Ok im new to this site but not to new to root and flashing. Ok so here is what I have done. I rooted my S4 when i got it and everything was fine. Then when the 4.2.2 came out I updated it straight from my rooted s4. After so my 4G LTE for some reason has been cut in half. I always get a speed of 20 to 35 mb download at my house but after update I can only get up to 10mb. I tried last night to flash back to previous build or firmware but did not have any luck. So I flashed to stock firmware that the update came with (ME7) and then rooted it again but I still cant get speeds over 10 or 11 mb. I have another LTE phone side by side and the other gets over 20mb. Is there anything like flashing modem or anything else I can do to get my S4 to preform as it did before the update.
A few days ago, the wifi connection to my Verizon Note II stopped working. I see a strong signal from my router, and it attempts to connect, but inevitably gets "Authentication Error". It did the same thing with other networks, so it's not just my home wireless.
This is a well-known problem with 4.1.2 - and has been for a while. Google it. I did, and quickly went down a rabbit hole, leaving me frustrated, confused and still no closer to a fix. So I installed a 4.3 ROM, which also required an updated firmware.
I was using Jelly Beans 22 (http://forum.xda-developers.com/showthread.php?t=2032447)
I wiped everything and installed JellyWiz 4.3 (http://forum.xda-developers.com/showthread.php?t=2564495) with TWRP and VRUEMJ9 WIfI Firmware via Odin.
And still the error persists.
F** it. I'll jump to KitKat.
So I wiped everything again, updated TWRP, and installed Gummy (http://forum.xda-developers.com/showthread.php?t=2592339)
STILL NO WORKING WIFI. Same "Authentication" error
In between the above steps, I have tried literally everything I could find to fix this problem. Restarting my router (duh), changing settings in the wifi menu, the hidden "service mode" menu, energy saving, even dropping the /etc/wifi directory and replacing with a copy from 4.1.1.
What silly, stupid, inane detail did I miss?
SCH-I605
Android Version 4.4.2
Baseband I605VRUEMJ9
Kernel 3.0.64-gummy...
Have you updated to the mj9 firmware?
Fine. I'm done dealing with this, I thought, and nuked the phone back to the stone age.
Using Odin and instructions here: http://forum.xda-developers.com/showthread.php?t=2024207 I flashed back to 4.1.1 and a full factory reset.
Still. No. F***g. Wifi.
I have now spent the entire weekend upgrading and downgrading my Note II, to no effect. I'm almost *almost* convinced it's a hardware problem. If it didn't match so many other examples of a 4.1.2 wifi bug, to a T.
Anyhow, to the Verizon store I shall venture on the morrow, and demand satisfaction.
Kil4Thril said:
Have you updated to the mj9 firmware?
Click to expand...
Click to collapse
Yep. As part of flashing to 4.3 and Jelly Wiz.
No dice.
Did you use Odin or the flashable zip? ONLY the Odin method works. I tried using the zip, and while my phone said it was on mj9, it didn't update anything but the modem. This left me unable to use my WiFi on anything over 4.1. I hope this can be of some help
I was perfectly happy with my VZ S3 running cleanrom 7 until samsung pushed an update through. I have TWRP on the phone. I can't install the update. Verizon points at Samsung and vice versa. Anyway I gave up on trying to find the file name for the update notifier. I tried a factory update and it failed. Now I have to reinstall all my apps. Or rather I have to put them on the screen again..they're still there. I first tried just installing the update through the notifier that popped up. No joy. I was offered "send it in" but with my phone rooted and running a custom rom and theme I don't think letting some Verizon or Samsung tech in is a good idea. I'd like to get 4.3 but it's a real nuisance so far. How can I get the update installed or gone? (either will work for me)
Alright guys, this is gonna be kinda long so get ready. I was running stock 4.4.2 NEW and I saw that there was a way to get GPE 4.4.3 and 4.4.4 rom working on the s4. I followed all the instructions on RickGrimes's post and wifi didn't work. Not and big deal. I couldn't soft reboot, so I tried flashing gogolies nc2 wifi fix and this modem worked. I then tried to update to 4.4.4, also following the instructions and the wifi didn't work once again. I flashed gogolies nc2 wifi fix again but it did not work. I also realized that I had no service at all and that I couldn't send or receive any messages or calls. So I did the safe thing and used Odin to get back to stock. I am currently running stock but the service is still terrible in places where I usually get great signal. Also, my wifi strength seemed to go down from what it usually is. Another issue is that my contacts that were backed up in backup assistant aren't there anymore at all. I generally know what I'm doing when it comes to this stuff but for some reason I have no idea how to resolve these issues. Any help will be appreciated.
Reolved
Jessooca said:
The easiest way to fix your phone or any phone for this matter is always to download and flash the stock tar file of whatever version of Android you were last on in Odin.
Then visit towelroot.com in your browser on your phone and root it again. (Don't forget to enable usb debugging first)
Click to expand...
Click to collapse
I wound up going back to stock 4.4.2 via Odin, but the problem still persisted. I figured out the my network settings were changed to Global instead of CDMa/LTE. Changed it back and all is well! Thank you though!
Device: Galaxy S3
ROM: Slimkat
ROM version: Slim-4.4.4.build.6-OFFICIAL-5242
Build: slim_d2lte-userdebug 4.4.4 KTU84P 5242 test-keys
Kernel: 3.4.95-cyanogenmod-gd56ed95
I purchased my S3 in April of last year (4.1 Jellybean), and at the time the wifi worked perfectly. After the first (or second?) OTA that was pushed to my device, my wifi started acting up. It would cut out and I would have to cycle the wifi off and back on in hopes it would work again. I have been patient hoping they would push an OTA that would finally fix it. A year or so and a few OTA (I don't recall how many, or which versions) later and it still doesn't work properly, so I decided to finally try a custom rom to see if it would solve the issue. The last stock version of android I was using was the 4.4.2 OTA.
I rooted my device using towelroot, flashed CWM Recovery (CWM_6.0.4.7_Non-Touch_GT-I9300) using ODIN 3.04, then proceeded to flash the Slimkat rom listed above using CWM recovery. The wifi seems to be better, but it still cuts out and is unresponsive even though it says I have full wifi signal. A wifi cycle seems to fix it temporarily, but I'd like to solve this issue.
So as far as I can tell the last working modem I had was stock 4.1 or so. So I guess my question is, can I flash previous modems to try to get a working one with this rom? I have tried using WIFI Fixer from play store, and even with full signal on WIFI I get signal poor, signal hop scan messages spammed. Any and all help would be greatly appreciated!