Database Users

Nexus S Forgot Security PIN

Hey all,
Hopefuly someone can help me otherwise i'm going to have to take this phone back to the o2 shop where I got it from.
I have a Nexus S, was looking at custom roms the other night and decieded to unlock and root it and flash the CyW7 rom onto it.....after a couple hours of playing with the new software I decieded it wasn't for me so flashed the device back to stock 2.3.1 software.
2.3.1 loaded fine and I installed the 2.3.2 update before rooting it so I could install adblock.
Got it all working fine, setup a security PIN (8 digits) and went to bed.
Woke up this morning and found the phone was not accepting the PIN, ive tried rebooting, trying the PIN in different varations incase I setup a wrong PIN in the first place......still no luck
So, i've looked into reflashing the device with stock 2.3.1 software again but USB debug mode isn't on and I can't install the USB drivers in Fastboot mode (says no compatible driver found for my hardware error)
How do I move forward here? Is there anything I can do to fix it?
Thanks a billion for anyone who gives me advice....

Boot into recovery and factory reset.

Boot recovery took me to a error screen where I had to take battery out to reset it.
I've managed to get the USB drivers to work now, and flashed the clockwordmod recovery image, then reset the phone.
Can I just confirm;
Is this the correct proceedure for the Nexus S to stop the Clockwordmod recovery from been removed.
1. Download the custom recovery image and save it to your computer
2. Copy the recovery.img file inside the tools folder of the sdk (so it is in the same folder as fastboot.exe)
3. Then in the command prompt that should still be open, type the following with hitting enter at the end of each line:</p><p>fastboot flash recovery recovery.img
4. Once it is flashed, leave the phone in plugged in and in fastboot mode.
6. Root the Phone
7. In fastboot mode, select Recovery using the volume buttons and power button and wait for it to boot into recovery mode.
8. Download the Superuser flashable zip file and save it to your computer.
9. Once in recovery mode, select Mounts and Storage then select Mount USB Storage so we can transfer files to the sd while it is in recovery mode.
10. Copy the Superuser.zip file to the root of your internal storage (do NOT extract it, do NOT put it in any folders, just on the phones storage itself).
11. Select Unmount on the phone.
12. Select Mount System, then select Go Back to get back to the main menu.
13. Then scroll to flash zip from sdcard and then choose zip from sd card and select the superuser.zip file and wait for it to finish flashing.
14. Once it is done, select Go Back then Reboot System and wait for the phone to reboot.
15. Stop the Phone from Uninstalling the Custom Recovery Image
16. Once the phone is booted up, plug it in via USB cable and do NOT mount the storage.
17. Open a command prompt on the computer and type the following with hitting enter at the end of each line:
adb shell
cd etc
mount -o rw,remount /dev/block/mtdblock3 /system
mv install-recovery.sh install-recovery-no.sh.
18. Turn off the phone and turn it back on by holding down Volume Up and Power to get into fastboot mode.
19. Plug the phone in via USB cable while in fastboot mode and open the command prompt again and type the following with hitting enter at the end of each line:
cd c:\androidsdk\tools\
adb reboot bootloader
fastboot flash recovery recovery.img

Permarooted s-off still get no CWM recovery mode!?

I am rooted with s-off running on a ATT simcard but still can't boot in CWM recovery. In rom manager it says: current recovery Clockworkmode 3.0.2.4
Whenever I attempt to boot into recovery the MT4G comes up it reboots and it comes up agains and boots regularly. Any thoughts?
I followed all the instructions in this thread and am at the 85.xxx bootloader
http://forum.xda-developers.com/showthread.php?t=858996

I am bone stock other since I've not be able to get into recovery mode. Would a factory reset help?

Do it manually. Go to the bootloader and load recovery from there, or use adb and type adb reboot recovery.

adb does the same thing it attempts to get into recovery then goes blank and reboots regular and same thing with hboot.

Do you have fastboot on?

Nope. Fastboot is off. I can't even factory reset the phone. It just reboots like with everything else

be1ieve1111 said:
Nope. Fastboot is off. I can't even factory reset the phone. It just reboots like with everything else
Click to expand...
Click to collapse
most likely it feels as if the recovery image didn't take.
Code:
adb reboot bootloader
from there select "recovery" and see what boot loader you are using. If you have the engineering screen manually flash it.
http://www.koushikdutta.com/2010/02/clockwork-recovery-image.html
1. Download CWR3. - link supplied above
2. Save to your Android SDK tools (c:\android-sdk-windows\tools) or platform-tools (c:\android-sdk-windows\platform-tools) folder and rename to recovery.img
3. Turn off your phone.
4. Hold the volume down button + power until you boot to a white screen.
5. Use the volume rocker to select FASTBOOT then press the power button to select it.
6. Connect your phone.
7. Open up a windows command prompt and navigate to your sdk tools or platform tools folder. tools (c:\android-sdk-windows\tools) or platform-tools (c:\android-sdk-windows\platform-tools)
8. Type
Code:
FASTBOOT DEVICES
to make sure your computer "sees" your phone and is ready to flash the recovery. You should get a serial number and then the word fastboot as the output.
9. Type
Code:
fastboot flash recovery recovery.img
and press enter. Give it a minute to do it's thing. You should get a message that says writing recovery and success.
10. Unplug your phone and use the volume rocker to select BOOTLOADER and then again to select RECOVERY and you should be booted into the orange menu of Clockwork Recovery 3
Click to expand...
Click to collapse
taken and modified from http://forum.xda-developers.com/showthread.php?t=919834

It says fastboot isn't a recognized command when I type FASTBOOT DEVICES
also for the bootloader part. It loads real quick and it says something about no image or wrong image in the lines of code that loads on the screen then disappears

Are you using Linux? If so, cd to platform-tools and use ./fastboot instead of fastboot. Otherwise try updating adb and see if it works. Also, the random text is the phone searching for PD15IMG or another restore image. Disregard that, unless you want to flash the stock unrooted image.

[Q] stuck on recovery screen.

Hello,
I've rooted my device and installed the hellfire Kitkat rom. Since I was not fully satisfied I wanted to go back to stock rom and then install the latest update from LG.
But now the device only boots into recovery (CWM V6.0.4.7)
I can install a backup ROM but when I reboot it enters recovery again.
I tried entering download mode by pressing "volume UP key" and then plugin usb but it enters recovery again.
Can someone help me please?!

sander-w said:
Hello,
I've rooted my device and installed the hellfire Kitkat rom. Since I was not fully satisfied I wanted to go back to stock rom and then install the latest update from LG.
But now the device only boots into recovery (CWM V6.0.4.7)
I can install a backup ROM but when I reboot it enters recovery again.
I tried entering download mode by pressing "volume UP key" and then plugin usb but it enters recovery again.
Can someone help me please?!
Click to expand...
Click to collapse
I'm going to be cautious replying here because I'm a noob, but did you try using ADB to issue commands through adb sideload in cwm? If you go to "load zip" (or something along those lines) then "load using adb" (or something similar) in CWM, you can use adb to issue these commands with your computer and it should fix it (at least, it fixed a boot loop for me when I was stuck with TWRP). Here's the link:
http://forum.xda-developers.com/showthread.php?t=2451696

First of all. DON'T PANIC!
And even before that - make a nandroid backup! Go in CWM and make a full backup.
You have recovery working so you should be able to load System on it ok.
I am not an expert but let me try to guide you step by step.
1. Make a backup!
2. Download a rom on your computer. MAKE SURE ITS FOR YOUR MODEL # of LG G2
List of roms here:
3. Make sure you have over 70% battery
4. Go into recovery CWM
5. Use Wipe > Swipe to Factory Wipe
(go back on bottom right corner)
6. Go Advanced from HOME screen of CWM
7. Click ADB sideload
7b. (I assume you have the drivers loaded. If not make sure ADB is loaded in windows and device manager shows it. Download basic ADB package so you have "adb.exe" file in it)
8. put your rom in the same folder where you have "Adb.exe"
9. Open command prompt on windows. Goto the folder where ADB.exe is. Then Type "adb push (filename) /sdcard/(filename)". Example, "adb push rom.zip /sdcard/rom.zip"
10. Wait until it finishes its transfer(a message will appear saying the filename, file size and the speed of the transfer per sec when it finishes)
11. Wait for a while or reboot your cwm so that the filename will appear
12. just reflash the file in CWM (Install > choose file). Wipe after again.
13. Voila!

By any chance did you successfully go back to stock 4.2.2 and then took the OTA and then got the recovery loop? If so this will help http://forum.xda-developers.com/showthread.php?t=2451696

Drachenminister said:
By any chance did you successfully go back to stock 4.2.2 and then took the OTA and then got the recovery loop? If so this will help http://forum.xda-developers.com/showthread.php?t=2451696
Click to expand...
Click to collapse
I did manage to restore the backup rom of 4.2.2 Then I downloaded the 4.4 OTA update and installed it. Then it hangs in recovery.
Do I need to have TWRP installed or does this work with CWM too?!

sander-w said:
I did manage to restore the backup rom of 4.2.2 Then I downloaded the 4.4 OTA update and installed it. Then it hangs in recovery.
Do I need to have TWRP installed or does this work with CWM too?!
Click to expand...
Click to collapse
Basically what you need is a root shell whether it's via adb or built into recovery (cwm or twrp)
Searching the forum for "cwm bootloop ota" might give you detailed instructions for your case

Drachenminister said:
By any chance did you successfully go back to stock 4.2.2 and then took the OTA and then got the recovery loop? If so this will help http://forum.xda-developers.com/showthread.php?t=2451696
Click to expand...
Click to collapse
When I try to run "adb shell" I get a message "error: closed" what does it mean?
When I run adb devices it returns a serial number. so it looks like it is able to communicate with my g2.

sander-w said:
When I try to run "adb shell" I get a message "error: closed" what does it mean?
When I run adb devices it returns a serial number. so it looks like it is able to communicate with my g2.
Click to expand...
Click to collapse
Weird, you can try and add the commands directly enclosed in parentheses like adb shell "dd if=...."

Drachenminister said:
Weird, you can try and add the commands directly enclosed in parentheses like adb shell "dd if=...."
Click to expand...
Click to collapse
It seems that my device was in sideload mode. when I disabled sideload mode I followed the instructions on this pag
http://forum.xda-developers.com/showthread.php?t=2451696
And it worked!!!
Thanks for your help all!!!!

[Q] N4 stuck in boot loop after OTA update

Hello,
I saw that the OTA update to Lollipop was available on my phone today, so I went ahead and let it download. Upon completion of the download, it restarted and applied patches, then restarted again and has been stuck in boot loop for about an hour. After reading several other threads on how to try to reset the phone, I'm stuck. When I try power + volume up or down, the LED status indicator flashes red and I never get to any kind of other screen. Am I completely screwed? I previously had stock 4.4.2 with no modifications.

Finally was able to get to the bootloader menu. Apparently having the phone plugged into the charger was preventing me from getting there for some reason. I ended up having to wipe the phone to get it to boot

so you can get into clock recovery right? download nexus 4 toolkit..that might save your phone. I suggest you to unroot and flash everything to stock and then unlock again and start everything from scratch. good luck.

Similar issue on an OTA upgrade to an unrooted N4. It's stuck on the Lollipol boot screen with the rotating Circle thingies.
I can get to the Android System Recovery but there's no CWM or TWRP on my N4. I'm guessing a factory reset will fix it but is there a way to preserve my pics/files on the phone before doing so?

Sportfreunde said:
Similar issue on an OTA upgrade to an unrooted N4. It's stuck on the Lollipol boot screen with the rotating Circle thingies.
I can get to the Android System Recovery but there's no CWM or TWRP on my N4. I'm guessing a factory reset will fix it but is there a way to preserve my pics/files on the phone before doing so?
Click to expand...
Click to collapse
I guess TWRP Recovery has option to enable MTP and you can access the internal SD card by connecting mobile with computer using usb cable.
---------- Post added at 06:37 PM ---------- Previous post was at 05:37 PM ----------
Sportfreunde said:
Similar issue on an OTA upgrade to an unrooted N4. It's stuck on the Lollipol boot screen with the rotating Circle thingies.
I can get to the Android System Recovery but there's no CWM or TWRP on my N4. I'm guessing a factory reset will fix it but is there a way to preserve my pics/files on the phone before doing so?
Click to expand...
Click to collapse
Flash TWRP Recovery using fastboot.
1. If you have otg y cable, connect it and use file manager to copy all the files.
2. OTG method is failed then select “Mount”, then select only “Data” and connect your Nexus 4 to your computer and Enable MTP in TWRP. now you can use adb pull and push commands.

I ended up going the factory reset route, which wasn't really a bad thing. My photos had been backed up in dropbox and the play store remembered all the apps and were able to reload them. The only things I really had to do was reload some music onto the phone and re-enter passwords for apps.

Same story here: sideloaded the OTA zip file, then had bootloop. Tried a few approaches, but none worked. In the end only wiping the data was the solution for me. Lost some userdata in a few important Apps...

I went through this yesterday. The only way to get it to boot is a Factory Reset from Recovery. It works like magic, but sucks you lose the data.

Got the OTA yesterday and also got a bootloop(stuck in boot screen animation). I couldnt afford losing my photos/videos as i had no backup , so i figured out a super easy to get it to boot without wiping data .
I was unrooted with stock recovery running stock 4.4.2, bootloader was unlocked. I flashed CWM recovery through fastboot and wiped chache+ Dalvik from there then simply rebooted the phone .
I had already tried wiping cache from the stock Android recovery,needless to say that didnt work for me.
If anyone else is having the same problem please try the method above and report back, cheers!

I post this on Google Product Forum 2 days ago. Hope it helps
https://productforums.google.com/for...Q/wDzRUm4b2UsJ
(updated 29/11/2014)[not perfect but it is a SOLUTION]
The idea of this is to downgrade your nexus 4 without wiping your data, which means stuff you will need includes:
1. adb and fastboot on your computer (I am using mac but you can find it on windows as well. There are tones of website and forums telling you the latest method of getting it onto your computer)
2. factory image of nexus 4(I use 4.4.4, since that's what it was. I don't have the time and energy to try to do the same thing with lollipop. you can try can leave a comment).
update: do NOT try to flash 5.0 rom using this method. You will be stuck at boot loop again
3. usb cable
4. nexus 4 with unlocked bootloader(the process of unlocking bootloader will wipe your device)
5. computer
steps
1. unzip the factory image (something.tgz)
2. for me, after unzipping the .tgz, I still find another .zip inside. unzip that too.
3. hold vol+, vol-, and power button simultaneously to enter fastboot mode
4. open terminal(mac)(it would probably be cmd for windows)
5. connect your nexus 4(in fastboot)
6. to make sure it connect successfully, type "fastboot devices". if something like "005040c0d54bb291 fastboot" appears, you are good. Otherwise, try reconnect your device/boot to fastboot again/use another usb cable
7.now we need to tell the terminal to navigate to the location of the unzipped factory image. to do that, i suggest you put the unzipped folder to somewhere easy to find, like desktop. these are some commands to help you navigate:
"ls" allows you to look at whats inside the current directory of the terminal. For example, this is the output after typing "ls" for me:
some folder Photos
nexus4image.tgz how many folders do you have
5.zip occam-ktu84p
more folder occam-ktu84p.zip
after knowing where you are, use "cd" (below) to go to your folder
"cd" means change directory. For example. "cd Photos" will brings me to the "Photos" folder. And then if I type ls, I will see a whole bunch of photos in my photos. If you go to the wrong folder, type "cd ..", and it will bring you back to the previous folder.
8. flash bootloader.
enter the following command, BUT REMEMBER TO CHANGE THE NAME TO FIT YOURS(DIFFERENT VERSIONS HAVE SLIGHTLY DIFFERENT FILE NAME AT THE END(type ls first to help you type the correct name)
fastboot flash bootloader bootloader-mako-makoz30d.img
9. reboot bootloader. just copy and paste
fastboot reboot-bootloader
10. flash radio
enter the following command, BUT REMEMBER TO CHANGE THE NAME TO FIT YOURS(DIFFERENT VERSIONS HAVE SLIGHTLY DIFFERENT FILE NAME AT THE END(type ls first to help you type the correct name)
fastboot flash radio radio-mako-m9615a-cefwmazm-2.0.1701.03.img
11. reboot bootloader. just copy and paste
fastboot reboot-bootloader
12. flash system
system.img is located inside the zip, use ls to help you navigate. This steps takes the longest time, total time on this step is 87 seconds while the others are less then 1 second
fastboot flash system system.img
13. flash boot
boot.img is located inside the zip, use ls to help you navigate.
fastboot flash boot boot.img
14. flash recovery
fastboot.img is located inside the zip, use ls to help you navigate.
fastboot flash recovery recovery.img
15. format cache(not the memory, so everything should be fine)
fastboot format cache
16. reboot and wait
this will reboot your device. You probably have to wait for a while to initialise all the apps. after than you are good to go!
fastboot reboot
credit: my friend for giving me this idea + http://forum.xda-developers.com/nexu...image-t2010312 + HelpMyNexus

And now what i do with my Axon 7?

Hello everyone. Meanwhile you excuse me for imperfect English but I use translator, my English language is rusted...
I have a A2017G, I have managed to unlock the bootloader, install TWRP and SuperSu on 6.0.1 version But then I have had the nice idea to update to 7.1.1 then have put update. zip file (renamed), in SD card, turn off the terminal, enter into TWRP but it Disappear!!! Only Originale...io recovery make flash and device updated to B09.
I want to install TWRP and SuperSu and put alternative ROMs but I can't do anything! If I open PowerShell window in adb folder and command "ADB reboot bootloader", the device reboot and appear a screen where to " your devices software can't be checked for corruption, please lock the bootloader", ecc ecc, If I squeeze volume on, it will get into recovery, if I don't do anything it reboot normally.
I can not get into fastboot mode, I fail to install TWRP. What is the best way to go back? or reset everything and start again? I have tried to downgrade from Nougat to MM via SD but after about 1 minute of analysis I aborted the installation....
However the phone will work normally even without all these things but I have purchased ZTE for modding and I don't bear to have half fatto...in work the most difficult thing to be unlocking the bootloader and I do this thing...

Let me link you my ingenious, allmighty Axon 7 Companion Thread.

Try to install twrp with MiFlash if you can enter edl mode

macerf said:
Hello everyone. Meanwhile you excuse me for imperfect English but I use translator, my English language is rusted...
I have a A2017G, I have managed to unlock the bootloader, install TWRP and SuperSu on 6.0.1 version But then I have had the nice idea to update to 7.1.1 then have put update. zip file (renamed), in SD card, turn off the terminal, enter into TWRP but it Disappear!!! Only Originale...io recovery make flash and device updated to B09.
I want to install TWRP and SuperSu and put alternative ROMs but I can't do anything! If I open PowerShell window in adb folder and command "ADB reboot bootloader", the device reboot and appear a screen where to " your devices software can't be checked for corruption, please lock the bootloader", ecc ecc, If I squeeze volume on, it will get into recovery, if I don't do anything it reboot normally.
I can not get into fastboot mode, I fail to install TWRP. What is the best way to go back? or reset everything and start again? I have tried to downgrade from Nougat to MM via SD but after about 1 minute of analysis I aborted the installation....
However the phone will work normally even without all these things but I have purchased ZTE for modding and I don't bear to have half fatto...in work the most difficult thing to be unlocking the bootloader and I do this thing...
Click to expand...
Click to collapse
Your phone works normally
You don't have fastboot
You have stock recovery
If this is the case then most surely you have EDL working...
Install TWRP from EDL mode:
This is taken from Controllerboy's guide
BE SURE THAT WINDOWS SHOWS FILE NAME EXTENSIONS!
A) Flashing TWRP Recovery to your device.
Q: Why do I need TWRP?
A: TWRP is a custom recovery system. It lets your backup your system in case anything goes wrong. It also lets you flash custom ROMs and zip files containing patches like viper4android or A.R.I.S.E. (audio) and root your device via SuperSU.
0) Boot up a windows computer with a 64bits processor. Verify your Axon 7 is charged at least 75%. Temporarily disable your antivirus software to allow axon7tool to work.
1) Backup all the data of your phone's internal memory that you don't want to lose. Copy it to your PC
2) Download the axon7tool from here: http://www.filedropper.com/axon7tool-15-win64
3) Download minimal adb and fastboot from here: https://www.androidfilehost.com/?fid=457095661767103465
4) Unzip the minimal adb and fastboot file, place the folder with the files in it somewhere you can easily find it
5) Place the axon7tool exe in the same folder as adb.exe and rename it to "axon7tool.exe" (it's easier to work with that way)
6) Download the TWRP .img and .bin files from here: https://drive.google.com/open?id=0B4...nlaZU1NRldoRjA
7) Place the TWRP .img file in the same folder as "adb.exe" and "axon7tool.exe", rename it to "recovery.img"
8) Make a copy of the "recovery.img" file and name it "recovery.bin". Leave it in the same folder
9) Go to settings in your phone and go to "About Phone". Tap "Build Number" 7 times to make the Developer Options available
10) Go to "Developers options" and tick "Allow OEM unlock" and "Android Debugging"
11) Connect your Axon 7 to your PC
12) Open a command window by holding shift and right-clicking in a blank space in the folder where the "adb.exe", " axon7tool.exe", "recovery.img" and "recovery.bin" files are located. Click "Open command window here"
13) Type "adb devices" and hit enter. You should see one device with some code listed
14) Type "adb reboot edl" and hit enter. Your device will reboot to EDL mode. It appears to be off, but it is in fact in EDL mode.
15) Go to Device Manager on your pc and verify your Axon 7 is listed as "QUSB_BULK"
16) In command, type "axon7tool -r gpt boot recovery" and hit enter
17) After it is executed, your phone will reboot. Wait until it has fully booted.
18) In command, type "adb reboot edl"
19) Verify you now have 3 backup files in your ADB folder for gpt, recovery and boot. These are backup files in case something goes wrong
20) In command, type "axon7tool -w recovery"
21) Wait until it finishes
22) Your phone should reboot
23) Shut down your phone and boot it to TWRP by holding both the power and volume up button to verify you have TWRP
24) TWRP might ask you for a password. If it does, simply tap cancel. It will ask you if you want to modify system. Swipe to agree
NOTE: if you have problems connecting to your phone as QUSB_BULK, download Zadig and replace your drivers with WinUSB ones. If axon7tool doesn't recignise your device even when connected as QUSB_BULK, try killing adb.exe via task manager before retrying.

Hello and thanks for the guide.
I have tried this system... be gone everything OK up to number 16... when I type "Axon7tool -r gpt boot recovery ", the command window should be written "Failed to connect "... and yet the device is in EDL mode.
Be all right, on Device Manager be seen as "QUSB_BULK ", the cable being original, all steps 1 to 16 be ok...io no longer know what to do.

macerf said:
Hello and thanks for the guide.
I have tried this system... be gone everything OK up to number 16... when I type "Axon7tool -r gpt boot recovery ", the command window should be written "Failed to connect "... and yet the device is in EDL mode.
Be all right, on Device Manager be seen as "QUSB_BULK ", the cable being original, all steps 1 to 16 be ok...io no longer know what to do.
Click to expand...
Click to collapse
Easy. Hold all 3 keys (power, vol up and down) until Device Manager refreshes (you'll see it as the list of devices contracting), and close CMD. Open it again and do step 16 again

Choose an username... said:
Easy. Hold all 3 keys (power, vol up and down) until Device Manager refreshes (you'll see it as the list of devices contracting), and close CMD. Open it again and do step 16 again
Click to expand...
Click to collapse
Hello and thanks for the advice. Unfortunately it does not change anything.. I have done exactly as you say but the result does not change anything...io have connected the device, Open command window, type "adb devices ", is viewed as "Cd07b2e9 device ", I type "adb reboot EDL ", it restarts in EDL, then go to management Devices and is viewed as "QUSB_BULK ", Run command "Axon7tool-r GPT boot recovery " but it says "Failed to connect ", then I'll return to Device Manager, hold volume up & Down & Power, Icon disappears and returns after a few seconds, close window and launch command "Axon7tool-r GPT boot recovery " but still give "failed to connect "...
So, recapping: I have bootloader unlocked, I can get into EDL but PC does not see device although on Device Manager it exists...
I now launch device into the wall... problem solved.

if you really slammed it against the wall, i would love to buy the back housing and speaker grills. hopefully, you were just illustrating frustration (it is a frustrating scenario), and will reach a resolution, but if you actually did smash it, i could use some parts.

kitcostantino said:
if you really slammed it against the wall, i would love to buy the back housing and speaker grills. hopefully, you were just illustrating frustration (it is a frustrating scenario), and will reach a resolution, but if you actually did smash it, i could use some parts.
Click to expand...
Click to collapse
Of course I'm kidding... have just purchased this device, have a great hardware but the software does not go well for nothing. I have had a dozen phones, I changed about 60 ROMs, so for me it is not difficult to change the software...ma in this case have problems. Is it possible that I fail to solve this problem? Be a way to reset everything and start from scratch? Okay, the bootloader be unlocked but not be any other way to go back? I have seen many guides but not able to solve the problem. I fail to make flash of TWRP, fail to do downgrade to MM....io hope someone help me... thanks.

are you using a USB 2.0 or 3.0 port? it may not apply to this scenario, but with Motorola and RSD Lite, I always had to use usb 2.0 ports or it wouldnt see my device when flashing.
also, the steps @choose an username listed out are the best way to start from scratch, but obviously you have to be able to have your computer see the phone in the desired mode.
@DrakenFX has several guides in the axon 7 forums that should help once the computer sees the phone as well.

I use USB 3.0 with original cable ... but if you now tell me that maybe this is my problem, then I use USB 2.0. Thank you...

Good morning...
Nothing to do... I put the original cable on USB Port 2.0, have redone procedure from window PowerShell, on command "adb devices " Everything OK, on command "adb reboot EDL " It enters EDL mode, but then all the procedures are failed... if command "Axon7tool-R recovery GPT boot "I always get out of the inscription " Failed to connect ", it remains in EDL and I just have to reboot... I replaced the drivers with Zadig 2.3 but did not change anything... are there any other moors to make flash of TWRP? exist lthough an app that do this? I remember that for LG G3 I'll fix everything with an app...