Last week Cherry Mobile just release their update for the MagnumHD. Thanks to Aryan Limjap for the shoutout telling me about it. Its a nb0 file about 160MB which uncompressed to about 402MB. Sweet, right? Screw that, they goof the instructions.
They said to download the file, and copy it into your SD card. No problem unless your one of those asses who didn't buy a SD card or believed he didn't need one. And if you couldn't afford one, then you might be simple be screwed. Fine lets move on.
Next, they said to enter bootloader mode - done by pressing and holding the volume up + down + power buttons. Now, they didn't explicitly say to hold all three buttons down at the same time. Unless, you're like me, you'd be forgiven if you thought that you should press and hold the volume up then down and then power in sequence. But then again...You're such a newb.
Now, you should Press ‘Home’key to show the update utility. Use the volume buttons to select the option “Download nb0 from SD card”. I think this is where it gets scary for you tadpoles. You should see a bunch of text popping up. Now if it says something to the effect that is was successful then no worries. But if not, then you'll have to do an extra step.
You have to rename that stupid file: FB0-318B-0-5019-A01.nb0 to say firmware.nb0. After you have rename it just re-enter the bootloader mode. And redo the whole "Download nb0 from SD card" procedure.
BTW, make sure that you have atleast 70% battery when doing this. We don't want any bricked CM Magnums, do we?
One more thing, by doing this, you will need to root your phone again. Yeah, I know, what at bitch.