[Motorola Droid Bionic] MoodSwinger:
Getting GSM (& Straight Talk) working on the Droid Bionic running Jelly Bean 4.1.

If you're here I'm sure you know now that it is possible, contridictory to all those who claim it's not because of these specs or that data sheet or press release.

Apparently it has the exact same radio / chipset as other Moto World phones it's just not for lack of a better term "unlocked".

BTW...If I was to recommend an order to do the "trifecta" in, this would be the last step. I doubt it would effect rooting. But MOST of the problems I ran into updating to JB had to do with the fact I originally did this when I was still on ICS, then it caused a bunch of probs while trying to update. Namely all of the "System 7" errors. See that thread for more.

****FIRST AND FOREMOST*****

Make copies of every file you change in their current untouched state, before editing, and if you can't, keep notes of their current values.

Also do not do this with the SIM in, it's not required for anything other than testing and getting a signal at the end.

This, from my experience, is also the cause of the "android.phone" shut down error loop.

IF you get that, shut the phone down in between hitting the "ok" button of the error loop and remove the SIM and continue. Once you finish and have reception it shouldn't return.

Follow the build.prop edits shown on the XDA thread "Bionic working on T-MO."

*You have to have root access to edit this file. I use ES File Explorer, use in "root" mode and enable R/W for everything. Whatever file explorer you use I'm sure it's similar, just look thru the settings.*

Then I saved changes & rebooted, and did the RadioComm part. Apparently this is the step that turns on / unlocks the GSM radio.

When you open RadioComm and it asks what setting to start on pick, same as chipset setting (will edit & update w exact in a minute don't have it open right now, you have to scroll about midway down the list tho.)

*If the big box in the middle right doesn't fill up with code, or totally turn green after you make the change to the first (16) numbers & save, somethings wrong and the edit didn't save. restart the steps & make sure they're right. Close RadioComm. You're done with it (...for now)

Disconnect Phone & Reboot.

After boot go to Dialer and type *#*#4636#*#* (*#*#info#*#*), should go right to a menu & pick Phone Info. go down to "set preferred network type" & pick WCDMA. back out and should be done.

People have said this won't stay set for them. Following all the instructions, I've not had a problem keeping a network set. I believe this is controlled with one of the build.prop edits. There are suggested fixes out there, if you go thru the settings and edits and you're still having a prob, try those.

In truth, mine defaults to GSM/CDMA auto (PRL), but it doesn't seem to effect my service, and I believe that will auto switch between networks which is fine with me becasue I can't get CDMA with the GSM sim anyways.

If you just want GSM, that should be it. Power down, put your SIM in and reboot. If you have AT&T or T-Mo, the APNs are already loaded and should default after phone reads SIM.

If you get "unknown SIM" dialog just click "ok". It will come up every time you reboot your phone tho so if you want to put an end to it, there's a quick build.prop edit that fixes it. Will Post exactly when I find it again.

but it's something like changing:

vzwphone=1 to

vzwphone=0 (only for ref until I get it up).

****Straight Talk (At&t SIM)

Before putting in SIM and after Preferred Network change.

go to Dialer, ##7764726 (##program) & hit "call" / phone button, enter "000000" for SPC password & "Verify".

Go down to #13 APN Controls,

then APN Config Edit.

Touch menu button on phone (4-squares) & New APN.

These are my settings & Voice, Data & MMS all work.

Name: Straight Talk AT&T

APN: att.mvno (make sure "MVNO" had this as MNVO and couldn't figure out what was wrong)

MMSC: http://mmsc.cingular.com

MMS proxy: 66.209.11.33

MMS port: 80

MCC: 310

MNC: 410

APN type: default,supl,mms,hipri,dun (no space betw commas)

That's it. anything not listed above was left blank or as it defaulted.

power down put in SIM, and in a few minutes you should have service.

If you do, try going on internet, if that works, try sending yourself a picture msg.

All have worked for me.

****BTW - 2 things....make sure you have Wifi turned off, & you have mobile data enabled / on. (the mobile / packet data "On" thing was the issue with my Captivate Glide not getting data & MMS and it drove me nuts, then to find out it was just a switch & bang worked great.)

I hope this helps at least someone.

Cheers.