[Q] [UNLOCK AND ROOT]HOW DO I UNLOCK BOOTLOADER? [4.5.141 version out-of-the-box]

[K.A.]

Hey guys, i originally own a samsung galaxy ace and i've never ever ventured into the world of unlocked bootloaders and fastboot...My friend just got a new motorola Atrix 4G and it came with v4.5.141 OUT-OF-THE-BOX. I read the sticky in the development section warning not to update OTA to 4.5.141 but my question is, is there any way to unlock the bootloader on this phone which had the version pre-installed?
I'm an absolute n00b to bootloader unlocking and fastboot so if anyone could give a proper explanation, it would be greatly appreciated...

 

[twomoses]

Hey guys, i originally own a samsung galaxy ace and i've never ever ventured into the world of unlocked bootloaders and fastboot...My friend just got a new motorola Atrix 4G and it came with v4.5.141 OUT-OF-THE-BOX. I read the sticky in the development section warning not to update OTA to 4.5.141 but my question is, is there any way to unlock the bootloader on this phone which had the version pre-installed?
I'm an absolute n00b to bootloader unlocking and fastboot so if anyone could give a proper explanation, it would be greatly appreciated...

I found this post on Atrix Forums that only says if you have Gingerbread. I unlocked my Atrix recently, and I'd been running 2.3.6 for quite some time. My phone was originally the 2.2 I believe (it's been a little while), but the instructions there worked like a charm.

Best bet: Before doing anything, read all the instructions very very very carefully.

 

[K.A.]

I found this post on Atrix Forums that only says if you have Gingerbread. I unlocked my Atrix recently, and I'd been running 2.3.6 for quite some time. My phone was originally the 2.2 I believe (it's been a little while), but the instructions there worked like a charm.

Best bet: Before doing anything, read all the instructions very very very carefully.

Pretty well-explained and easy to follow guide....but there's a WARNING thread in the dev section regarding this 4.5.141 version so i'm still confused...
Thanks for the link though, really well explained

 

[twomoses]

Pretty well-explained and easy to follow guide....but there's a WARNING thread in the dev section regarding this 4.5.141 version so i'm still confused...
Thanks for the link though, really well explained

The warning is about flashing the previous SBF over the current one.

This is a warning that multiple users, including myself, have hard bricked their devices by SBF flashing to 1.8.3 after installing an official 4.5.91 update.

So, do NOT try to flash the SBF for 4.1.83 or 4.1.57 (both are Froyo) over the current 4.5.91 (Gingerbread). In fact, it's best not to flash any SBF at all if you can avoid it. There is one that's required to unlock the boot loader, but this is a file that was leaked from Motorola specifically to unlock the boot loader. If your phone works right and you follow the instructions, you should have no problems. (EDIT: I seem to have read somewhere that the SBF file for unlocking the phone was a leak, but I could be wrong here.)

Remember: There is always risk in bricking or breaking your phone. Every set of instructions I've come across says it, whether they be automated or manual.

 

[JMM2009]

Maybe Hard Brick

I had Atrix 4g OTA to 4.5.141, then Unlocked bootloader using script 4.2, then trid to rSD back but choose the wrong file i think it was 4.5.91 not my Atrix says failed boot 1 starting fastboot support, and when i try to RSD the 4.5.141 sbf i get RSD unable to retrieve interface handle error. any thoughts?