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Cannot enter in recovery mode after Asus Zenpad 10 Z300 entered in boot loop...help.

Hello members,
I have an old Asus Zenpad 10 Z300C that entered in a boot loop a few days ago.
I'm trying to boot in recovery mode so I can do a factory reset on it but I can't...
The procedures should be like these:
1. Power off your phone.
2. Once the device is off, press and hold the Volume Down + Power button together for a few seconds.
3. Release the keys as soon as you see the Asus logo and wait for few seconds.
4. Now, your phone should boot into Recovery Mode.
The only I can do is to boot in fastboot mode by pressing Volume Up + Power button.
Can anyone give me some tip about what could be the problem?
Thanks in advance.
Cheers!

kelsinni said:
Hello members,
I have an old Asus Zenpad 10 Z300C that entered in a boot loop a few days ago.
I'm trying to boot in recovery mode so I can do a factory reset on it but I can't...
The procedures should be like these:
1. Power off your phone.
2. Once the device is off, press and hold the Volume Down + Power button together for a few seconds.
3. Release the keys as soon as you see the Asus logo and wait for few seconds.
4. Now, your phone should boot into Recovery Mode.
The only I can do is to boot in fastboot mode by pressing Volume Up + Power button.
Can anyone give me some tip about what could be the problem?
Thanks in advance.
Cheers!
Click to expand...
Click to collapse
Hi, i have just Root m'y Asus z300 and saw this thread with fastboot recovery : https://forum.xda-developers.com/zenpad-10/help/how-to-root-asus-zenpad-10-z300c-t3214802/page15
Perhaps should help you...
Good Luck.
Btf

billythefly said:
Hi, i have just Root m'y Asus z300 and saw this thread with fastboot recovery : https://forum.xda-developers.com/zenpad-10/help/how-to-root-asus-zenpad-10-z300c-t3214802/page15
Perhaps should help you...
Good Luck.
Btf
Click to expand...
Click to collapse
Hi billytheply, thanks for your reply.
You mean follow all the steps mentioned on page 15 posted by @tassos_chry?
Thanks again

kelsinni said:
Hi billytheply, thanks for your reply.
You mean follow all the steps mentioned on page 15 posted by @tassos_chry?
Thanks again
Click to expand...
Click to collapse
Hi,
I mean there are perhaps something you can try on these thread. Read all the thread and check if someone succeed.
I do not have try to unbrick my z300. So i cannot Say if something Work.
Good Luck
Btf

billythefly said:
Hi,
I mean there are perhaps something you can try on these thread. Read all the thread and check if someone succeed.
I do not have try to unbrick my z300. So i cannot Say if something Work.
Good Luck
Btf
Click to expand...
Click to collapse
I have already read. Despite all my tries to enter in recovery mode on the tablet, I just can enter in fastboot mode by pressing Vol up + Power buttons
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
But the problem is that after i have installed adb+fastboot in my PC, i cannot found my tablet when i type the command "fastboot devices"
I have also tried to install "intel flash tool" (because this model has an atom cpu) and tried to flash the costom ROM for this model but then i get an error when the software was trying to get the serial number of the tablet...
Does anyone knows what can be the problem?
Thanks again

kelsinni said:
I have already read. Despite all my tries to enter in recovery mode on the tablet, I just can enter in fastboot mode by pressing Vol up + Power buttons
But the problem is that after i have installed adb+fastboot in my PC, i cannot found my tablet when i type the command "fastboot devices"
I have also tried to install "intel flash tool" (because this model has an atom cpu) and tried to flash the costom ROM for this model but then i get an error when the software was trying to get the serial number of the tablet...
Does anyone knows what can be the problem?
Thanks again
Click to expand...
Click to collapse
Hi, i don't succeed at the first try to install adb driver manually.
You must find Asus adb driver in the thread and force manual instal ( manually update adb in Windows paramèters or desinstall et manually install).
I succeed with fastboot command After install manually the specific Asus driver.
I tried Many times before and think it was not possible.
Btf

Snapdragon S20 G9810 - No Download mode, but Fastboot instead?!

Hi,
This morning I wanted to factory reset the phone and flash the latest version, but to my surprise I do not have the Download mode anymore, but I have the standard fastboot screen, wtf ?
EDIT : using "adb reboot download" worked. "adb reboot bootloader" goes fastboot and "adb reboot fastboot" goes into a reboot.
{
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"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

this is normal now.. s20 devices have dynamic partitions so they implemented fastboot for using gsi n such

elliwigy said:
this is normal now.. s20 devices have dynamic partitions so they implemented fastboot for using gsi n such
Click to expand...
Click to collapse
It all changed during an update tbh. One day I could adb reboot bootloader, and land on the download mode, and now I just get fastboot.

Paradoxxx said:
It all changed during an update tbh. One day I could adb reboot bootloader, and land on the download mode, and now I just get fastboot.
Click to expand...
Click to collapse
what firmware are you on exactly?

I have a similar issue.. i get stuck at Entering Fastboot mode. After updating to latest firmware ATG4 from Australia via ODIN. Phone CSC is from Panama. I can boot to system just fine but not Download mode.

fourqui said:
I have a similar issue.. i get stuck at Entering Fastboot mode. After updating to latest firmware ATG4 from Australia via ODIN. Phone CSC is from Panama. I can boot to system just fine but not Download mode.
Click to expand...
Click to collapse
Power the phone off then with the cable plugged into the phone, keep volume button pressed and plug the other end of the cable into PC or Laptop.

west2cool said:
Power the phone off then with the cable plugged into the phone, keep volume button pressed and plug the other end of the cable into PC or Laptop.
Click to expand...
Click to collapse
Tried all key combinations. still no luck.

fourqui said:
Tried all key combinations. still no luck.
Click to expand...
Click to collapse
Mate clearly you not doing it properly. Ensure you phone is powered off then plug the USB-C into to it. Next, with the volume button depressed plug the said other end of the cable into a laptop/PC. The phone should then power up with a blue screen, press the volume up.

west2cool said:
Mate clearly you not doing it properly. Ensure you phone is powered off then plug the USB-C into to it. Next, with the volume button depressed plug the said other end of the cable into a laptop/PC. The phone should then power up with a blue screen, press the volume up.
Click to expand...
Click to collapse
Ok I got it working.. I think what you meant to say was Ensure you phone is powered off then plug the USB-C into to it. Next, with the volume UP and DOWN buttons pressed, plug the said other end of the cable into a laptop/PC. The phone should then power up with a blue screen, press the volume up

elliwigy said:
what firmware are you on exactly?
Click to expand...
Click to collapse
ATFD with ATFF baseband right now. I had whatever previous version it was before.

Axon 7 only boots to ZTE logo

I wanted to install a custom ROM, resurrection remix.
[ROM][9.0.0_r46][A2017X][OFFICIAL] Resurrection Remix 7.0.2
/* * 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...
forum.xda-developers.com
I gathered a whole bunch of information on this and decided first I needed to unlock the boot loader, maybe get fast-boot to work? (which is removed?) and install a custom recovery first. For this I was using the Axon7Toolkit-v1.2.1.
Thing is I tried to flash the recovery with the Axon7Tool and now I am stuck on this green ZTE logo loading screen, the device is already formatted.
https://github.com/bennykor/Axon7Toolkit/releases
I have previously installed ROM's on other phone's but not sure what is going on with this one?
I can't really seem to get it to boot up into anything else or connect it to ADB to see what is going on and it is also not detected anymore by the tool. Not much of what I have previously done seems to work on this thing...

Can you get into the bootloader?
Turn phone off, hold 'vol +' and 'vol -' and 'power' buttons, once phone turns on release 'power' button.

shpitz461 said:
Can you get into the bootloader?
Turn phone off, hold 'vol +' and 'vol -' and 'power' buttons, once phone turns on release 'power' button.
Click to expand...
Click to collapse
Hey yeah that did work actually, althought when I selected the recovery mode option it restarted to the logo again and I have to wait until the battery drains now because I can't seem to turn it off.
EDIT - Doesn't seem to detect it in adb though, not sure where to go from here.

oops -delete-?

Bootloader/download modes are not related to adb, you need to use 'fastboot' tool instead of 'adb' tool.
Did you try to boot into bootloader and then run an RUU from a pc while the phone is connected via cable?

shpitz461 said:
Bootloader/download modes are not related to adb, you need to use 'fastboot' tool instead of 'adb' tool.
Did you try to boot into bootloader and then run an RUU from a pc while the phone is connected via cable?
Click to expand...
Click to collapse
Ah I didn't realize this. I am trying to flash with fastboot now but I get an error and also with the axon7tool (on github) I get this error:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Thing is I read use fasboot clear cache but this also yields the same error.

fastboot doesn't work in bootloader for flashing, you need to boot into download mode and then use fastboot commands to flash partitions.
Flashing usually fails the 1st time so just run the same command again and it will go through (it prompts you that on the screen).

shpitz461 said:
fastboot doesn't work in bootloader for flashing, you need to boot into download mode and then use fastboot commands to flash partitions.
Flashing usually fails the 1st time so just run the same command again and it will go through (it prompts you that on the screen).
Click to expand...
Click to collapse
Ok but but the only two options I appear to have left here is to hold "volume up/down power" for fastboot mode or go into FFBM mode? (Also gives some message about devices cannot be checked for corruption when bootloader is not unlocked)
Do i need to go into download mode from android?
Download Mode ZTE Axon, how to - HardReset.info
The whole list of secret codes for your device. Check out how to get access to hidden mode, advanced features and secret options.
www.hardreset.info
Because I doesn't appear to be working for me with this button combination.

So I can't really get any of this fastboot flashing to work it keeps either giving the error "To many links" or "FAILED (Write to device failed (Unknown error))" ?
Fixed here: https://android.stackexchange.com/q...e-failed-no-link-unknown-error-too-many-links

EDL Mode HD1925

So, I'm trying to use the MSM Tool trick to oem unlock my phone from another thread, and I can't seem to keep my phone in EDL Mode. I have the Qualcomm drivers properly installed--when I get it to go into EDL mode, my device manager properly recognizes it as "Qualcomm HS-USB QDLoader 9008," but it only seems to want to stay in EDL mode for a few seconds, then it boots back up. I've tried doing this through adb and by holding volume + and - and plugging in the cord--both methods, same result. Anyone have any suggestions? I greatly appreciate your feedback!

I always power off my phone. Then hold both volume buttons down and plug it in. MSM tool sees my phone and hit start.

which Qualcomm drivers you installed ? because my phone is not connecting with MSM tools ....

I'm having the same issues. Anyone find a fix?

Charles: said:
I'm having the same issues. Anyone find a fix?
Click to expand...
Click to collapse
I installed twrp recovery software to go into EDL mode after that all works fine and connected

Zain ul Abedin said:
I installed twrp recovery software to go into EDL mode after that all works fine and connected
Click to expand...
Click to collapse
Which TWRP?? Did you load it via Fastboot and use Fastboot commands? Are you A11? Which Qualcomm drivers?

I basically forget that , but search about it . And install TWRP in your phone

otoyayamaguchi said:
So, I'm trying to use the MSM Tool trick to oem unlock my phone from another thread, and I can't seem to keep my phone in EDL Mode. I have the Qualcomm drivers properly installed--when I get it to go into EDL mode, my device manager properly recognizes it as "Qualcomm HS-USB QDLoader 9008," but it only seems to want to stay in EDL mode for a few seconds, then it boots back up. I've tried doing this through adb and by holding volume + and - and plugging in the cord--both methods, same result. Anyone have any suggestions? I greatly appreciate your feedback!
Click to expand...
Click to collapse
I think it's supposed to only last for a few seconds. Pull up the MSM Tool and pay attention to the "Status of Connection" field for any of the COM lines in the MSM Tool. When you connect, it should say "Connected" for one of those lines. If that happens at all, then you're good to proceed. Make sure you have TMO selected in the drop-down, click "Enum" once you plug in your device, then click Start. Try to do this quickly. Let me know if this helps.

I am having the same problem with my 7T Pro McLaren, the pc recognizes it but msm tool does not, someone has already found the way
{
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"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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"lightbox_full_screen": "Full screen",
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I had the same issue. One easy fix is switching from a USB 3.0 port to USB 2.0 port. The other method that worked for me is a little more of a process.
1) Have MSM open
2) Connect phone to PC
3) Power phone off
4) Then, the moment it powers down, hold the vol +, -, & power button
5) Keep holding it. Your PC will make a sound notifying you that it's detected the phone, but you want to keep
holding the buttons until you hear it being detected for the second time.
6) Release buttons.
Hopefully that makes it stay in EDL mode for you.

I wrote on this somewhere, but you can try having the program open and placed at the right settings, then move quickly once the phone is in EDL mode. Not ideal but worked for me. Once the process begins it won't exit out of EDL mode in my experience.

hii, from most tutorial i have seen so far, the com number is show in the msm tool upon starting the program, most the two msm tools i have tried so far dont show com number... and its not detecting my phone.

Can't talk to Blade A3 in Fastboot mode / how to query "device tampered"?

Hello, I have moderate experience as an Android developer but I don't know much about ZTE or custom ROMs.
Today my cell phone died and for a temporary replacement I walked into an iffy local cell repair store and asked them for the cheapest Android phone they had. They gave me a preowned Z3352CA which I think is a "ZTE Blade A3 L". It is running Android 9 Build number Z3352CAV1.0.B03 ("Android Go"). It's pretty nice. However I have a sense buying a preowned Android is probably about as safe as sticking your hand in a garbage disposal. I did a factory reset first thing, but I would like to be reasonably certain the thing the factory reset installed was a legitimate ZTE OS with no extra presents from the previous owner like spyware*.
I found an iffy article describing Blade bootloader unlock procedures, with this screenshot:
View attachment 5418861
"Device tampered" caught my eye. Some discussions I see online about fastboot reference this "device tampered" flag. I am interested in this. If I had to guess, I'd guess this flag is supposed to go true if the device is unlocked and stay true even if the device is re-locked. I would like to check this flag. (To be clear, right now I *don't want* the bootloader unlocked. What I want is to be sure nobody before me has ever unlocked the bootloader.)
From here I attempted to put the phone into Fastboot Mode. I can't tell if this worked or not.
I started up with the "volume up" and power buttons held, which dropped me into "Recovery Mode". It said "Android Recovery" at the top and offered a menu of options, one was "Reboot to Bootloader". I selected this and was sent to a black screen with "=> FASTBOOT mode..." in the bottom left corner in a terminal font. Nothing happens at this screen. The up and down volume buttons, and the power button, do nothing (I can boot the phone normally by holding the power button down 3 seconds). I can't tell if this is fastboot mode or not. If I run fastboot.exe devices on my Windows 10 machine, it is not able to see or connect to the phone in "=> FASTBOOT mode..." mode. (I have the normal Windows Android drivers installed for running adb but have not installed the ZTE specific drivers.)
I dropped the phone into Developer Mode and looked in Developer Options. I saw an "OEM unlocking" checkbox, which is unchecked. I thought: Maybe this will let me talk to fastboot. But if I tap it, it says:
Allow OEM unlocking?
Warning: Device protection features will not work on this device while this setting is turned on.​
I tapped "cancel" because at this point it occurred to me this switch, by itself, might qualify as "tampering".
(Other things I tried: I ran the app "SafetyNet Test" from Google Play and it said I passed. I enabled USB debugging and was able to connect to the device with adb. I tried "adb.exe reboot bootloader" but it just took me back to the "=> FASTBOOT mode..." screen. I looked on the Android Developer website for documentation of "fastboot oem device-info" but couldn't find anything.)
What I am trying to figure out:
What should I expect the "Device tampered" key in fastboot oem device-info to mean?
Can either fastboot.exe or adb.exe tell me whether the device has ever been bootloader unlocked?
What will checking "Allow OEM unlocking" in Developer Options do? Will it allow me to talk to Fastboot? Will it result in the phone being flagged as "tampered'?
Is there anything I can do, with the tools available to me (ADB, and fastboot if I can make it work) to ensure there is no additional malware and I am running an ordinary stock ZTE OS?
* I am also interested in any info as to the probability ZTE itself or the ZTE default ROM is spyware-ing me.

The screenshot disappeared It was this
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"lightbox_toggle_sidebar": "Toggle sidebar"
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