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[Q] Trying to root, cant get into download mode

Im following this here:
http://www.techzek.com/how-to-root-samsung-galaxy-s-blaze-4g-sgh-t769-smartphone/
But the power, vol up and down get it to show the yellow "warning" thing that im supposed to see, but it goes away after like half a second so I cant get into it. What else can I do?

how to get to download mode.
As you press the volume +/- and power button , simultaneously plug the micro usb cable into your phone (this cable should already be attached to your pc). This should do the trick.
Happy rooting.

The instructions in the first post are wrong, and should be updated. You have to have the cable plugged in. In the video for example, he has the phone plugged in the entire time. You're not required to have three hands in order to get it done.

I've had no luck with any of the variations on this method either.

Turn your phone off, hold both volume buttons and with your usb plugged into the computer take the other end and plug it into your phone while continuously holding the volume buttons. It will boot into the caution screen and than you press up to get into download mode.
Sent from my SGH-T769 using XDA Premium App

If none of the above still don't work try this
1. Turn off phone
2. Remove battery
3. Remove sim card
4. Remove SD card
5. Plug in USB from computer
6. Hold volume up + volume down
7. While still holding the volumes insert battery
8. Should now be in download mode
Sent from my SGH-T769 using xda premium

Thank you both for the replies. I've tried both methods several times without success. I'm tired now so I'll quit for the night. I'll try again tomorrow a few more times. If I can't get it to work I'll take it as a sign that I'm not meant to root this phone. I must have tried 30 times today; it gets old.

Update:
I've tried this ten or fifteen more times. I'm finding that the yellow warning message, whatever it is, doesn't appear at all, ever, unless the USB cable is not connected when I put the battery in. If the USB is connected, I get the gray battery icon every time, no matter what else I do.
If I do connect the USB, with the battery out, I immediately feel the device vibrating every second or so, as if reboooting.
I tried removing the SIM and SD cards again. This had no effect.
It's very strange. In that video the entire process looks about as easy as doing a simple battery pull. It's just not working for me. Is it possible that Samsung made some of these phones "root-proof"?

Worst case scenario you will have to buy a Samsung jig.
Sent from my SGH-T769 using XDA Premium App

I had to do it a few times myself.... It did not catch for me the first 3-4 times...
Then it worked. Make sure you are holding down all 3 buttons down tight.

amberSamsung said:
I had to do it a few times myself.... It did not catch for me the first 3-4 times...
Then it worked. Make sure you are holding down all 3 buttons down tight.
Click to expand...
Click to collapse
I think I've tried it at least 50 times now, with variations, and it's just not happening. I freely admit my ineptness, but holding down buttons is something even I can manage.
By "three buttons", I take it you mean two. I don't have separate volume up/down buttons on my Blaze; just a single rocker button. That's what you mean, right?
I did get as far as the warning screen, but from that screen there is no option for pressing up to go into download mode, so it seems that my warning screen is different from others'.
I guess the next thing is to research "Samsung jig" and figure out whether this is something I can possibly do.

I went through the same thing, I too thought I had to purchase a jig but the method I posted thanks to another member saved me, try again with a modification to step 6
1. Turn off phone
2. Remove battery
3. Remove sim card
4. Remove SD card
5. Plug in USB from computer
6. Hold volume up + volume down + power buttons
7. While still holding the volumes insert battery
8. Should now be in download mode
Sent from my Samsung Blaze using my awesomeness

xArcane1x said:
I went through the same thing, I too thought I had to purchase a jig but the method I posted thanks to another member saved me, try again with a modification to step 6
1. Turn off phone
2. Remove battery
3. Remove sim card
4. Remove SD card
5. Plug in USB from computer
6. Hold volume up + volume down + power buttons
7. While still holding the volumes insert battery
8. Should now be in download mode
Sent from my Samsung Blaze using my awesomeness
Click to expand...
Click to collapse
Thank you. I just tried it a couple of times, without success. I have to go out now, but I'll give it another few tries later.
If I have to get a jig, should the Samsung Galaxy S be compatible? I'd think so, but I don't know for sure.

This is a slight variation of what everyone is suggesting...I was also getting vibrations when trying other methods.
Turn off phone
Unplug battery
hold volume rocker, make sure you're holding down both up and down
Insert battery
Hold power button until the warning comes up...only takes a few seconds

I said three buttons, because it seemed (at least to me) that you need to hold sides of the volume button down at the same time. It does not seem to be just a up/down button.
ubizmo said:
I think I've tried it at least 50 times now, with variations, and it's just not happening. I freely admit my ineptness, but holding down buttons is something even I can manage.
By "three buttons", I take it you mean two. I don't have separate volume up/down buttons on my Blaze; just a single rocker button. That's what you mean, right?
I did get as far as the warning screen, but from that screen there is no option for pressing up to go into download mode, so it seems that my warning screen is different from others'.
I guess the next thing is to research "Samsung jig" and figure out whether this is something I can possibly do.
Click to expand...
Click to collapse

rbeier1221 said:
This is a slight variation of what everyone is suggesting...I was also getting vibrations when trying other methods.
Turn off phone
Unplug battery
hold volume rocker, make sure you're holding down both up and down
Insert battery
Hold power button until the warning comes up...only takes a few seconds
Click to expand...
Click to collapse
Thanks for this suggestion, but it also didn't work.
This method, like some of the others, takes me into what I think is Recovery Mode. I'm not sure, because I don't really know what I'm doing. The message that flashes on the screen isn't really a warning. Doing it this way, i.e., releasing the power button but not the volume button after the phone starts, takes me to a screen that says,
Android system recovery <3e>
at the top. Then there are some options: reboot system now, apply update from sdcard, wipe data/factory reset, wipe cache partititon. I can use the volume button to select an option, and the "OK Key", whatever that is, to select.
Near the bottom of the screen, in yellow, is the text that I couldn't read before:
-- Verifying internal MMC block...
checksum confirmation -> check(0)
Not need checksum confirmation
already executed!!...
# MANUAL MODE #
And that's it. In the background of this screen, grayed out, there's a white triangle with a yellow exclamation mark in it and a little green android.
Is there a way to get from this screen to Download Mode?

adb reboot download
should get ya

shabbypenguin said:
adb reboot download
should get ya
Click to expand...
Click to collapse
I guess it might if I could get ADB to work. So far, no luck; but that's a whole different problem. There are pages upon pages of posts here from people having difficulties getting ADB to work, so it'll take days or weeks to sift through all that and figure out what I'm doing wrong.
I thought the actual rooting process would be fairly simple, and it would only get complicated when trying to install custom ROMS and that sort of thing, which I'm not trying to do. It appears that I was wrong. I think I just don't have the knowledge to do this.

ubizmo said:
I guess it might if I could get ADB to work. So far, no luck; but that's a whole different problem. There are pages upon pages of posts here from people having difficulties getting ADB to work, so it'll take days or weeks to sift through all that and figure out what I'm doing wrong.
I thought the actual rooting process would be fairly simple, and it would only get complicated when trying to install custom ROMS and that sort of thing, which I'm not trying to do. It appears that I was wrong. I think I just don't have the knowledge to do this.
Click to expand...
Click to collapse
Make sure you have Kies Air turned on when you try to connect. You can use USB or wireless mode then. I tried and without Kies, it would not connect.

amberSamsung said:
Make sure you have Kies Air turned on when you try to connect. You can use USB or wireless mode then. I tried and without Kies, it would not connect.
Click to expand...
Click to collapse
So I should have debugging mode and Kies Air turned on, and then ADB should be able to find the Blaze? I'll try it tomorrow.
Thank you.

[Q] Black screen + vibrate, Titanium Backup crash

Hey guys,
I unlocked my TF700T using the Asus unlock tool, then rooted it with Kingo App.
I opened a terminal on the device and ran "su" to verify that I had root, which worked I did.
I then installed com.keramidas.TitaniumBackup ("Titanium Backup ★ root") and began a full backup, but at 65% my Internet connection dropped (not sure if related, but interesting timing) and the system froze. After 10 minutes at 65% I powered off the device in an attempt to reset.
However, the device now will not start. The screen remains unlit. Charge LED will not light. Holding Power for 6 seconds and holding Power + VolDown result in a short (500ms?) vibrate, but nothing more.
I have not yet tried a paperclip reset, or connecting the dock. I have tried connecting to both USB and power. With USB, Windows 8 detects it as a crashed device (no surprise there) and fails to install a driver.
I suspect I'm hosed, but I'd be interested to learn why.
Any theories or suggestions?
---
Android 4.2.1
Firmware V10.6.1.14.10

Same behavior with dock connected.

After connecting power through the dock, the charge LEDs have both lit.

Ah just re-read and realised you only get a vibration but no screen..... Bummer - not sure what to suggest for that one.

Well, thanks for trying
Sell it for parts, I reckon.

logankoester said:
Well, thanks for trying
Sell it for parts, I reckon.
Click to expand...
Click to collapse
Since you don't have much options, you can try these. I think that there were a few users were running into this problem and tried this. Some reported back that it was not working and some did not say anything. So I don't know if it works or not but you could give it a shot.
Try these combinations:
1. Hold the power button + volume up. You will feel the first vibration and keep holding both buttons until you feel the second vibration. As soon as you feel the second vibration, you need to release the volume up button But you must keep holding the power button. You need to hold the power button until you feel the third vibration. The third vibration is when your device is trying to boot up. You may want to try a few times with those sequences above in hope that it will bring up your bootloader.
2. If the above sequences don't work out for you, you can try this second solution. However, you need to hold both power button + volume down this time with those sequences above. Please report back with the outcome, thanks and good luck...:fingers-crossed:

My phone does not turn on anymore

Yesterday I was watching a youTube video and my phone started restarting (crash?). The Google logo and ofcourse the unlock are showing (the device has been rooted a long time now), but it did not go beyond that. I then decided to hold the power button for a long time to manually restart the phone again myself, but after trying to restart my phone is not turning on anymore.
I already tried the standard things like holding the power button for a long time and in combination the with volume up and down buttons. When I plug in my phone it does make a sound like the device is connected to the laptop (most likely the adb drivers and ****.
Is there anything else I can try to get my phone up and running again? Also when in laptop or by adapter the phone does not show any sign of charging. (my phone was 75% full when the phone crashed).

Try holding Power and Vol down only during 10s.
If it doesn't work plug the phone to a charger and try again later.

Primokorn said:
Try holding Power and Vol down only during 10s.
If it doesn't work plug the phone to a charger and try again later.
Click to expand...
Click to collapse
I have tried that multiple times.

Do you have an early model by any chance? Launch maybe?
I bought mine at launch and it had a faulty power button. This also looks like a random reboot, because the power button is being "held" for a couple of seconds. I also hat a couple of times when I couldnt't turn on the device anymore - again, because the power button wasn't working correctly.

SuperSpongo said:
Do you have an early model by any chance? Launch maybe?
I bought mine at launch and it had a faulty power button. This also looks like a random reboot, because the power button is being "held" for a couple of seconds. I also hat a couple of times when I couldnt't turn on the device anymore - again, because the power button wasn't working correctly.
Click to expand...
Click to collapse
There is a possibillity. The nexus had problems with the power button a year ago. So I now RMA'd it,

Cannot power on phone

So before, my power button gave me issues where it required substantial force to be used in order to get any response. Now all of a sudden, the fingerprint sensor went out as well as the power button itself. When attempting to do a hard reset to correct the problem, the phone won't turn on anymore. So it would seem that the power button no longer works and now I cannot turn on my phone . I've attempted to go into download mode or even the bootloader with little to no luck at all.
Does anyone have an alternative way to power on the phone so I can attempt to backup my data?

konoha457 said:
So before, my power button gave me issues where it required substantial force to be used in order to get any response. Now all of a sudden, the fingerprint sensor went out as well as the power button itself. When attempting to do a hard reset to correct the problem, the phone won't turn on anymore. So it would seem that the power button no longer works and now I cannot turn on my phone . I've attempted to go into download mode or even the bootloader with little to no luck at all.
Does anyone have an alternative way to power on the phone so I can attempt to backup my data?
Click to expand...
Click to collapse
This took a lot of trial and error with various button combinations, but I think I found a solution that works.
You must use the wall charger and cord. That's what I used.
1. Press and hold the volume up and down button at the same time.
2. Plug in the wall charger to the charging port.
3. You will see the lg logo on your phone.
4 Right when you see the lg logo unplug the charger from the phone.
5. Continue holding the volume up and down button.
6. LG logo will go away and then come back and your phone should boot.
5. Release the volume up and down button when it starts to boot.
Note: If you don't pull the power cord right when you see the lg logo, it will go into charging mode.
I was able to successfully boot my phone from a powered off state this way 3 times with no problem.
Once you get it booted, you could download an app from the play store to remap a volume button to be a power button as a temporary solution.
https://play.google.com/store/apps/details?id=com.teliapp.powervolume
Other options:
https://play.google.com/store/search?q=power button to volume button
I hope this helps.

duke69111 said:
This took a lot of trial and error with various button combinations, but I think I found a solution that works.
You must use the wall charger and cord. That's what I used.
1. Press and hold the volume up and down button at the same time.
2. Plug in the wall charger to the charging port.
3. You will see the lg logo on your phone.
4 Right when you see the lg logo unplug the charger from the phone.
5. Continue holding the volume up and down button.
6. LG logo will go away and then come back and your phone should boot.
5. Release the volume up and down button when it starts to boot.
Note: If you don't pull the power cord right when you see the lg logo, it will go into charging mode.
I was able to successfully boot my phone from a powered off state this way 3 times with no problem.
Once you get it booted, you could download an app from the play store to remap a volume button to be a power button as a temporary solution.
https://play.google.com/store/apps/details?id=com.teliapp.powervolume
Other options:
https://play.google.com/store/search?q=power button to volume button
I hope this helps.
Click to expand...
Click to collapse
Holy ****, this method works! Thank you so much, you just saved my bacon!

konoha457 said:
Holy ****, this method works! Thank you so much, you just saved my bacon!
Click to expand...
Click to collapse
You're welcome. Glad I could help.

fkin ****e it worked. thank you my dude

Samsung S8+ (SM-G955UZKATMB) Boot error / "Upload Mode - Unkown Error"

A friend of mine tried to root his S8+ from T-Mobile while following random instructions on the Internet and got his phone into this weird boot screen, which I must say I have never seen before.
Note: I have tried many times to enter to download mode by using the power button, bixy, vol- combination to no avail. When I turn the phone off and plug it in into the computer it gets recognized as QUSB_BULK.
[ UPLOAD MODE ]
Unknown Error
DDR Vendor : unknown
SOC_HW_REVISION : 2.1
skip print_summary_to_lcd...
Generating summary...
>>General Info
>>DDR Info
>>DCVS Info
>>RPM
Recovered from an exception
Done...
I was wondering if any of you have had similar experiencies or perhaps even help me find a solution. Thank you in advance for your assistance.

This isn't anything out of the norm and has been covered more times to count. Get back into Download mode and finish the process.

Thank you for your answer and thank you for pointing out that I should have said that I've tried countless times to enter download mode by pressing vol- + power button and then power + vol- + bixby to no avail.
The only way to get the phone to boot into something is to press all buttons together while waiting around 10 seconds which, gets me to the screen in the picture.
Is there another way to enter download mode apart from using the regular bixy + vol - + power button combination?

hold down vol- and power only. when it resets, immediately keep trying bixby vol- and power. also if the phone is in a case take it out.

i think you have a fake s8+

It doesn't work, it gets detected as QUSB_BULK every time, only if I press all buttons does it give me a screen which is the one posted.

This is a genuine S8+ from T-mobile, I've made sure of it!

This happened to me
This is the worst, after giving up thinking my phone was bricked I just let it run out of battery. After it was dead i held volume down + power + bixby while plugging in a charger and to my suprise it went into download mode. I tried again and again to confirm it worked and it worked every time. So you just have to wait till the phones completely dead, and hold those 3 buttons while plugging it in to a charger.

Thank you for your answer, I did try that but it didn't work for me... no download mode, just that upload mode - unknown error...

I have the same issue plz help

Yup I've seen that same screen you're referring to on my S8+ Tmobile. It's tricky but you can make it work. Change the way you try to hold that combination of buttons. As previous answers mentioned, you have to be quick.
Here is what worked for me:
I plugged the phone into the computer, using the original USB cable.
Hold "PWR"+"BXB"+"VOLUP" until you see the phone's screen blacking out completely. Then IMMEDIATELY hold "PWR"+"VOLDN" and keep holding. That should put you back into Download Mode.
Again, it'a bit tricky so keep trying and checking your technique but you should eventually get it.

I've seen that issue before where no button combination gets you out the QUSB_BULK mode. I'm afraid it's a corrupted bootloader (aboot), which can only be fixed using a special "Dead-Boot" package, which uses a QComm low level loader (not download mode). You can search for it, but it's pretty hard to get since it's specifically written for each model. Here's a package available on a pay site https://combinefile.com/index.php?a=downloads&b=file&id=32731