19 replies to this topic

[Flameroid]

I fastbooted down to .211 after having root problems on JB ota. The "boot" file in the middle of the fast boot failed but the rest completed. After finishing the fastboot, I powered on my razr but there is only a black screen after the bootlogo. I could not power off my razr to go back to fastboot, so I let the battery run out. after the battery ran out, I plugged in my razr to see the bootlogo come up and freeze there. I could not turn off my phone unless I unplugged. When off, I could not enter fastboot mode. Can someone please help me get back to fastboot mode so I can restore my razr?

[tmyinc]

Unfortunately you cannot fastboot back to ICS after taking the JB update. Letting the battery die was also not a good idea lol. You will probably have to get a factory cable or adapter to get back into fastboot mode. If the battery is dead or terribly low fastboot wont work. Once getting a factory cable you will have to use RSD lite and the JB fxz to get your phone back up and running.

[Flameroid]

Where do I get a factory cable?

[Flameroid]

While that bootlogo is frozen, will it charge?

[tmyinc]

Factory cables are found here.

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Im not sure if it will charge while on the boot logo. If you plug it in and see the charging light come on you might be good. Plug it in for a while and then unplug it and hold the power and both volume buttons down for 10 seconds or so and see of it goes into the bootloader. If it does scroll down to fastboot and see what the battery status says. Although I highly down you will be able to charge it, it is worth a try.

[Flameroid]

I plugged it in and left the house for an hour and it was stuck on bootlogo.

[robocuff]

Plugging it in to a wall charger should bring up the battery charging animation on the screen. If you aren't seeing that, chances are it's not going to charge. You'll have to get a factory cable and use that to fastboot. The factory cable won't charge your phone though. It only supplies power to the phone so that you can flash the phone. Once you've flashed the phone the charging software should be back and you should be able to plug it in and charge it using a regular charger/cable.

To use it, just plug it in to your phone. I've got one but have never had to use it so I'm not sure but I believe once you plug it in to your computer the phone will boot to either fastboot mode or to the bootloader so you can select fastboot. Then it's just a matter of flashing the phone, charging it and you should be good to go.

If you leave the factory cable plugged in after fastbooting it will boot to the OS. So, if you wanted, you could set it up that way before charging it. As soon as you unplug it though, it will shut down. Just something to be aware of.

Plugging it in when the phone is off but properly flashed will make the phone boot to the OS. Whether you have the battery charged or not.

There are other ways you can get the battery to charge. Majormer wrote a guide about it. You can have a look at it

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. Safest bet is still the factory cable, IMHO.

[Flameroid]

Plugging it in to a wall charger should bring up the battery charging animation on the screen. If you aren't seeing that, chances are it's not going to charge. You'll have to get a factory cable and use that to fastboot. The factory cable won't charge your phone though. It only supplies power to the phone so that you can flash the phone. Once you've flashed the phone the charging software should be back and you should be able to plug it in and charge it using a regular charger/cable.

To use it, just plug it in to your phone. I've got one but have never had to use it so I'm not sure but I believe once you plug it in to your computer the phone will boot to either fastboot mode or to the bootloader so you can select fastboot. Then it's just a matter of flashing the phone, charging it and you should be good to go.

If you leave the factory cable plugged in after fastbooting it will boot to the OS. So, if you wanted, you could set it up that way before charging it. As soon as you unplug it though, it will shut down. Just something to be aware of.

Plugging it in when the phone is off but properly flashed will make the phone boot to the OS. Whether you have the battery charged or not.

There are other ways you can get the battery to charge. Majormer wrote a guide about it. You can have a look at it

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. Safest bet is still the factory cable, IMHO.

those tricks require going to fastboot mode. I can't get there.

[Flameroid]

is it possible to ADB into fastboot? If so, can someone tell me how?

[Memnoch73]

is it possible to ADB into fastboot? If so, can someone tell me how?

ADB won't help. That runs only in the OS.

You should be able to get to fastboot but it's tricky. If you are stuck on the red m or bootlooping hold power plus vol down for 10 seconds til the screen goes black. Then immediately switch to holding power plus BOTH volume buttons. It may take a bit but if you get the timing right you should be able to get to fastboot.

You will still probably need to cable adapter to charge as you will probably be too low on battery for Fastboot commands

[robocuff]

Well, one of those tricks doesn't, if you're willing to take the back off your phone.

[Flameroid]

once I get a factory adapter, do I fastboot to ics or JB, and if JB, can someone give me a link to the files?

[Flameroid]

If you leave the factory cable plugged in after fastbooting it will boot to the OS. So, if you wanted, you could set it up that way before charging it. As soon as you unplug it though, it will shut down. Just something to be aware of.

Plugging it in when the phone is off but properly flashed will make the phone boot to the OS. Whether you have the battery charged or not.

So with a factory adapter, I should be able to use my phone at any time, even without charge?

[Flameroid]

is there a JB razrutility?

[aktrazer]

is there a JB razrutility?

Yes, in the development forum. This is what you'll need:

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It can fastboot back to stock JB. You'll need to go to JB because you had been on it previously. As stated earlier you CANNOT go back to ICS once you're on JB. Use this utility and youll be back to stock JB.

[Flameroid]

Say I would need to use my phone when it's dead, could I use the factory adapter to use it instantly?

[robocuff]

Say I would need to use my phone when it's dead, could I use the factory adapter to use it instantly?

Yes

[Flameroid]

I plugged in my phone with a factory cable and the bootlogo shows up then a black screen. I still can't get to fastboot.

[robocuff]

With the phone shut off, try pressing volume down and then while continuing to hold down the volume key, plug it into the computer.

[Flameroid]

Thanks for your help guys. I'm all good.