you put it on d:/Android dev. you will need to do (inside cmd)
d: (switches to drive d
cd d:/Android dev. (changes the folder to android dev.)
and then issue the fastboot command
without the brackets of course...

eyegor said:
You need to navigate to the folder where you saved your recovery.img
For example if you put it on d:/Android dev. you will need to do (inside cmd)
d: (switches to drive d
cd d:/Android dev. (changes the folder to android dev.)
and then issue the fastboot command
without the brackets of course...
Click to expand...
Click to collapse
Again, thank you so much! It seems I am still having issues as now I'm being told that "remote not allow".... is this a rogers thing?
Again i do apologize for all the hand-holding necessary here

yes, i am getting this <remote:not allow> message too. I was able to fix my other magic (purchased in october) via fastboot boot recovery.img but not this new one i have (purchased in Dec).
Anyone have any ideas how to bypass this block of 'remote, not allowed"?

[Q] Rooting from stock 3.1

OK, I may be overlooking something but I would rather ask than brick my xoom. I cant seem to find a thread that fits my situation.
I relocked and flashed all stock software to get the 3.1 update so im locked and stock with 3.1. I would like to root and flash CWR. Can someone point out the right Boot.img, recovery.img ect for me to use. I would hate to mess something up.
Thank guys
----------Edit--------------------------
NVM. This is what I did................
All steps below were for my 3G Verizon Wireless Xoom. The steps are almost the same for WiFi but the files you need to download are different and must be found on the threads listed below.
I have attached all the files listed in 3.1 Root and Recovery Tools.rar
Unlocked and rooted my Xoom
Steps found here:
http://forum.xda-developers.com/showthread.php?t=968342
1. Download the Motorola Xoom Root Zip file and unzip it. (I replaced this file with the root31.img)
2. Place the files in the SDK Tools folder.
3. adb reboot bootloader (You can skip the next 3 steps if you’ve unlocked with fastboot previously)
5. fastboot oem unlock (wait for reboot)
6. adb reboot bootloader
7. fastboot flash boot (name of new boot.img(root31.img attached))
7. fastboot reboot (wait for reboot)
(you might need to enable usb debuging here)
8. adb remount
9. adb shell push su /system/bin
10. adb shell ln –s /system/bin/su /system/xbin/su
11. adb shell chmod 4755 /system/bin/su
12. adb push Superuser.apk /system/app
_______________________________________________________
Flashed CWR
Steps found here:
http://forum.xda-developers.com/showthread.php?t=1074979
1. Download the recovery image ( I used the image that keeps charging light on)
2. Pull up your command prompt
3. Adb reboot bootloader
4. Fastboot flash (name of recovery.img (CWR.img attached))
5. Fastboot reboot
_______________________________________________________
Flashed Kernal
Steps found here:
http://forum.xda-developers.com/showthread.php?t=978013
1. Reboot into recovery.
2. Go into "mounts and storage"
3. Select "mount USB storage"
4. Your SD Card will now be mounted on your computer. Drop the kernel (and boot image pack if applicable) onto SD Card.
5. "Go Back" then go into "install zip from sdcard" then "choose zip from sdcard"
6. If you are flashing a boot image pack, flash it first. Then flash the kernel zip.
7. Back out to main menu and reboot.
_______________________________________________________
I am not taking credit for any of these steps I am simply trying to put the info in one place for people who need it.

If you have a wifi only > http://forum.xda-developers.com/showthread.php?t=1078019
Sent from my Xoom using Tapatalk

How I rooted my Thunderbolt 2.11.605.9

I got a new Thunderbolt and it came with 2.11.605.9 on it and would not downgrade no matter what I tried.
All these instructions and links came from several different posts on various forums.
This is the combination of things that worked for me to gain root access to the device.
The information and links I take no credit for.
Hope this helps someone as it has helped me.
I did not loose my data with this.
The text in purple are links to needed files, just put http:// in front of them.
Unlock the bootloader
htcdev.com/bootloader
Install Clockwork
• Get fastboot and adb tool for windows here: forum.xda-developers.com/attachment.php?attachmentid=630611&stc=1&d=1308537076
• Get Fastboot and adb for linux here: forum.xda-developers.com/attachment.php?attachmentid=630613&stc=1&d=1308537331
• Obtain clockworkmod recovery:
• HTC Thunderbolt/Mecha cwm-4.0.1.4-mecha.img: downloads.unrevoked.com/recoveries/cwm-4.0.1.4-mecha.img
• md5 : 7990c4d2a5967c0e2c694ba75a65b99d
• Move the recovery.img above to the same directory/folder/map as fastboot and navigate there with an open cmd prompt (WIN) or terminal (LINUX).
• Put the phone is Fastboot USB mode
Type adb devices and press enter. This should output your phones serial number
Type adb reboot bootloader and press enter. This will boot you into the fastboot screen (white with colored letters)
• Type fastboot flash recovery recovery_name.img replacing recover_name with the name of the file you wish to flash and press enter. <<< from a command line (use root for Linux- sudo ./fastboot flash recovery recovery_name.img)
Install the su package
goo-inside.me/superuser/su-3.0-efgh-signed.zip
1. Copy su-3.0-efgh-signed.zip to your sdcard root
2. Start clockworkmod recovery :
---A. Unplug USB
---B. Turn the device off
---C. Hold volume down button (HOLD IT) and press power
---D. Hboot will start. Navigate to recovery with the vol down button. Press power to select and enter recovery.
3. Select "install zip from sdcard"
4. Then select "Choose zip from sdcard"
5. Then select "su-3.0-efgh-signed.zip"
6. Then select "Yes - install su-3.0-efgh-signed.zip" to confirm
7. Then go back
8. Then reboot.
9. You're rooted!
Install Superuser from the market.
Install SuperManager from the market.
Install Busybox from the market.
Install Terminal Emulator from the market.
You can flash ROMs in the same manner the SU package was flashed.
If you want to edit / change system files you can su then remount the FS to rw with the following command within terminal or adb shell :
mount -o remount,rw -t ext3 /dev/block/mmcblk0p25 /system

snaganalf said:
I got a new Thunderbolt and it came with 2.11.605.9 on it and would not downgrade no matter what I tried.
All these instructions and links came from several different posts on various forums.
This is the combination of things that worked for me to gain root access to the device.
The information and links I take no credit for.
Hope this helps someone as it has helped me.
I did not loose my data with this.
The text in purple are links to needed files, just put http:// in front of them.
Unlock the bootloader
htcdev.com/bootloader
Install Clockwork
• Get fastboot and adb tool for windows here: forum.xda-developers.com/attachment.php?attachmentid=630611&stc=1&d=1308537076
• Get Fastboot and adb for linux here: forum.xda-developers.com/attachment.php?attachmentid=630613&stc=1&d=1308537331
• Obtain clockworkmod recovery:
• HTC Thunderbolt/Mecha cwm-4.0.1.4-mecha.img: downloads.unrevoked.com/recoveries/cwm-4.0.1.4-mecha.img
• md5 : 7990c4d2a5967c0e2c694ba75a65b99d
• Move the recovery.img above to the same directory/folder/map as fastboot and navigate there with an open cmd prompt (WIN) or terminal (LINUX).
• Put the phone is Fastboot USB mode
Type adb devices and press enter. This should output your phones serial number
Type adb reboot bootloader and press enter. This will boot you into the fastboot screen (white with colored letters)
• Type fastboot flash recovery recovery_name.img replacing recover_name with the name of the file you wish to flash and press enter. <<< from a command line (use root for Linux- sudo ./fastboot flash recovery recovery_name.img)
Install the su package
goo-inside.me/superuser/su-3.0-efgh-signed.zip
1. Copy su-3.0-efgh-signed.zip to your sdcard root
2. Start clockworkmod recovery :
---A. Unplug USB
---B. Turn the device off
---C. Hold volume down button (HOLD IT) and press power
---D. Hboot will start. Navigate to recovery with the vol down button. Press power to select and enter recovery.
3. Select "install zip from sdcard"
4. Then select "Choose zip from sdcard"
5. Then select "su-3.0-efgh-signed.zip"
6. Then select "Yes - install su-3.0-efgh-signed.zip" to confirm
7. Then go back
8. Then reboot.
9. You're rooted!
Install Superuser from the market.
Install SuperManager from the market.
Install Busybox from the market.
Install Terminal Emulator from the market.
You can flash ROMs in the same manner the SU package was flashed.
If you want to edit / change system files you can su then remount the FS to rw with the following command within terminal or adb shell :
mount -o remount,rw -t ext3 /dev/block/mmcblk0p25 /system
Click to expand...
Click to collapse
Sent from my ADR6400L using XDA App

i used these steps and I still have s on. When I tried to flash a new rom it gets stuck at the htc boot screen. Any help would be great!

I think I would use the downgrade to .5 then revolutionary from there..
something like this http://forum.xda-developers.com/showthread.php?t=1401959

z71kris said:
I think I would use the downgrade to .5 then revolutionary from there..
something like this http://forum.xda-developers.com/showthread.php?t=1401959
Click to expand...
Click to collapse
I tried this just now but when it goes through the integrity check it does not give me the option to update.

Yes, if you can downgrade at all do it that way. It's much simpler. If you aren't familiar with linux the above will be a hassle for you.
Reason being is, you have to remount the file system to read write every time you want to make a change. It resets to read only on reboot. Thus the s-on.

the weird thing is I already have a rooted devices cause I have the cwm recover still loaded on my device. Just can not flash anything over it. Im on windows 7 right now but I dual boot my laptop with linux mint.

I haven't tried to flash a ROM yet. I just wanted access to some system files so I could edit them.
But according to the post I got the Clockwork info from the below steps should work to flash ROMs.
1. Copy <ROMname>.zip (where <ROMname> is the name of the ROM zip file) to your sdcard root
2. Start clockworkmod recovery :
---A. Unplug USB
---B. Turn the device off
---C. Hold volume down button (HOLD IT) and press power
---D. Hboot will start. Navigate to recovery with the vol down button. Press power to select and enter recovery.
3. Select "install zip from sdcard"
4. Then select "Choose zip from sdcard"
5. Then select "<ROMname>.zip"
6. Then select "Yes - install <ROMname>.zip" to confirm
7. Then go back
8. Then reboot.
I don't know however if the ROM has to be signed.

need a hero
I followed this guide and every other guide to root my phone. I could not downgrade the way the other guides told me to the 2.11.605.5 at all. I followed this guide and when i was in the bootloader i did the whole fastboot flash and it worked but now my phone still says s-on (strange thing is that I have the clockwork recovery). I can flash any rom but nothing will take and I either go into bootloop or will not boot past splash screen. I need a true hero to save the day. It is my only phone and means of communication.

Did you get SU and busybox installed?

I'm not sure, I can't boot in any rom so if it was in the su.zip this guide linked me to yes, if not i didn't. Could this be the problem? Can I fix it through h-boot or recovery?

The method I used will allow root access but does not give you s-off.
I'm still looking for what has to be done for that.
apparently you have to have s-off in order to flash a ROM.

I was able to flash skyraider and now have my phone up and running. I updated superuser, installed Rom manager and flashed clockwork recovery. My phone still says s-on and will not boot any bamf 3.5 roms or the eternity rom, so I'm still kinda confused as to why. I would love to have a sense 3.5 Rom but I'm stumped...

That is strange, being able to flash one ROM but not others.
I still think it's got to do with the s-on/s-off.
Supposedly ICS is coming for the T-Bolt soon.
I'm hoping it won't be locked down like 2.11.605.9 is.

i rooted as soon as rooting was available, no downgrading or anything, it was easy as pie. js

Have you tried going to revolutionary's site after the OP method and try to get s-off... HTC method will not give you s-off & is not a true rooting tool..

Big thanks to the OP for putting this together!
This was the only way for me to gain root on a factory flashed 605.9 phone.
EDIT: i'm a linux user so i thought i would share what i did to get root. it's basically what the OP did with a linux twist.
1) Get Fastboot and adb for linux here: forum.xda-developers.com/attachment.php?attachmentid=630613&stc=1&d=1308537 331
2) Extract the zip to your home directory.
3) open a terminal and issue the following command: sudo chmod 777 fastboot adb
4) Unlock the bootloader using this site: htcdev.com/bootloader
5) you will need to register/login to use the unlocking features of this site.
6) once logged in follow the "unlock device" links to get to the instructions. use these instructions to put the phone into fastboot mode and connect it to the computer. you can ignore the rest of the instructions as most of them are for windows. just click through until you get to the part about submitting an "unlock token".
7) with the phone in fastboot mode and connected to the computer issue the following command in a terminal: sudo ./fastboot oem get_identifier_token
8) copy this token into the submit box and edit to make it look similar to the example on the same page. submit the token and you'll get an email with a file "Unlock_code.bin"
9) save "Unlock_code.bin" to your home folder then issue the command: sudo ./fastboot flash unlocktoken Unlock_code.bin
10) download clockwork recovery to your home folder from here: downloads.unrevoked.com/recoveries/cwm-4.0.1.4-mecha.img
11) issue the command: sudo ./fastboot flash recovery cwm-4.0.1.4-mecha.img
12) Download and install the superuser package
goo-inside.me/superuser/su-3.0-efgh-signed.zip
1. Copy su-3.0-efgh-signed.zip to your sdcard root
2. Start clockworkmod recovery :
---A. Unplug USB
---B. Turn the device off
---C. Hold volume down button (HOLD IT) and press power
---D. Hboot will start. Navigate to recovery with the vol down button. Press power to select and enter recovery.
3. Select "install zip from sdcard"
4. Then select "Choose zip from sdcard"
5. Then select "su-3.0-efgh-signed.zip"
6. Then select "Yes - install su-3.0-efgh-signed.zip" to confirm
7. Then go back
8. Then reboot.

s off??
mechanizedmedic said:
Big thanks to the OP for putting this together!
This was the only way for me to gain root on a factory flashed 605.9 phone.
EDIT: i'm a linux user so i thought i would share what i did to get root. it's basically what the OP did with a linux twist.
1) Get Fastboot and adb for linux here: forum.xda-developers.com/attachment.php?attachmentid=630613&stc=1&d=1308537 331
2) Extract the zip to your home directory.
3) open a terminal and issue the following command: sudo chmod 777 fastboot adb
4) Unlock the bootloader using this site: htcdev.com/bootloader
5) you will need to register/login to use the unlocking features of this site.
6) once logged in follow the "unlock device" links to get to the instructions. use these instructions to put the phone into fastboot mode and connect it to the computer. you can ignore the rest of the instructions as most of them are for windows. just click through until you get to the part about submitting an "unlock token".
7) with the phone in fastboot mode and connected to the computer issue the following command in a terminal: sudo ./fastboot oem get_identifier_token
8) copy this token into the submit box and edit to make it look similar to the example on the same page. submit the token and you'll get an email with a file "Unlock_code.bin"
9) save "Unlock_code.bin" to your home folder then issue the command: sudo ./fastboot flash unlocktoken Unlock_code.bin
10) download clockwork recovery to your home folder from here: downloads.unrevoked.com/recoveries/cwm-4.0.1.4-mecha.img
11) issue the command: sudo ./fastboot flash recovery cwm-4.0.1.4-mecha.img
12) Download and install the superuser package
goo-inside.me/superuser/su-3.0-efgh-signed.zip
1. Copy su-3.0-efgh-signed.zip to your sdcard root
2. Start clockworkmod recovery :
---A. Unplug USB
---B. Turn the device off
---C. Hold volume down button (HOLD IT) and press power
---D. Hboot will start. Navigate to recovery with the vol down button. Press power to select and enter recovery.
3. Select "install zip from sdcard"
4. Then select "Choose zip from sdcard"
5. Then select "su-3.0-efgh-signed.zip"
6. Then select "Yes - install su-3.0-efgh-signed.zip" to confirm
7. Then go back
8. Then reboot.
Click to expand...
Click to collapse
will this get s off? I dont think it does I did this with windows 7 and it didnt seaem to work

I think this is solved
topdogle1 said:
will this get s off? I dont think it does I did this with windows 7 and it didnt seaem to work
Click to expand...
Click to collapse
There is a thread about not having to downgrade that I was able to use to get s off in the Thunderbolt forums. search "Downgrade to get S-off is now unneccessary":laugh:

LaBlondeJames said:
There is a thread about not having to downgrade that I was able to use to get s off in the Thunderbolt forums. search "Downgrade to get S-off is now unneccessary":laugh:
Click to expand...
Click to collapse
This post HTCDev unlocks, but sadly does not S-OFF.
tool in sig but if you did this and unlocked you will have to wipe data to use it. (email me for instructions)

stuck with bootloop and no alternative rom

i have a slight problem. i grabbed the ubuntu touch alpha and went in to recovery, loaded it (according to thread instructions) but ended up with a bootloop.
in the end i thought "lets just put another rom back on for now" and then realised i had deleted the other rom from the sdcard! so i'm stuck with it not booting in to ubuntu, and not able to get another rom on as it doesn't boot in.
can i connect to the internal sdcard area myself by plugging the usb in to the pc or something?
i have twrp loaded as recovery
thanks

ah, TWRP adb sideload to the rescue!

problem
my problem is stuck in boot screen after i did super wipe full what should i do? i have cwm 5.5.0.4. i try flash from sd put it says no files found

partti86 said:
my problem is stuck in boot screen after i did super wipe full what should i do? i have cwm 5.5.0.4. i try flash from sd put it says no files found
Click to expand...
Click to collapse
The issue, Superwipe wipes the internal /sdcard/ and also this is where it flashes from.
You need to boot to recovery and then use ADB to push files to the sdcard.
If you have never used ADB, it can be a bit daunting.
First, you need adb from the Android SDK. It is a big file for the few you need. I have a copy of the relevant ADB files here: https://db.tt/b9dQ6xzp
Unzip this to c:\adb folder on windows. If you are using Linux, it should already have adb in the /usr/bin/ folder.
Next, you need the Universal Naked Drivers: http://forum.xda-developers.com/attachment.php?attachmentid=1934814&d=1367674531
Unzip these to c:\universal_naked_drivers
Boot to CWM and then plug in your USB cable. It should show a new device found. It may find 2, an MTP and then there should be another either Unknown device or an Android ADB device. Right click and update the driver. Be sure to search for driver, then tell it you want to pick from a list. Hit the Have Disk button and then hit the browse button and browse to c:\universal_naked_drivers and hit OK. It should show you a driver to select and hit OK. If you are using Win 8, there is an additional step that is required to used non-signed drivers.
Once the driver is updated, download the zip file you want to flash on your PC. I assume it is a ROM.zip file for this example. Place this file in the c:\adb folder and call it ROM.zip (can be named something else, but this is what we will use for this example).
Now, open a command prompt and execute the following:
Code:
> [B]c:[/B]
c:\> [B]cd c:\adb[/B]
c:\adb> [B]adb devices[/B]
It will probably say some messages about the daemon is not running, restarting adb.
Then it should show a list. There should be some numbers followed by "recovery"
If no devices are shown, check that your ADB device is showing in the Device Manager.
Once you see it in the adb devices list, continue:
Code:
c:\adb> [B]adb push ROM.zip /sdcard/[/B]
successfully pushed xxx bytes
c:\adb>
At this point you should now see the ROM.zip file on the internal storage in CWM to allow you to install it.
Choose to install the file then reboot (not to recovery). You have to let it flash the file (progress bar will show). Once the screen goes black and the progress bar disappears, it should now boot to your ROM..
If your ROM requires a custom kernel and/or GAPPS to be flashed, use the same procedure to push your kernel.zip and GAPPS.zip to the /sdcard/ directory.

mk2media said:
ah, TWRP adb sideload to the rescue!
Click to expand...
Click to collapse
Can you explain what you did please? what is adb sideload?

Toolless Mi A1 rooting guide NOOB FRIENDLY (bootloader, twrp, root, rom)

DISCLAMER: DOING THIS MIGHT RESET YOUR PHONE SO PLEASE BACKUP YOUR FILES BEFORE DOING THIS
now lets get started
download this tool (even if you already have adb and fastboot)*
https://forum.xda-developers.com/showthread.php?t=2317790
and go to your phone's settings then System > about phone and press on build number until it tells you: "you have developer options"
now go to System > developer options and enable android debugging and OEM Unlocking
now plug your phone into the pc and open the file: "cmd-here.exe" from the tool you downloaded
now type adb devices and it will probably tell you unauthorized, if it does then open your phone and click on accept
if you dont see any thing other than "list of devices attached" then download this
open it and input in, N and then Y so you dont install adb but you do install the phone's drivers
now type adb devices and you should see random numbers, if it says unauthorized just go back to when I said how to fix it
so now that everything is working type in the command prompt: adb reboot bootloader
now you should see a russian cat fixing a android machine with blue text: "FASTBOOT"
now type "fastboot oem unlock" and it should unlock your phone
now type "fastboot reboot"
--------------------------------------------------------
good, Now you have the bootloader unlocked
--------------------------------------------------------
If you are now put in the setup screen don't do it, just shut down your phone and then when it's shutdown hold on the power button and volume down buttons until you enter fastboot again
now go to this page: https://github.com/CosmicDan-Android/android_device_xiaomi_tissot/releases and download the latest boot only and regular versions
put them both in the adb (tool) folder and type in the command prompt: "fastboot boot boot-recovery.img"
if your phone doesnt do anything (doesn't do anything in the 30s after you input the command) then restart it and get it back in fastboot and type fastboot --set-active=b
and then type the previous command again, if that doesnt work then restart your phone back to fastboot again
and then type fastboot --set-active=a and the command "fastboot boot boot-recovery.img" and it should work
so now you will be in twrp, good!
type "adb push (regular twrp zip name, remember to put .zip at the end!) /sdcard/"
example:"adb push TWRP-Installer-3.2.1-with-Tissot-Manager-2.5.zip /sdcard/"
and then in your phone go to install and you should already be in /sdcard if not then go there and then tap on the zip and swipe on the thing
after it finishes installing go to reboot and then tap on recovery
--------------------------------------------
good now you have TWRP installed!
-------------------------------------------
Now its up to you, do you want to install only root or rom and root? its up to you
Root Only:
Download Magisk (you can also use SuperSU but I strongly recommend magisk)
put it in your adb (tool) folder and type "adb push (magisk's zip name, remember to put .zip at the end!) /sdcard/"
example:"adb push Magisk-v17.1.zip /sdcard/"
go to install, press on the zip file and swipe on the thing and click on restart system at the end
and congrats! you have root on your phone!
Rom:
If were talking about a treble rom then you should follow this guide: https://forum.xda-developers.com/mi-a1/how-to/treble-stock-to-treble-everything-to-t3793734 but if not you can continue using this one
download your favorite rom and download magisk (you can also use SuperSU but I strongly recommend magisk)
also go to opengapps.org choose arm64 and the android version your rom is and I recommend the nano variant
now in twrp tap on Wipe and Advanced Wipe and choose everything there (you dont have to choose micro SDcard tho) and swipe THIS WILL RESET YOUR PHONE AGAIN BUT YOU PROBABLY DONT CARE ABOUT THAT RIGHT NOW
now in the command prompt type: "adb push (rom zip name, remember to put .zip at the end!) /sdcard/"
example:"adb push RR-O-v6.1.0-20180709-Official /sdcard/"
and install it, some roms include gapps and other things in their installation for example: pixel experience. but most roms don't have that
so if you check the xda page and they say nothing about including opengapps in the rom then you should be able to fully follow the next steps.
type "adb push (magisk zip name, remember to put .zip at the end!) /sdcard/" and install it
then type "adb push (opengapps zip name, remember to put .zip at the end!) /sdcard/" and install it
now tap on reboot system and congrats! you just rooted and custom rom-ed your phone!
* "even if you already have adb and fastboot" the reason for this is because that link uses the newest version (or new enough) that is surprisingly not common in other places I downloaded adb and fastboot. the new version adds a new command that is used in the guide if you are experiencing a certain problem
I hope I helped you, if you have any questions or problems post them in the comments

a big THANK YOU
Months ago I rooted and installed a new ROM for first time in my life and, although I read another guides, with them I always break my phone, so I must flash and start again. And your guide, 4 months later, saved me again. I don't know why, really. Maybe because is super friendly. But thank you, again. The only thing I'll add is wtf to do when TWRP asks if install in slot a or b because that's the point I always mess it :'(
Thank you forever

vainille said:
The only thing I'll add is wtf to do when TWRP asks if install in slot a or b because that's the point I always mess it :'(
Click to expand...
Click to collapse
You mean when you flash the rom it asks you which slot to install to?