http://www.droidforums.net/forum/motorola-droid-bionic/214902-downgrade-902-no-app-data-loss.html
Here's the original thread that I used to actually get this method, so thanks to SamuriHL on XDA and he's also over here on AC as well. He wrote that thread for downgrading... you know what, forget it... let's just do this thing.
I did loads of reading and figuring out the other day, I don't know who's method this is, I have it here somewhere, but I'm just going to give you the do this do this do that and presto version of this method. FIRST, download every attachment I have put on this post. Hmm... I'm having trouble getting the most important one of them uploaded... it may just be too big, I will find another way to get it to you... just download those two that are there...
.... this is me thinking... .... ..... .... ??? .... ...... ..... ... .. ......
Go into the thread I linked you up there and download the two zips at the end that are called House of Bionic... love that by the way.... Inside one of those zips is a file called
newvrz_xt87... and some more... .zip
When I download files from someone that says "Just download this" I am extremely tentative. You don't know me, really you don't have any reason to trust me. Aside from me just saying this... It works and I'm not a crook, so trust it! HA. Now, really, I don't need or want anything from your phone, so just get this thing going.
Now you're done wondering what kind of a freak I am and you're done downloading these things.... Open the rars and the zip with that file you located earlier and put them all on your desktop for ease of access and then so you can delete them if you wish later.
Now, first, install the Motohelper Device drivers - this come straight from Motorola and it's safe.
Then install RSDLite. This comes straight from somewhere and it works and didn't hack me, so that is probably safe too.
Now, the challenging part. You need to boot in to AP Fastboot. Like my earlier post, you need to press the POWER and BOTH VOLUME BUTTONS. when you do that a white lettered screen appears. Use the down button to get to AP Fastboot, then the UP BUTTON to select.
Once you get to the next screen, Start RSDLite on your computer. Connect your Bionic via a USB cable and for best results, use one in the back of your computer because they are... you know what, just use it...
On RSDLite, you will see a long box with "Filename" to the left of it. On the right, there is a button that has "..." on it. Really, that's the Browse files button, but no words for some reason. Click that browse files button.
Now, hunt down that file called newvrz_xt87 blah blah. Oh yeah, don't unzip that file once you have it out of the House of Bionic zip! Select that file, when you do you will get a window that pops up. Click the middle box that says uncompress and flash, I think.
Now, leave your phone connected and just wait wait wait wait wait. It will rock and roll for up to 15 minutes, maybe more. Eventually, it will restart your phone. Pay attention to the little excel looking box and it will tell you what your phone is doing at the moment. When it resets, just let it sit there. Be patient. Let it run it's course.
If your phone is booted and you haven't gotten a "Success" or some sort of similar word in the Result block, then go ahead and set your phone up.
You will be on STOCK version .902. You will need to get the Over the air (OTA) update to .905 which will bring you all the way back to exactly where your phone was WITHOUT Root, WITHOUT hacks... just like you popped it out of the box new.
Have fun!