Database Info

[Guide] How to Install TWRP & Root Essential PH-1(Method 2)

How to Install TWRP Recovery & Root Essential PH-1 (Windows/Mac/Linux)​​​
This is an alternate method on how install TWRP. This one might give you a better understanding of slots.
Another method can be found at below link. Use whatever is easier for you.
https://forum.xda-developers.com/essential-phone/how-to/guide-rooting-essential-ph-1-magisk-t3701976
Warning 1: If you can't do fastboot commands, do a flash all, root your device or flash TWRP/ROM, please do not ask for help here. If you cannot flash all back to stock, please stay stock for everyone's sake.
Warning 2: You might loose all your data. Make sure to backup your data.
Code:
/*
* Your warranty is now void.
*
* I am not responsible for bricked devices, dead SD cards,
* thermonuclear war, or you getting fired because the alarm app failed. Please
* do some research if you have any concerns about features included in this ROM
* before flashing it! YOU are choosing to make these modifications, and if
* you point the finger at me for messing up your device, I will laugh at you.
*/
Pre-Requisites
Make sure you have unlocked the bootloader.
Download and Install drivers (Windows) :- https://storage.googleapis.com/essential-static/Essential-PH1-WindowsDrivers.exe
Make sure to remove pin/password/pattern etc. Even though TWRP support decryption I personally suggest you remove it and can add it back later.
Make sure you are stock. If you are rooted, please install stock boot.img.
How to Boot into fastboot/bootloader mode
1. Reboot phone, and keep volume down pressed while device is rebooting until you see bootloader mode screen.
2. While phone is off, press volume down and then press power button. Keep holding both until you see bootloader mode screen.
How to Install
Steps
1. Download all the files listed in downloads section and place them inside one folder say ph-1.
2. Unzip fastboot and adb zip file (platform-tools). Rename twrp image file to twrp-mata.img. move twrp img file to platform-tools folder.
3. Connect phone to computer and copy below files to internal memory.
* TWRP Installer Zip
* Magisk Zip
Reboot device into bootloader mode.
4. Using command prompt/terminal navigate to folder where fastboot is.
Command Prompt
Code:
fastboot devices
Mac/Linux/Powershell
Code:
./fastboot devices
Make sure device is detected in fastboot mode.
5. Find current slot. Note this down some where.
Command Prompt
Code:
fastboot getvar current-slot
Mac/Linux/Powershell
Code:
./fastboot getvar current-slot
6. If you get current slot as
* A - we will flash twrp to slot B
* B - we will flash twrp to slot A
7. Flash TWRP to slot opposite of what we found out in Step 5.
Command Prompt
Code:
fastboot flash boot_slot twrp-mata.img
Mac/Linux/Powershell
Code:
./fastboot flash boot_slot twrp-mata.img
So, if your current slot was a, you will use boot_b above. If current slot was b, you will use boot_a above.
8. Set slot where we flashed TWRP as active.
Command Prompt
Code:
fastboot --set-active=slot
Mac/Linux/Powershell
Code:
./fastboot --set-active=slot
So, if your current slot was a, you will use --set-active=b above. If current slot was b, you will use --set-active=a above.
9. Use volume rockers till you see recovery option. Then press power button to select. You should now boot into TWRP.
If the touchscreen doesn't function, skip to instructions in post 2 below.
Now, flash TWRP installer zip file.
Once zip is flashed and has patched both slots. Go back to home screen.
Reboot.
On this screen select the slot which we had noted down in step 5.
Then reboot into system. You should now boot into Android.
10. To root. Boot back into bootloader mode. Go into TWRP recovery. Flash magisk zip. reboot.
Support :
1) Search. Search, search, search. If you make the effort of reading atleast 5 pages back, most if not all your questions will be answered. I personally, will ignore any questions, if I know they have been answered in the last 5 pages. Not being rude, but please read.
2) If you can't find answers in last 5 pages, ask here, be respectful and have a good time.
Video Guide
Downloads :
Latest ADB & Fastboot Zip File :- https://developer.android.com/studio/releases/platform-tools
TWRP for Essential Phone (need both .img and zip file) :- https://forum.xda-developers.com/es...official-twrp-3-2-3-0-essential-ph-1-t3840931
Magisk :- https://forum.xda-developers.com/apps/magisk/official-magisk-v7-universal-systemless-t3473445
Going Back to Stock :- https://forum.xda-developers.com/essential-phone/development/stock-7-1-1-nmj20d-t3701681
If you flashed September Android 9.0 Pie Back to Stock (BTS) it flashes to both slots. In that case, if touch is not working please refer post 2.
Credits
@Dees_Troy for TWRP
@aer0zer0 for back to stock (BTS)
@topjohnwu for Magisk
@munchy_cool for this guide

reserved
Common Issues
Thanks to @starcms for helping with the instructions.
No touch in TWRP in Step 9.
Keep your phone connected to computer. Open command prompt/terminal/powershell.
Now we are going to install TWRP installer zip.
Command Pormpt
Code:
adb shell twrp install path/to/zip
So, let's say you have twrp installer zip (named
twrp-installer-mata-3.2.3-0.zip) in root of internal memory.
Code:
adb shell twrp install /sdcard/
twrp-installer-mata-3.2.3-0.zip
This should flash TWRP to both slots. Now, you can reboot using
Code:
adb reboot bootloader
and go back into TWRP. Check if touch is working and then set your slot to one noted in step 5.
If touch is not working use fastboot (step 8) to change the slot to that noted in Step 5..
Now boot back into TWRP using volume rockers and proceed to Step 10 (flashing Magisk zip)
Terminal/Powershell users please add ./ before the adb.

reserved 002
reserved 002

Nice write-up. I would also maybe add (to your discretion ofc) that if you flash the latest P BTS, it flashes to both slots, making touch unusable in twrp and will need to follow your addendum.

aer0zer0 said:
Nice write-up. I would also maybe add (to your discretion ofc) that if you flash the latest P BTS, it flashes to both slots, making touch unusable in twrp and will need to follow your addendum.
Click to expand...
Click to collapse
Done. Thanks for the advice :highfive:

Uh I...have a new problem. I use "adb shell twrp install" to install twrp-installer-mata-3.2.3-0.zip and it seem to work...but later I flash the stockboot and flash magisk. Than I cant boot into the system. It reboot itself to the stock recovery when it finished booted. And told me cant start up the system and two options down below "try again" "factory reset"
Is my stockboot file is incorrect?

YunolexDDP said:
Uh I...have a new problem. I use "adb shell twrp install" to install twrp-installer-mata-3.2.3-0.zip and it seem to work...but later I flash the stockboot and flash magisk. Than I cant boot into the system. It reboot itself to the stock recovery when it finished booted. And told me cant start up the system and two options down below "try again" "factory reset"
Is my stockboot file is incorrect?
Click to expand...
Click to collapse
recovery is part of boot image. if you flash stock boot, twrp is removed.

munchy_cool said:
recovery is part of boot image. if you flash stock boot, twrp is removed.
Click to expand...
Click to collapse
Yeah i know but now i wonder where goes wrong with my phone
Seem my English is not very good so....I dont know how to search the key word
So..I wonder if you have seem this situation before.

YunolexDDP said:
Yeah i know but now i wonder where goes wrong with my phone
Seem my English is not very good so....I dont know how to search the key word
So..I wonder if you have seem this situation before.
Click to expand...
Click to collapse
after installing twrp zip, if you instal stock boot or new kernel it will remove twrp.
you have to flash twrp zip after installing new kernel.
to root, boot into android once after instalinh twrp zip.
then boot back into twrp, and flash magisk zip.

munchy_cool said:
after installing twrp zip, if you instal stock boot or new kernel it will remove twrp.
you have to flash twrp zip after installing new kernel.
to root, boot into android once after instalinh twrp zip.
then boot back into twrp, and flash magisk zip.
Click to expand...
Click to collapse
I am pretty close it. Now i have my twrp install in one slot and the system can boot from another slot but uh..
do I need to flash stock boot before I flash magisk?
cus now I still cant boot the system from twrp..
the official website said "use the devices as normal" hmm..
I need to change the slot if i want to boot the system. Is that normal?

YunolexDDP said:
I am pretty close it. Now i have my twrp install in one slot and the system can boot from another slot but uh..
do I need to flash stock boot before I flash magisk?
cus now I still cant boot the system from twrp..
the official website said "use the devices as normal" hmm..
I need to change the slot if i want to boot the system. Is that normal?
Click to expand...
Click to collapse
NO you don't need to flash stock boot to instal Magisk.
yes, you need to change slot to boot system.
all of this is mentioned in first post.

i have a question, is there a way to just boot into TWRP to just flash magisk? without flashing TWRP itself? i want to recive OTAs still and all i want is just magisk installed, i tried the ,ethod of patching the boot.img but that was a huge fail please help!!!

DeimosPhobos said:
i have a question, is there a way to just boot into TWRP to just flash magisk? without flashing TWRP itself? i want to recive OTAs still and all i want is just magisk installed, i tried the ,ethod of patching the boot.img but that was a huge fail please help!!!
Click to expand...
Click to collapse
No.
We don't have fastboot boot

aer0zer0 said:
No.
We don't have fastboot boot
Click to expand...
Click to collapse
Ahhhh ok,
I figured out the patched boot image method, although when I tried to make my own patched boot IMG, it didn't work, I found a Reddit thread where someone had done it, I used theirs and it worked....although the command was supposed to be fastboot flash boot patched_boot.img and Everytime I did that it sent it to B, but failed on the write, they yelled at me saying that's the command and it should work lol, but I had to actually put fastboot flash boot_b patched_boot.img....the damn A/B partition stuff confuses me Alot lol

DeimosPhobos said:
Ahhhh ok,
I figured out the patched boot image method, although when I tried to make my own patched boot IMG, it didn't work, I found a Reddit thread where someone had done it, I used theirs and it worked....although the command was supposed to be fastboot flash boot patched_boot.img and Everytime I did that it sent it to B, but failed on the write, they yelled at me saying that's the command and it should work lol, but I had to actually put fastboot flash boot_b patched_boot.img....the damn A/B partition stuff confuses me Alot lol
Click to expand...
Click to collapse
sometimes older fastboot versions dont work well with Essential.
for ab slots, if you are want to flash magisk pre-rooted boot.img
just do
fastboot gervar current-slot (say you get a)
and then flash boot.img to current slot.
fastboot flash boot_a nameofboot.img

munchy_cool said:
sometimes older fastboot versions dont work well with Essential.
for ab slots, if you are want to flash magisk pre-rooted boot.img
just do
fastboot gervar current-slot (say you get a)
and then flash boot.img to current slot.
fastboot flash boot_a nameofboot.img
Click to expand...
Click to collapse
essential's driver package for windows doesnt require _a,_b unless you are being specific
fastboot flash boot whatever will work and flash to the current slot if your using essentials (which is an older version) if your using a newer version from google or minimal, it gives the __a or b error trying to append an extra underscore

aer0zer0 said:
essential's driver package for windows doesnt require _a,_b unless you are being specific
fastboot flash boot whatever will work and flash to the current slot if your using essentials (which is an older version) if your using a newer version from google or minimal, it gives the __a or b error trying to append an extra underscore
Click to expand...
Click to collapse
true, but not everyone is on Windows :highfive:

munchy_cool said:
true, but not everyone is on Windows :highfive:
Click to expand...
Click to collapse
Poor Linux folks ?

aer0zer0 said:
Poor Linux folks
Click to expand...
Click to collapse
lol.
Essential is the only phone to give me issues with fastboot though.

munchy_cool said:
lol.
Essential is the only phone to give me issues with fastboot though.
Click to expand...
Click to collapse
Tell me about it, lol.
---------- Post added at 12:00 PM ---------- Previous post was at 11:46 AM ----------
aer0zer0 said:
Tell me about it, lol.
Click to expand...
Click to collapse
Never seen a phone so finicky. I've also got the holy Grail cable that I don't let out of my sight. I've often wondered what makes it so finicky, and I come from a long line of HTC and motos

help with rooting a oneplus 6 using linux terminal (not windows)

This is my first time rooting a phone but Im defiantly in over my head and think i almost broke the oneplus 6 when i was trying to enter commands in the linux terminal. So far I have unlocked bootloader and am currently stuck trying to figure out a) what exactly the twrp recovery really does, b) which is the right files to download, c) the proper commands to flash custom recovery in a linux terminal. Thanks in advance to anyone who can help me.

Command you need is fastboot boot (recovery name). Replace recovery name with whatever you called the download of the twrp image file.
Twrp is necessary to flash custom ROMs, kernels and magisk.
After flashing rom you need to flash twrp zip of your choice to maintain recovery otherwise it is overwritten by stock recovery.
There is a helpful guide I will post the link to
Here
https://r.tapatalk.com/shareLink?ur...share_tid=3792643&share_fid=3793&share_type=t
Sent from my ONEPLUS A6003 using Tapatalk

The commands for Linux and Windows are nearly identical. You just need to use the Linux version of adb instead of adb.exe.
TWRP is a custom recovery. It's similar to the GRUB bootloader for Linux, but more touch interface friendly. It allows you to make edits to the system, backup the system, and install custom zip's for the system.

keep getting error
when i run command to flash recovery (sudo fastboot flash twrp-3.2.1-0-enchilada.img) i keep getting this error:
unknown partition 'twrp-3.2.1-0-enchilada.img'
error: cannot determine image filename for 'twrp-3.2.1-0-enchilada.img'

Instead of trying to flash twrp from fastboot do a sudo fastboot boot <image name> then flash the zip while in twrp...
Sent from my ONEPLUS A6003 using Tapatalk

Thanks bkeaver for the advice and im glad to say I finally got that phone rooted. One more obstical I experienced was the phone not booting into twrp instead it was locking up on a screen that said Qualcomm crash dump mode. I unplugged and rebooted by holding the power button. From what I could read online it had to do with compatibility issues with Android pie. The Blu_Spark TWRP img and zip files seemed to do the trick. Anyone else who is experiencing the same issues I suggest you read this page: google.com/amp/s/amp.reddit.com/r/oneplus/comments/9iid4e/unable_to_flash_recovery

Linux_fart_18.3 said:
when i run command to flash recovery (sudo fastboot flash twrp-3.2.1-0-enchilada.img) i keep getting this error:
unknown partition 'twrp-3.2.1-0-enchilada.img'
error: cannot determine image filename for 'twrp-3.2.1-0-enchilada.img'
Click to expand...
Click to collapse
Did you even try to read man page? Just use right syntax, which is identical in Windows BTW.
fastboot flash partition [filename]
http://manpages.ubuntu.com/manpages/xenial/man1/fastboot.1.html

Linux_fart_18.3 said:
From what I could read online it had to do with compatibility issues with Android pie.
The Blu_Spark TWRP img and zip files seemed to do the trick.
Anyone else who is experiencing the same issues I suggest you read this page: google.com/amp/s/amp.reddit.com/r/oneplus/comments/9iid4e/unable_to_flash_recovery
Click to expand...
Click to collapse
In oxygen OS ver.9, you must download "twrp-3.2.3-x_blu_spark_v9.86_op6.img" and "twrp-3.2.3-x_blu_spark_v9.86_op6.zip" from https://forum.xda-developers.com/devdb/project/?id=27466#downloads ,
and launch twrp from this command "fastboot boot twrp-3.2.3-x_blu_spark_v9.86_op6.img".
After your device boot trwp, you can install "twrp-3.2.3-x_blu_spark_v9.86_op6.zip" from your device's internal storage (if you copy into it) or adb side-load mechanizm.
Once zip installed, you don't need to run fastboot to boot twrp recovery (only you reboot the device to fastboot mode and select recovery, trwp boot up).

What's a syntax?
davfiala said:
Did you even try to read man page? Just use right syntax, which is identical in Windows BTW.
fastboot flash partition [filename]
http://manpages.ubuntu.com/manpages/xenial/man1/fastboot.1.html
Click to expand...
Click to collapse
rhetorical question in the title and fyi I will never claim to be very tech savvy thanks for the info though

Root OOS 10.0.1

Hello, i was on android 10 open beta 2 with root
But while upgrading i ran into some complications and now i am on OOS 10.0.1 but dont have root
I tried to install twrp but after pushing through adb the screen says "fastboot mode" and stays there. And after typing fastboot reboot the phone reboots into home screen
I also tried to patch boot image of oos 10.0.1 but it enters into fastboot loop
Any way i can get root?

What happens when you're in fastboot and boot the twrp file?

Phantom Thief said:
What happens when you're in fastboot and boot the twrp file?
Click to expand...
Click to collapse
The whole screen turns black with the words "fastboot mode" in the center

ViperCDX said:
I tried to install twrp but after pushing through adb the screen says "fastboot mode" and stays there. And after typing fastboot reboot the phone reboots into home screen
Click to expand...
Click to collapse
Your description sounds a bit suspicious, like you aren't doing the right method. Or maybe you are not just using the right (precise) terminology. There is a lot of confusion by folks on how to boot/install TWRP properly on this device, so that is why I am pointing this out, and hope you can clarify more specifically so we can then help you.
You don't need to adb push the TWRP.img file to boot TWRP, and you don't "install" TWRP.img using fastboot either. You should be trying to fastboot boot twrp.img, with that img file on your computer.
You do need the Magisk zip on the phone (and adb push is one way); as well as the TWRP installer zip if you intend to install (not just boot) TWRP to the phone. The TWRP installer zip not completely necessary, if you want to just flash Magisk and achieve root (not have TWRP installed on the phone).
Also, are any error messages showing up on your command prompt on the computer, and if so what does it day exactly?
Might be best if you cut/paste your fastboot commands, or post a screenshot of your PC, so we can see exactly what commands you used, error messages, etc.

redpoint73 said:
Your description sounds a bit suspicious, like you aren't doing the right method. Or maybe you are not just using the right (precise) terminology. There is a lot of confusion by folks on how to boot/install TWRP properly on this device, so that is why I am pointing this out, and hope you can clarify more specifically so we can then help you.
You don't need to adb push the TWRP.img file to boot TWRP, and you don't "install" TWRP.img using fastboot either. You should be trying to fastboot boot twrp.img, with that img file on your computer.
You do need the Magisk zip on the phone (and adb push is one way); as well as the TWRP installer zip if you intend to install (not just boot) TWRP to the phone. The TWRP installer zip not completely necessary, if you want to just flash Magisk and achieve root (not have TWRP installed on the phone).
Also, are any error messages showing up on your command prompt on the computer, and if so what does it day exactly?
Might be best if you cut/paste your fastboot commands, or post a screenshot of your PC, so we can see exactly what commands you used, error messages, etc.
Click to expand...
Click to collapse
ok let me try to be as specific as possible.
First i put the "twrp-3.3.1-4-guacamole.img" file in the adb folder and "twrp-3.3.1-4-guacamole.zip" in the internal storage of my phone
Then i switched off my phone, pressed vol up and vol down and power button to enter fastboot mode
i connected my phone to my pc
opened cmd window in the adb folder
typed "fastboot devices" to check if connected
then "fastboot boot twrp-3.3.1-4-guacamole.img"
on pressing enter , i get the 2 ok messages on cmd window and at that point my phones screen goes completely black with "Fastboot mode" written in the center
And stays there that way
now if i type "fastboot reboot" the phone reboots to the home screen
Hope i made it a bit clear
Sorry cant post screenshots at this moment, i am on vacation and dont have my laptop with me

You're using the wrong twrp image. You have to use the one for android q. Unofficial build of twrp for android q is available on the development section. Get that image, fastboot boot twrp.img and then install magisk 20. You don't need to install the twrp zip. You can just boot the image from fastboot whenever you need a custom recovery.
If you absolutely want the recovery, then you can flash it (remember to get the zip for android q) from magisk and then do direct install of magisk then reboot.

kgs1992 said:
You're using the wrong twrp image. You have to use the one for android q. Unofficial build of twrp for android q is available on the development section. Get that image, fastboot boot twrp.img and then install magisk 20. You don't need to install the twrp zip. You can just boot the image from fastboot whenever you need a custom recovery.
If you absolutely want the recovery, then you can flash it (remember to get the zip for android q) from magisk and then do direct install of magisk then reboot.
Click to expand...
Click to collapse
Oh damn, didnt realise that, so silly of me
Will try the android q version and report back

ViperCDX said:
Oh damn, didnt realise that, so silly of me
Will try the android q version and report back
Click to expand...
Click to collapse
Good catch by the previous user, that you need to use an updated TWRP version.
Unofficial version -70 from the following thread is what you want (if you haven't found it already): https://forum.xda-developers.com/on...nt/recovery-unofficial-twrp-recovery-t3931322

redpoint73 said:
Good catch by the previous user, that you need to use an updated TWRP version.
Unofficial version -70 from the following thread is what you want (if you haven't found it already): https://forum.xda-developers.com/on...nt/recovery-unofficial-twrp-recovery-t3931322
Click to expand...
Click to collapse
Yeah i pushed the .70 version through fastboot then flashed the installer
And now i have twrp
However when i try to flash magisk zip through twrp, the phone enters into fastboot mode and does not enter home screen
I have to fastboot boot image to get out of it
I have tried magisk 20.1,20 and 19.4
Kindly help

Hello guys please help me if you know what is this? What can I do? it's bug in Android 10.0.1 or something wrong that show me every minute this error?Show me in every minute this Don't want communicate with E4:5F:8D:9C:06:1A.Wait your answer,thanks.

Failed root, stuck on unlocked bootloader warning message.

Hi everyone,
I have tried to get root priviledges following a guide from Droidwin.com to flash Magisk throught TWRP. At the very last step, after flashing Magisk 19.3 throught TWRP when I tried to reboot my phone, it gets stuck on the "unlocked bootloader warning message", which is supposed to disappear after a few seconds and move on to the boot animation.
It seems like I can go to the stock recovery, which shows fastboot and wipe actions. At this point, I can acces the fastboot screen, but the device is not listed using the ADB command "adb devices", nothing is find.
I'm wondering, what can I try to restore the phone ? I thank you in advance for any suggestions.
Here are some additionnal informations:
---Device---
Oneplus nord running OxygenOS 10.5.5, european version.
---What I've done to get in this situation---
Unlock bootloader using ADB
Launch an TWRP image file using ADB
"Try" to root using Magisk 19.3 zip throught TWRP
Power off from recovery (using TWRP touch interface), but the guide tells to click reboot at this step ...
Get stuck on the warning message, not having any boot animation.

Try to boot in Fastboot.
Turn the Nord Off and start it with plus minus and Power.
Boot TWRP with "Fastboot boot "TWRP File name.img" and flash magisk 20.4

Thank you @denndenn.
I'm able to launch TWRP using the ADB command "fastboot boot [twrpfile].img". But when TWRP starts, it asks me for my decryption password, I type it, brief lines of code says "unable to read system/apex" before showing the home page of TWRP. Someone knows what this means, and if that can be the cause ?
I've then tried to reflash Magisk 19.3, which lead to the same result. I couldn't figure out how load Magisk 20.4 to my internal storage in order to flash it trought recovery ... Do you know how to flash a file which is not on my phone ?

Search forum....
Msm tool oneplus nord wipes phone but fixes any issues

thibdur said:
Thank you @denndenn.
I'm able to launch TWRP using the ADB command "fastboot boot [twrpfile].img". But when TWRP starts, it asks me for my decryption password, I type it, brief lines of code says "unable to read system/apex" before showing the home page of TWRP. Someone knows what this means, and if that can be the cause ?
I've then tried to reflash Magisk 19.3, which lead to the same result. I couldn't figure out how load Magisk 20.4 to my internal storage in order to flash it trought recovery ... Do you know how to flash a file which is not on my phone ?
Click to expand...
Click to collapse
Plug your phone to your PC while in TWRP, then you can use adb to push files to your phone, for example with adb push magisk.zip /sdcard. Then, flash Magisk in TWRP.

How about flashing stock boot to see if your OPN boots to system again and then simply load Magisk zip to your internal storage and then flash via TWRP?

Thank you a lot for your suggestions !
Here is the solution in my case :
Because fastboot was working, I was able to flash stock oxygen rom, and get every working, but it needs to erase all your data.
You can find a guide on the XDA topic "[ROM][STOCK][FASTBOOT][OPN] Stock Fastboot ROMs for OnePlus Nord". The rom list have the lastest roms version (09/2020), and the process is super automated.
Have a good week-end XDA !

Badly f*d Op7Pro. Need help to revert to stock

Hi,
First of all, yes, I have checked the other threads that talk about reverting to stock and I am still stuck.
So I installed Kang OS which is Android 11, and now I want to revert to stock. I have tried downloading multiple different versions of the fastboot ROM from the page https://androidfilehost.com/?w=files&flid=294300 and run the flash all batch file and every time I am either getting stuck in a boot loop or getting the Verity Crash Dump Screen. I have managed to reach the fastboot screen, and I am waiting on the fastboot screen, for someone to show me some way.
Thanks in Advance.

If you used a pin then your storage is encrypted and the rom you are trying to flash can't use it, that's why you're most likely stuck at boot.
I ran into the same issue and posted about it in the same thread. I think we will need a new version of TWRP as 3.4.0-0 would not accept my pin which had not changed.
To fix your issue, sadly, you'll need to wipe your storage:
Boot the phone into fastboot mode
Attach your USB cable to the phone/PC
Download and unzip the file I've attached (ADB/Fastboot)
Launch an elevated command window in the folder you extracted the attached zip to
Try the command fastboot devices and ensure that it reports the device correctly, if not then you need to install the latest OnePlus drivers
Type the following in the command window : fastboot -w (This will wipe the storage)
Try your rom again (TWRP should remain as the recovery if you had flashed it already, if not then copy the latest TWRP img file to the same folder as the ADB/Fastboot tools, use fastboot and type boot twrpfilename.img this will make the phone boot into TWRP recovery, you can then copy over the TWRP zip and flash it to recovery using the booted version of TWRP)
Once you've done the above you shouldn't really need to use the fastboot scripts as the latest rom should just flash from TWRP.

Get msm download tool for guacamole which is the codename of the op7p. I know the shorts with the global version I am unsure if this works with T-Mobile or others?

MSM is a bit of a severe fix when they've already confirmed they can still get fastboot, MSM is for completely bricked phones that can't access anything. Wiping the storage and going to fastboot will allow them to just flash recovery then flash the stock rom. Way easier.

Boot into twrp. Then format data. Phone will boot then.