Is your bootloader unlocked?

[Guest hecatae]

If you have recently acquired a Nokia Lumia device, you may be surprised to find out that Nokia has not locked down the bootloader, giving full NAND read/write access!

To check:

• Turn off your phone
  
• Hold down Volume Up and Power
  
• Connect your phone to your computer with the USB cable, you will hear a short vibration
  
• Keep holding those buttons
  

Check your computer and see what device is detected. You can find this in Devices and Printers on Windows, in the Device Manager, or just check what device it is trying to install drivers for. If you're on Linux, run lsusb.

On Windows:

if you see NOKIA DLOAD, you have a locked bootloader.

but if you see Qualcomm MMC Storage USB Device you have an unlocked bootloader!

On Linux, using lsusb:

if you get Qualcomm, Inc your bootloader is unlocked.

usbcore: registered new interface driver usb-storage

USB Mass Storage support registered.

scsi 2:0:0:0: Direct-Access     Qualcomm MMC Storage      2.31 PQ: 0 ANSI: 2

sd 2:0:0:0: Attached scsi generic sg2 type 0

sd 2:0:0:0: [sdb] 31047680 512-byte logical blocks: (15.8 GB/14.8 GiB)

sd 2:0:0:0: [sdb] Write Protect is off

sd 2:0:0:0: [sdb] Mode Sense: 0f 0e 00 00

sd 2:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA

sdb: sdb1 sdb2 sdb3 sdb4 < sdb5 sdb6 sdb7 sdb8 sdb9 >

sdb: p9 size 30632075 extends beyond EOD, enabling native capacity[/code]

[Guest phil8715]

Can you unlock the bootloader if yours is locked by downgrading to the Qualcomm bootloader?

[Guest hecatae]

Can you unlock the bootloader if yours is locked by downgrading to the Qualcomm bootloader?

Hi Phil, yes you can on the 710.

[Guest phil8715]

I've further looked into it and it seems the phone's firmware version is higher than one that is needed.

http://forum.xda-developers.com/showthread.php?t=1599401

My firmware revision number is: 1600.3013.8107.11502

My hardware revision number is: 112.1402.2.1

Is it still possible?

Edited May 19, 2012 by phil8715