[AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin] hv6478:
[GUIDE/FIX] {S4-MULTI} No Sound &/ WiFi &/ Bluetooth After Unbrick/Update? Read Me!

THIS GUIDE CAN APPLY TO ANY MODEL, PROVIDED YOU ENSURE TO GET THE PROPER FILES FOR YOUR VERSION!

I've had success myself flashing stock firmware from the M919V for Wind Mobile onto my I337M with no issue. This shouldn't be an issue. However, for the purpose of this guide, it is important that you get the firmware that was intended FOR YOUR DEVICE!

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First head over here >> http://xdaforums.com/showthread.php?t=2559693 >> and check out the original thread that helped me get to this resolution. Thank you to all the lovely people there!!

Before my softbrick occurred, I had flashed the NE1 modem through ODIN. I found that the same modem remained regarldess of the firmware I flashed. So I thought to match them up and give it another go. This worked great. This will work even if it was a regular S/W upgrade or install that caused the no sound and/or WiFi and/or Bluetooth issue.

Quick note before we begin: this guide assumes that you already went through a softbrick and have successfully come back from it, or went through a software update/firmware install which resulted in the same issue. Some of the steps in this guide may be able to be applied to some parts unbricking a phone, but this is NOT the intention. The intention is to help recover sound, WiFi and Bluetooth AFTER a successful unbrick or failed update/install otherwise.

DISCLAIMER: I am not responsible for your phone melting, imploding, turning into maple syrup or dying. Follow at your own will!

PRE-GAME CHECKLIST:

- Determine the ORIGINAL FIRMWARE that came on your device (this one was important for me, not sure how crucial it may be for others) - to be honest, I'm not 100% sure how to figure this out other than looking at the phone's box. It should notate which software version (SW-VER) it is. Before doing this, I was soft bricked, and had to use the very original 4.2.2 software for my carrier to recover from THAT. So maybe this part wasn't as important as I think, but I wanted to mention it anyway.

- The ORIGINAL USB cable for the phone - I suspect any high quality ones would work, but the one that came with the phone is a no-brainer

- ODIN 3.xx (I used 3.09)

- Samsung USB Drivers installed properly

- NO SD CARD (to be safe - this is optional as it should not be touched throughout the process)

- DO NOT, under any circumstance, use a USB hub for this procedure. Make sure it's direct into your computer with no extensions. I also recommend a cable that is 6ft or shorter if possible, but the quality of the cable is the most important

DO IT:

1) Download the ORIGINAL firmware that came with your phone (if you weren't able to determine this, I'd say the most recent one should be safe to flash, unless you softbricked while on 4.2.2 or 4.3 - in that case I would stick with the corresponding version, though I'm not sure how it would be affected since I didn't run into this)

2) Extract the file (I use 7Zip) and ensure there is one .tar.md5 file as a result - do not extract again

3) Boot up the phone into Download Mode (PWR off completely, then hold VOLDOWN + HOME + PWR together until the warning appears on the screen - click VOLUP to accept and proceed)

---PHONE WIPE---

This part is optional but I highly, highly recommend it.

4a) Flash Philz CWM (you can find the file and instructions on how to flash it through ODIN very easily)

4b) After flashing, it usually reboots into recovery. If it does not, do so manually: turn off the phone completely (hold the power button until the screen goes black) then quickly press the VOLUP + HOME + PWR buttons. When you feel a vibration, release the PWR button but KEEP HOLDING VOLUP + HOME. Keep holding those two until you see the phone turn off and come back on.

4c) Make sure you close ODIN once confirmed the flash is done

4d) Tap factory reset and confirm it

4e) Once done, choose the clean ROM install option and confirm that as well

4f) Reboot the phone and continue on with the steps

NOTE: if there is anything to backup, now would be a good time to do this.

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5) Open ODIN (IMPORTANT: In Windows, right-click and choose "Run as administrator" - this helped avoid an error for me)

6) Connect your phone directly to a USB on your PC and confirm that ODIN recognized it (it should highlight the first box and have "COM#" listed)

7) Click the second section (AP / PDA) and choose the .tar.md5 file you got in Step 1

***NOTE: ODIN may look like it's freezing or hanging here - IT IS NOT, BE PATIENT - it is a large file and it will take a bit of time to verify the MD5 for it

8) Click Start and sit back - it should take 8-10 mins or so (8:55 for me) with KitKat, and 5-7 mins or so with JB.

9) Your phone should have rebooted into a fresh Firmware. If you hear the Samsung boot sound, GREAT! You should be good (test WiFi and Bluetooth if possible) and you're done. Assuming that's not the case, which is why you're here, proceed to the next step

***If it's stuck in a bootloop, you need to force Recovery mode and do a factory reset. To do this, turn off the phone completely (hold the power button until the screen goes black) then quickly press the VOLUP + HOME + PWR buttons. When you feel a vibration, release the PWR button but KEEP HOLDING VOLUP + HOME. Keep holding those two until you see the phone turn off and come back on. Use the VOL buttons to scroll to the factory reset option, and choose PWR to select. Then confirm on the next screen. Once that's done, wipe cache in the same way. Then, reboot, again in the same way. Now your phone should boot up

10) Go through setup and then go into Settings > More > About device. Observe the "Baseband version" section, and see if it matches the "Build number" section (starting from I337 and onwards). IF THEY MATCH, then repeat steps 5-10. IF THEY DO NOT MATCH, continue.

11) Download the matching modem file - ENSURE that the version of the modem you download MATCHES EXACTLY with the "Build number" in your phone's settings. Flash the file in ODIN in the AP / PDA section (if you need detailed instructions on this, it's a snap to find in XDA or Google)

12) Once done, reboot into the regular OS and verify that the "Baseband version" and "Build number" sections MATCH. If not, try to flash the modem again. After this has been verified, go ahead and follow steps 5-10 as many times as necessary until you hear that beautiful boot noise! It took me twice.

All the best and happy flashing guys! I'm not too much of an expert, just very good at explaining things, but I'll try to help as I can with any questions!

THANKS:

- All the great help thanks to input from around XDA in this thread (also listed in the beginning of this one): http://xdaforums.com/showthread.php?t=2559693

- All the devs that work hard for us Canadian and AT&T guys over here