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  1. Thread Author  Thread Author    #1  
    valenzetti's Avatar

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    AOKP Jellybean

    Exclamation Build Number IMM76Q - Service drop fix.

    Hi, this is my first post (on any android forum, really) and i'd figure i'd contribute something useful for everything i've gleaned off of this place so far. If i'm posting this in the wrong place, feel free to move it! I still consider myself a noob, so if there is any information missing or this is poorly written, redundant, illogical, using wrong terms or concepts, smelly, unhappy, deranged, outdated or otherwise wrong.. let me know.

    So, I spent literally all day getting this issue fixed. I think a lot of the reason it took so long is because of issues with my computer but still, this has been insane, and i'm a little pissed off about it but i'm not sure who to direct it at, haha. Apparently this build has major issues, the most obvious being the fact that it, for no apparent reason, drops data AND service every 2-30 minutes. Incredibly vague but there seems to be no cause (though of course there is, nobody has pinpointed it).

    I work at a cellphone repair shop and a while back was demoing a Nexus from my shop and after working my way up through the Droid 1, Droid 2, Fascinate, Stratosphere, Droid Charge, Razr MAXX and finally getting a Nexus - I was in love. It was a used phone, it was rooted when I got it but one day someone sold our shop a brand-new-still-got-the-sticker-on-the-display Nexus. I opted to swap mine for the new one because I wanted to own my device from the beginning - brand new battery, official Samsung charger and headphones, completely stock. Went through the whole process of unlocking the bootloader, rooting and throwing several custom roms on there, but one thing that remained consistent was the signal drops. I thought I had screwed something up in the rooting process but what I discovered is that it is, in fact, an issue SPECIFIC to the Build Number IMM76Q. If you don't know how to identify your build number, go to Settings then About Phone and it's the last on the list. I've flashed an older build now, though, and have had consistent connectivity for an hour. That's a first since getting this phone.

    As I said, there seems to be no cause, and I still haven't figured it out - now, I don't care to because I got a fix for it. I figured i'd share my findings here because everything I had to do to get this to work was insane, and some of it was probably specific to my personal settings and configurations on my computer. I'm writing this from the ground up assuming no knowledge on the behalf of the viewer, cause let's face it, even noobs deal with data drops.

    ------------------------------------

    So to preface, the issue is with your build of Android, IMM76Q (if you hadn't figured that out already by everything i've typed) and the solution is to replace your build with another build. I used IMM76K, it seemed to be the latest stable version prior to this piece of garbage. If you follow this tutorial, I cannot be held responsible if you bork your phone, and please be aware that you will lose all data, even on the external (internal?) SD portion of your phone. It will be a brand new Nexus as far as your files are concerned, so backup everything you'd like to save beforehand. This tutorial is going to be specifically dealing with the US Verizon/CDMA Nexus. This will also be described as done on Windows. I am not entirely sure if it can be done on Mac - i've yet to see my OSX partition recognize my Nexus. Read the entire tutorial before starting. This WILL require root, so if your phone isn't rooted, or you have no idea what that means, check step 1. If your phone is rooted, skip, obviously.

    ---

    1. Root your phone
    2. Backup your files
    3. Install Google API within the SDK
    4. Download the older build
    5. Flash the older build
    6. Success

    ---

    1. Root your phone:

    I'm not writing a tutorial on that here, it's way too much information but if your phone isn't rooted and you have no idea what i'm talking about, do some reading HERE. If you understand rooting but you just haven't rooted your phone yet, that info is HERE. Once you're done, move on to step 2!

    ---

    2. Backup your files:

    Backing your files up is pretty straight forward. If you've never backed up files from your Nexus, it's a good idea to do so regularly because if you don't have any sort of cloud backup, if you brick your phone or drop it in the toilet you lose everything. As a cellphone repair dude, I highly recommend it.

    To do so, take the data cable that came with your phone, remove it from the charge block and plug your phone into your computer. Click Start, Computer, and in the window that opens you should see your Nexus listed among the drives. Open it, find the files you want to save, and copy them from their location on your phone to your desktop, documents, wherever. Done.

    ---

    3. Install Google API within Android SDK:

    I assume that this step is probably already taken care of if your phone has been rooted but i'm adding it in for good measure. If you've already done this, skip to step 4.

    You'll need to install drivers to allow your computer to communicate properly with your phone. This can probably be done a few ways but the way I was able to do it successfully was through SDK. Depending on what version of Windows you're on, your computer might try to install the drivers automatically as soon as you connect your phone - I can't remember if that ever did it for me but this time I HAD to install from the SDK, once I got my phone to the bootloader my computer and phone could no longer communicate.

    Open Android SDK (if you can't find it, Start -> search Android SDK) and when you run it for the first time it will attempt to install a few files to give minimal functionality to the software. There's a checklist on the left side of the program UI that has a few files listed, make sure Google API is checked before you start the install. If it's not and you don't install it at first, you can install it next. Make sure that particular package gets installed though, and you SHOULD have the right driver set.

    ---

    4. Download the older build:

    Since the Build Number we are using is IMM76Q, we need to look for something that ends in a letter lower than Q. I chose IMM76K, and there are a few others but I would recommend that one specifically. It's important to note that not all are right for the Nexus (for example, IMM76M is for the Nexus S and will brick your phone), so go with IMM76K.

    The file is available HERE, and is the second to the last on the page. Download and save it to your desktop. The file is a tgz file, which is an archive but useless in its current form. You need to extract it, then copy all of the files in the archive (there should be six files) to your platform-tools folder we left open earlier.

    ---

    5. Flash the older build:

    Here's the meat of this tutorial. If you've already rooted your phone this shouldn't be too crazy for you. Pull up your platform-tools folder and shift click in the folder (not on a file or with a file selected) and choose "open a command prompt from this window' or whatever it says. You'll want to make sure your phone is plugged up and powered on, and you're going to type a series of commands in the command prompt window. Be aware that some steps take a good bit of time to complete so do not under any circumstances unplug your phone during the process UNLESS you get hung up on "<waiting for device>". Always wait til the filepath comes up in the last line of the command prompt before proceeding to the next step. Step G and I take a long time.

    So here is what to type:
    a) adb devices
    Your phone should be listed by its serial number. If not, your computer isn't recognizing your phone and there's an issue with drivers.
    b) adb reboot-bootloader
    Phone should reboot and Windows will make a sound when it disconnects, and the same sound when it powers back on. If it makes a lower tone with three beeps, your computer isn't recognizing your phone and there's a driver issue.
    c) fastboot flash bootloader bootloader-toro-primela03.img
    d) fastboot reboot-bootloader
    e) fastboot flash radio radio-toro-i515.fc05.img
    f) fastboot reboot-bootloader
    g) fastboot flash radio-cdma radio-cdma-toro-i515.fc04.img
    h) fastboot reboot-bootloader
    i) fastboot -w update image-mysid-imm76k.zip

    ---

    6. Success:

    After that last line in command prompt, your phone should have rebooted on its own with a return to full stock. Yay!

    ---

    Like I said, this is my first post, so it's also my first tutorial. If it sucks, or is incomplete, let me know, but I hope I have helped somebody! I'm sure there's going to be some troubleshooting that needs to be done but i'm too tired to want to type what I can think of right now so whatever. Please give me feedback on this! Thanks!
    Last edited by valenzetti; 08-27-2012 at 04:20 PM. Reason: fixed critical typographic errors in the commands
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    Monkey Pi likes this.
  2. #2  

    Default Re: Build Number IMM76Q - Service drop fix.

    My original Nexus had the build number IMM76K and had the signal drop issue pretty bad (voice and data). My replacment has the build number IMM76Q and has been nearly perfect signal wise..
    Last edited by rxmorph; 08-23-2012 at 11:48 AM. Reason: Was getting annoying scrolling through the entire previous post twice..sorry guys ;)
  3. Thread Author  Thread Author    #3  
    valenzetti's Avatar

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    AOKP Jellybean

    Default Re: Build Number IMM76Q - Service drop fix.

    Interesting. My experience has been exactly the opposite - original Nexus had IMM76K with no issues, but the new one had IMM76Q with frequent issues. Since flashing IMM76K to this one, it's had consistent signal. This repair is of course only for people who have the same issue I had.. so you have nothing to worry about
    wildchild420187 likes this.
  4. #4  

    Default

    Quote Originally Posted by rxmorph View Post
    My original Nexus had the build number IMM76K and had the signal drop issue pretty bad (voice and data). My replacment has the build number IMM76Q and has been nearly perfect signal wise..
    What hardware rev do you have? It's behind the battery. Should look like xx.xx. ex: 12.01.
  5. #5  
    Dr0me's Avatar

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    Default Re: Build Number IMM76Q - Service drop fix.

    i thought people determined that 76Q was simply removing unified search and did not have different radios.. sounds like a hardware issue to me
    Google Android Affectionado
    wildchild420187 likes this.
  6. #6  

    Default

    Quote Originally Posted by agalvin13 View Post
    i thought people determined that 76Q was simply removing unified search and did not have different radios.. sounds like a hardware issue to me
    I agree. IMM76Q seemed to be a patch for the unified search to be in compliance with the patent wars. Radio software update is what we need. And they need to focus on the lte radio in particular. That's where the momentary signal drop issue lies.
    wildchild420187 likes this.
  7. #7  

    Default Re: Build Number IMM76Q - Service drop fix.

    Quote Originally Posted by whitewallman View Post
    What hardware rev do you have? It's behind the battery. Should look like xx.xx. ex: 12.01.
    It's 11.11
  8. #8  

    Default

    Quote Originally Posted by rxmorph View Post
    It's 11.11
    11.11 should be showing you a baseband of I515.9. And you're getting signal drops!? (Edit) I misread. You're not getting signal drops, and that's why! You're now on one that has radio software that's built around the older hardware specification. Guard that baby with your life!
    Last edited by whitewallman; 08-22-2012 at 02:40 PM.
  9. #9  

    Default Re: Build Number IMM76Q - Service drop fix.

    Quote Originally Posted by whitewallman View Post
    11.11 should be showing you a baseband of I515.9. And you're getting signal drops!? (Edit) I misread. You're not getting signal drops, and that's why! You're now on one that has radio software that's built around the older hardware specification. Guard that baby with your life!
    Yeah, lol. Doing my best. The screen quality/color doesn't seem as great as my original one and there is some burn in (notification bar and whatnot) but it isn't absolutely horrible. I figure odds are getting a completely perfect one isn't great, but it is nice not always dropping signal throughout the day and dropping calls.
  10. Thread Author  Thread Author    #10  
    valenzetti's Avatar

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    AOKP Jellybean

    Default Re: Build Number IMM76Q - Service drop fix.

    My hardware rev is 12.06.. so you guys are saying that when certain hardware revs are paired with certain build numbers, that's when the problems occur?
  11. #11  

    Default

    Quote Originally Posted by valenzetti View Post
    My hardware rev is 12.06.. so you guys are saying that when certain hardware revs are paired with certain build numbers, that's when the problems occur?
    From my testing of several handsets, 12.xx hardware rev (tested 12.01), which shows as baseband I515.10 can suffer this..I just received a 12.07 rev but haven't tested yet. Do you get signal drops? It's my contention that when newer h/w rev is paired with older radio software, is when problems occur. The problem lies in the lte radio software specifically. Ie: take lte out of the equation and signal drops go away completely.
    Last edited by whitewallman; 08-22-2012 at 06:14 PM.
  12. #12  

    Default Re: Build Number IMM76Q - Service drop fix.

    Okay so I have hardware 11.12 with baseband 1515.10 and I'm on imm76q
    And I'm getting absolutely terrible signal drops and bad signal in general. Should I try switching to imm76k? Or is that a waste of time?

    Is there any hope for this issue? I'm really going insane.
  13. Thread Author  Thread Author    #13  
    valenzetti's Avatar

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    Default Re: Build Number IMM76Q - Service drop fix.

    Bmar29, this tutorial is intended to address the issue you're having. I'm pretty sure you and I were having the same problems.

    Whitewallman, I was having terrible signal drops with IMM76Q, but when I swapped to IMM76K they stopped completely. It didn't matter if I threw a custom rom on there or not, the radio stayed the same and gave me signal drops every 2 to 30 minutes. IMM76K fixed that.
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    bmar29 
  14. #14  

    Default Re: Build Number IMM76Q - Service drop fix.

    Thanks for the reply so does this mean that I can flash a jelly bean rom after I flash the imm76k and retain the good signal? What about when the official ota comes out?
  15. Thread Author  Thread Author    #15  
    valenzetti's Avatar

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    AOKP Jellybean

    Default Re: Build Number IMM76Q - Service drop fix.

    Yes, I flashed AOKP's Jellybean yesterday and have been maintaining good signal. If I have dropped signal at all, I haven't noticed. As far as the OTA, I would assume that Verizon would have addressed the issue IMM76Q is giving us but it's more than likely going to be a completely different radio, something later than IMM76Q. So that's something we'll have to see about when it happens!
  16. #16  

    Default Re: Build Number IMM76Q - Service drop fix.

    Quote Originally Posted by valenzetti View Post
    Yes, I flashed AOKP's Jellybean yesterday and have been maintaining good signal. If I have dropped signal at all, I haven't noticed. As far as the OTA, I would assume that Verizon would have addressed the issue IMM76Q is giving us but it's more than likely going to be a completely different radio, something later than IMM76Q. So that's something we'll have to see about when it happens!
    If you would like to keep a close eye on your signal status, you can download No Signal Alert from the play store. Keeps a log book of connection loss and return activity. Thankfully mine remains pretty blank with this replacement phone. It was quite the opposite with my original.

    Link: https://play.google.com/store/apps/d...NlZGNhbGwiXQ..
  17. #17  
    Dr0me's Avatar

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    Default Re: Build Number IMM76Q - Service drop fix.

    it seems to be unlikely that your reception would behave differently after flashing the same radios on substantially identical builds (besides unified search). Maybe there is something other to blame for the drops in reception than hardware. I havent really had much of a problem with them since 4.04 came out. It always surprises me when people talk so much about the G nex having problems online when i have never met any one in real life experiencing the issues.
    Google Android Affectionado
    wildchild420187 likes this.
  18. #18  

    Default Re: Build Number IMM76Q - Service drop fix.

    Quote Originally Posted by bmar29 View Post
    Okay so I have hardware 11.12 with baseband 1515.10 and I'm on imm76q
    And I'm getting absolutely terrible signal drops and bad signal in general. Should I try switching to imm76k? Or is that a waste of time?

    Is there any hope for this issue? I'm really going insane.
    I have identical numbers to you except i'm on IMM76K.

    If any of this means anything, then it would be a waste of your time to switch as I get the signal drops frequently as well.
    wildchild420187 likes this.
  19. #19  

    Default Re: Build Number IMM76Q - Service drop fix.

    Quote Originally Posted by valenzetti View Post
    Bmar29, this tutorial is intended to address the issue you're having. I'm pretty sure you and I were having the same problems.

    Whitewallman, I was having terrible signal drops with IMM76Q, but when I swapped to IMM76K they stopped completely. It didn't matter if I threw a custom rom on there or not, the radio stayed the same and gave me signal drops every 2 to 30 minutes. IMM76K fixed that.
    Correct me if I'm wrong here. But don't both builds (76Q AND 76K) USE the SAME radios? I thought that there was no hardware changes between the two builds?
  20. #20  
    fretwire's Avatar

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    Default Re: Build Number IMM76Q - Service drop fix.

    I bought 3 of these devices this week. The one I use is having consistent drops. It's to the point that I can't even complete a phone call, the service just drops completely. One thing I did notice, the other 2 phones aren't having the issue, so I looked through them.

    All 3 phones have the same baseband and the same software IMM76Q.

    My phone that drops consistently is 12.06 and the other two are 12.07.

    I'm thinking of trying this downgrade to IMM76K to see if this fixes issues, but it got me to thinking, could the 12.06 with IMM76Q be a major issue, does anyone else with this same set up have no problems with signal?
  21. #21  

    Default Re: Build Number IMM76Q - Service drop fix.

    Quote Originally Posted by fretwire View Post
    I bought 3 of these devices this week. The one I use is having consistent drops. It's to the point that I can't even complete a phone call, the service just drops completely. One thing I did notice, the other 2 phones aren't having the issue, so I looked through them.

    All 3 phones have the same baseband and the same software IMM76Q.

    My phone that drops consistently is 12.06 and the other two are 12.07.

    I'm thinking of trying this downgrade to IMM76K to see if this fixes issues, but it got me to thinking, could the 12.06 with IMM76Q be a major issue, does anyone else with this same set up have no problems with signal?
    I have 2 galaxy nexus phones. Both are 12.07 one is 76Q and the other is 76k. I have no problems with service or signal. Actually I am very happy with both of them. You have 12.06 I think that it is a bug when you pair 12.06 with 76Q. But there is essentially no difference between the two builds. They did not change anything except for the active search or whatever it is called. As far as I know no hardware changes were made. I don't know if any of this helps you but thought I'd give it a shot anyway. Let me know if there is anything else that I could possibly help with.
  22. #22  

    Default Re: Build Number IMM76Q - Service drop fix.

    I regret to report that going to IMM76K did not help. Do you guys think this could possibly be a problem with the internal antenna? I think they are relatively easy to replace yourself
  23. #23  
    Dr0me's Avatar

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    Default Re: Build Number IMM76Q - Service drop fix.

    it most likely is hardware related. No one really has a solution for fixing as far as I know. It seems the people who have problems with it get replacement phones that have the same problems. I don't know if they are just cycling the phones back out or if the users are doing something that causes the drops.

    It may have to do with the area you live in's coverage?

    Good luck though..
    Google Android Affectionado
  24. #24  

    Default Re: Build Number IMM76Q - Service drop fix.

    Quote Originally Posted by agalvin13 View Post
    it most likely is hardware related. No one really has a solution for fixing as far as I know. It seems the people who have problems with it get replacement phones that have the same problems. I don't know if they are just cycling the phones back out or if the users are doing something that causes the drops.

    It may have to do with the area you live in's coverage?

    Good luck though..
    Probably just cycling them if anything. I don't think it is any fault of the user or the area of coverage since my replacement has been great signal wise in same areas I would drop all the time with original Gnex.
  25. #25  

    Default Re: Build Number IMM76Q - Service drop fix.

    At this point im almost convinced it is a hardware issue. So what other hardware would be cause the problem other than the antenna? I just don't want to go outon a limb and replace the antenna only to have it have the same issues.

    Samsung Galaxy Nexus LTE Antenna Assembly with Ringer, Loud Speaker & Vibrator Original Samsung SCH-I515 Part
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