yashsingh1/xdaforums huggingface dataset:
[AT&T Samsung Galaxy S 4 General] RockRatt:
Thanks for helping as I might be wrong here, but the part I quoted from his post tells me he has 4.4.2 NC1 which he just rooted. Am I wrong and CWM works with NC1 after using TowelRoot (again I am guessing he used TowelRoot since he says he just rooted it, so guessing he didn't have MDB or MDL firmware originally).

Sent fron I337 Red BadAss Themed ShoStock 7.0
[AT&T Samsung Galaxy S 4 General] ozmoore:
I did use towel root and then when getting CWM there was a problem in the Terminal Emulator so i guess i dont have CWM but i tried using the Rashr app
[AT&T Samsung Galaxy S 4 General] Dillsnik:
Forgive me if you are seeing this somewhere else, but really hoping to resolve this issue

I have an ATT S4, on MDL bootloader, rooted and running Danvdh-GE-4.4.4-06272014 version ROM.

I have been sporadically experiencing full signal loss, for a long while now, and have flashed every radio I could find, so I am hesitant to believe it is just that I need to flash a new radio as others have said.

I also have recently swapped out my Sim for a new one, just to rule that out.

I also notice my "preferred network type" in mobile network setting changes from time to time, even when I set it to GSM/WCDMA auto. Not sure this has anything to do with my problem or that's normal but really want to resolve this, so whatever it takes to fix this please any advice appreciated. Thank you!

Also I am in good LTE area (NYC region) would love to get this fixed BC tired of keeping to H+ signal

Someone suggested flashing via Odin, wondering if that might make the difference or not
[AT&T Samsung Galaxy S 4 General] RockRatt:
First off I haven't personally tried that ROM. Have you tried other Roms to see if the issue persist?

If you do decide to flash to Odin and start over just make sure to root and install recovery immediately so it doesn't start to update. It could help to flash back to pure MDL stock and and then delete/freeze the ATT update files. Then see if this fixes the issue. Then I would say next to try a stock based custom firmware and see how the signal is for you. This way will rule out a hardware issue. Then if you decide to flash back to your original Danvdh ROM GE ROM and see if it persist.

You can also try any modem you would like as some can give better reception than other modems.

Sent fron I337 Red BadAss Themed ShoStock 7.0
[AT&T Samsung Galaxy S 4 General] reade0871:
On Dan's ROM you have to set the mobile preferred type to LTE then reboot and then repeat and reboot for it to stick. This is due to older bootloaders. Try it.
[AT&T Samsung Galaxy S 4 General] Dillsnik:
I will try, although not sure this is entirely related to the signal drop issue.

There are three options with LTE. Which one should I select?

LTE/CDMA/EvDo/GSM/WCDMA

LTE/GSM/WCDMA

LTE/CDMA/EVDO
[AT&T Samsung Galaxy S 4 General] reade0871:
One thing at a time. Try the LTE gsm wcdma setting. Make sure LTE shows up in the mobile data setting after you reboot.
[AT&T Samsung Galaxy S 4 General] Dillsnik:
So it seems like that trick worked to keep the LTE/GSM/WCDMA mode the selected setting at startup, but what appears to be happening is that when it's in (any) LTE mode I get no signal. Then it forces itself into GSM/WCDMA (auto) mode and I get H+ typically. So i wonder if the signal drop issue I am having is because the phone is trying to go to LTE network mode and not getting a signal, then it eventually reverts back to the GSM/WCDMA? Either way i am tempted to just try a new ROM and see if that fixes it
[AT&T Samsung Galaxy S 4 General] Dillsnik:
i think this is exactly where i am at at this point. i'm going to search for the MDL firmware now to DL and flash via ODIN. do you know if there's a good guide on doing what you were saying, root immediately, then delete/freeze so i don't have it update? also, i've looked at a bunch of ROMS and not exactly sure how to know what a stock based one is?

Thanks so much for the help in this problem. been living like this since feb!
[AT&T Samsung Galaxy S 4 General] dirt:
I used this thread last time I odined back to stock on mdl bootloader.

---------- Post added at 01:10 PM ---------- Previous post was at 01:02 PM ----------

sorry forgot the link.

http://xdaforums.com/showthread.php?t=2297900

this is a stock i9505 based Rom I help with:

http://xdaforums.com/showthread.php?t=2391142

latest link is on last page of the thread
[AT&T Samsung Galaxy S 4 General] :
I love it when someone else does that, hate it when I do it--;) :)
[AT&T Samsung Galaxy S 4 General] chmcke01:
Best modem for rural Kentucky?

I live in rural Kentucky and I have been having a lot of signal issues when my wife has good signal on her AT&T iPhone 5. I often don't have enough signal to make or receive calls even at home and at our new house we are building while my wife and friends who also have AT&T phones have little to not issues. Occasionally I will have issues receiving MMS even when I have 3 or 4 bars.

Can anyone recommend a modem that might work better for me?
[AT&T Samsung Galaxy S 4 General] TornSack:
Advanced Wiped x3 and reset to factory in TWRP, flashed MDB mode and Odin'd back to original stock MDB ROM. Let sit for an hour, then flashed back to stock NC1 TW ROM & Modem. Modem hang in less than a day...anyone else have any ideas how to fix these modem hangs? I don't have any ideas left :(
[AT&T Samsung Galaxy S 4 General] colorchange:
I have a i337 running on T-Mobile with an mk2 modem, aws mod. Should I bother to upgrade the modem? Don't want to lose aws.
[AT&T Samsung Galaxy S 4 General] Product F(RED):
If everything's working fine as-is, an upgrade won't do anything for you. I used to be in the same situation as you.
[AT&T Samsung Galaxy S 4 General] v941726:
I was wondering the same thing. I have Tmobile and I drop signal all the time. Very annoying. So I have been wondering if it has been the modem or the tower. Anyone know what the latest modem is?
[AT&T Samsung Galaxy S 4 General] Product F(RED):
The AWS mod won't work past MF3 on the i337.
[AT&T Samsung Galaxy S 4 General] colorchange:
Thanks Fred, that's what I thought.
[AT&T Samsung Galaxy S 4 General] dbg11235:
Compatibility

I am currently running a 4.4.4 custom ROM. I have the original 1337UCUAMDB modem installed (haven't upgraded it since I bought the phone). The last month I have lost almost all signal at my house and plan to to update the modem to see if it could resolve the issue. My question is: does it matter which one I choose? I understand that I may have to try a couple to see which works best for me, but is there any reason that one of the newer modems would be incompatible? Thanks in advance!
[AT&T Samsung Galaxy S 4 General] dirt:
it's not that they will or may be incompatible, but some modems work better in some areas than others.
[AT&T Samsung Galaxy S 4 General] dbg11235:
I flashed the latest modem and have had no errors so far. Unfortunately, my lack of signal issues in the house were not resolved :( That being said, when outside my service appears to be great (almost full bars). I'll keep looking for the source of the signal interference/loss (AT&T claim all things on their end are fine). Thanks for the modems and this thread!
[AT&T Samsung Galaxy S 4 General] chmcke01:
Same here

I am having a very similar issue, and like you AT&T is saying it is not their problem. In their defense, my wife has an AT&T iPhone 5 and has no signal issues at my house whereas I bounce between having 0 and 1 bar. I did notice a SLIGHT improvement when I flashed the MJ9 modem but very little. It will occasionally even go into "No Signal" when there should be signal and about 25% of the time it starts working again on its own but about 75% of the time a reboot of the phone fixes that. I have tried different ROMs, different modems, etc but nothing has seemed to fix the issue. As of now I am just planning to keep testing out modems while I wait until I can afford to get a new phone.

Not sure if this is the issue, but a lot of people have told me that the SGS4 does not have dual antennas like many newer devices like the SGS5 have and getting one that does have dual antennas would resolve the issue. I guess I will find out when I get a new phone.
[AT&T Samsung Galaxy S 4 General] dbg11235:
The instant I step out of my door I have full bars. In fact, I can stand outside my bedroom window and have perfect reception, then move inside the same window and not even be able to make emergency calls. I'm at a loss. Anyway, it isn't the topic of this thread so I'll stop. If I find a solution I'll pm you.
[AT&T Samsung Galaxy S 4 General] bigal1542:
I would love to know if there is a solution found as well. Thanks!
[AT&T Samsung Galaxy S 4 General] Guedeaux:
Alternate download locations?

None of the links work for me. Is it something on my end or are these modems available elsewhere? Thanks.

Nevermind, the links are working now...
[AT&T Samsung Galaxy S 4 General] tailgunner9:
NC1 worked for me.
[AT&T Samsung Galaxy S 4 General] MrPeeta:
Recently, flashed to stock NC1 through ODIN. Having issues with network connection...

Is it necessary to Wipe the phone prior to flashing?

Or is the problem just the matter of which modem works best for your phone? Therefore, flash to the best modem for your phone?
[AT&T Samsung Galaxy S 4 General] jd1639:
Don't do any wipes when flashing a modem. Every situation/phone is a little different so you'll have to figure out what modem works best for you.
[AT&T Samsung Galaxy S 4 General] Venom0642:
Here's Latest flashable I337_UCUFNI1_Modem Thanks to [MENTION=2799235]RockRatt[/MENTION] For flashable Script [MENTION=4708661]muniz_ri[/MENTION] for the system dump and tar, Link to Flashable AT&T I337 UCUFNI1: https://www.androidfilehost.com/?fid=23622183712473590
[AT&T Samsung Galaxy S 4 General] RockRatt:
Thanks Venom for extracting and packaging the modem for all of us, Thanks Muniz_ri for the system dump. I will put the modem in the OP with Thanks to you both.
[AT&T Samsung Galaxy S 4 General] mugsy77:
Thanks folks! Please report back on what you all think of new modem. I will be trying it out soon as well :)
[AT&T Samsung Galaxy S 4 General] Venom0642:
Well so far for my area seems faster better network even battery seems to last a bit longer using Adam Kernel v2.5

Sent From My Galaxy S5 SAMSUNG-SM-G900A Running On New Deadly Venom v4.0.0 KitKat 4.4.2
[AT&T Samsung Galaxy S 4 General] RockRatt:
In case I didn't mention it previously the NEW NI1 Modem is in the OP.

All modems are saved in my DevHost account. Thanks were given where due. Thanks again
[AT&T Samsung Galaxy S 4 General] pulkitjeel:
Hi,

I have NC1 stock ROM (rooted by towelroot). Can I use the flashable I337_UCUFNI1_Modem by RockRatt to update my phone to NI1?

Thanks
[AT&T Samsung Galaxy S 4 General] jd1639:
No, you can probably update the modem but not the firmware.
[AT&T Samsung Galaxy S 4 General] legaltender:
Can I use the NI1 modem with the NC1 AT&T modules? or do I have to use the NI1 modules. I am rooted and have not upgraded, but would like to upgrade my modem.
[AT&T Samsung Galaxy S 4 General] jd1639:
You can try to flash the modern in safestrap. It may work better for you, it may not.
[AT&T Samsung Galaxy S 4 General] legaltender:
Do I also need to flash the NI1 modules?
[AT&T Samsung Galaxy S 4 General] RockRatt:
Thanks [MENTION=4858937]jd1639[/MENTION] for being on top of all the questions. I do follow the thread and see you have answered before I got a chance to. So a BIG THANKS for the help in here.
[AT&T Samsung Galaxy S 4 General] sanriver12:
what region does I337_UCUFNI1 belong to?
[AT&T Samsung Galaxy S 4 General] Cusa:
I'd like to know this as well.
[AT&T Samsung Galaxy S 4 General] colorchange:
I have the NI1 modem installed. I'm trying to run Sickness 4.4.4 and the radio won't work right. It seems it needs a 4.4.4 modem. What version is this modem and any thoughts on when a 4.4.4 modem might show up? Or does anyone have other suggestions?

TIA
[AT&T Samsung Galaxy S 4 General] beast3300:
It's a 4.4.2 modem. I'm using the NI1 modem on a CM based MiUi with no problems.
[AT&T Samsung Galaxy S 4 General] :
http://www.att.com/esupport/article.jsp?sid=KB419415&cv=820#fbid=lExH4y6TRbV

---------- Post added at 11:19 PM ---------- Previous post was at 11:17 PM ----------

I have ran these radios on 4.4.4 roms with no issues. :good:
[AT&T Samsung Galaxy S 4 General] Angelpirate:
call me a noob

i'm having trouble with the mobile data on my phone can't get it to work somehow checked all my setting and i'm sure when i went back to stock i must have lost something. so my question is do i have to be rooted to flash these or can i use root recovery? sorry if this is a dumb question just got into this recently.
[AT&T Samsung Galaxy S 4 General] mariom326:
Links down?
[AT&T Samsung Galaxy S 4 General] RockRatt:
Which one are you trying to download? I just tried the top 4 links and they worked. Possibly the Devhost site doing maintenance, try again and let me know.
[AT&T Samsung Galaxy S 4 General] RockRatt:
NEW 4.4.4 Modem download link in OP. Thanks to Muniz_ri for uploading a rooted NJ4 rooted ROM for us. I downloaded and then packaged it into a flashable zip. NJ4 4.4.4 MODEM DOWNLOAD LINKhttp://d-h.st/V7Oi
[AT&T Samsung Galaxy S 4 General] beast3300:
You guys are awesome!!! Is this link down?
[AT&T Samsung Galaxy S 4 General] frmorrison:
Can you upload this file again? Your link says file not found.

Edit: Thanks, here is link http://d-h.st/V7Oi
[AT&T Samsung Galaxy S 4 General] RockRatt:
Sorry not sure what happened? I tested it out first. Went back to dev host and it was not there. Uploaded again, OP was updated as well. Try this link out http://d-h.st/V7Oi
[AT&T Samsung Galaxy S 4 General] ms.journie:
I flashed this modem and is it still suppose to say 4.4.2?
[AT&T Samsung Galaxy S 4 General] beast3300:
Android version is independent of modem version. Look at baseband, that is your modem software installed. NJ4 is the newest modem.
[AT&T Samsung Galaxy S 4 General] Jose0726:
Can i flash modem with mobile odin?

Btw what modem can i use for a 4.4.4 rom. I flash atnt ones and it didnt stick so i imagine it was because i need an i337m modem
[AT&T Samsung Galaxy S 4 General] RockRatt:
These are the only for the ATT model i337. The i337m needs a tar file I believe to flash in Odin. I think I read that you need to flash them twice for them to stick? There is another modem thread that mainly deals with the i337m. I created this thread since those of us that have the ATT I337 Flash with custom recovery. I do not know why that is but something must be different.
[AT&T Samsung Galaxy S 4 General] nthrwr:
NJ4 modem EXE??

Is there a reason why the NJ4 is only availabe here as an .EXE file? I'm unable to flash it from a TWRP-based recovery program. Not all of us are Windows users either. Can we please have a version of this made available as a regular .zip file, as all previous modules have been?

Thanks,
[AT&T Samsung Galaxy S 4 General] RockRatt:
It isn't an exe file. They are flashable zip for twrp. You probably clicked on the wrong download button. ALWAYS choose the small download button
[AT&T Samsung Galaxy S 4 General] RockRatt:
When using Dev-Host site ALWAYS choose the smaller (black) Download Button as pointed to in this crude arrow pointing to it in the screenshot
[AT&T Samsung Galaxy S 4 General] gorgy76:
I downloaded the nj4 modem 3x already but only get 20mb of file while it says 22mb from the description itself. Tried installing and failed 3x.
[AT&T Samsung Galaxy S 4 General] RockRatt:
How are you downloading it? I just downloaded directly from the link in the OP from my phone STOCK browser and did get the 22.43 MB zip file as seen in the screenshots. Try another browser and see how it goes. I downloaded it on mobile data, stock browser on my phone. Also check the MD5 of the file as listed on the dev-host site, then check the downloaded files MD5 on your phone and make sure it matches. The MD5 should be 943a4672823c092b2a54806c5514bff6
[AT&T Samsung Galaxy S 4 General] RockRatt:
I use Root Explorer, long press on file, choose properties, wait until the MD5 shows up
[AT&T Samsung Galaxy S 4 General] gorgy76:
All is well now it's the dolphin browser causing the issue. I used Chrome and redownload again and got the whole 22mb of files. Thanks for the tip. Will thanks later when i get on my laptop as there is no thanks button in the phone browsers. ?
[AT&T Samsung Galaxy S 4 General] mf1tym:
I brought my ATT I337 S4 (Rooted on GE45, bootloader MDL, baseband version UCUAMDL ) to Taiwan using Chunghwa Telecom's 4G LTE service. Upon doing a speed test I was only getting 7mb-11mb download. While at the same time my Note 4 locally bought, was getting 40mb-50mb of download speed.

I thought it might need to update to a new modem and did so. I tested the NC1 and NI1 modems but was still only getting 7mb-11mb of download speed. Is this because these modems are specifically for the AT&T network? Should I try the modems for the international S4 I9505? Or there is something else I missed?

Update:

I am trying to Odin flash the international modem XXUGNG2 via Odin, but it said failed every time. Can someone help me make the XXUGNG2.tar file into a twrp flashable zip?
[AT&T Samsung Galaxy S 4 General] iBowToAndroid:
1. Don't flash a modem not meant for that model.

2. The speeds on the ATT phone are likely slower because it's not picking up LTE. I doubt that ATT and Chungwa use the same LTE frequencies
[AT&T Samsung Galaxy S 4 General] mf1tym:
You are right. I just checked, AT&T's LTE band is 17 (700mhz), 5 (850mhz), 2(1900mhz), 4 (1700mhz/2100mhz), and Chunghwa uses band 3 (1800mhz C15)

So is there no way to add the 1800mhz frequency to the AT&T modem flash file?
[AT&T Samsung Galaxy S 4 General] RockRatt:
Nope. The 1800 MHz is an actual HARDWARE issue for you that we probably do not have the correct hardware inside to get the 1800 MHz frequency. I do not remember if the i337 does not or does support the 1800 frequency though. If it does it would need to be turned on in the hidden settings configuration (the settings that are used by the secret dialer codes). But I would bet ATT didn't have the 1800 frequency hardware installed since it wouldn't benefit ATT network at all.
[AT&T Samsung Galaxy S 4 General] mf1tym:
Thank you for this information. I guess this means my S4 is rendered almost useless here in Asia not being to go on their band3 LTE network.

I am looking at the AT&T S5 right now, and it seems like band 3 is part of the LTE spec on it. So the AT&T S5 should be able to get on the LTE network here correct?
[AT&T Samsung Galaxy S 4 General] pastafarian92:
Nevermind, it's working now.
[AT&T Samsung Galaxy S 4 General] ehafling:
I believe I'm fairly caught up but I'm being overly cautious because I want to keep my MDL Bootloader.

I saw "IF you are on MDB or MDL BOOTLOADERS then flashing these modems will NOT effect your ability to flash anything or change your bootloader." on the very first post.

Are there any other known issues after flashing the NJ4 modem with an MDL bootloader device?
[AT&T Samsung Galaxy S 4 General] beast3300:
None. I'm doing this right now. None of the modems have given me any trouble. Battery life and or performance is questionable. I think NB1 may be slightly better for me and battery life but I'm still on NJ4.
[AT&T Samsung Galaxy S 4 General] juju2011:
Are these modems odin or twrp flashable??
[AT&T Samsung Galaxy S 4 General] skipdawg02:
Twrp
[AT&T Samsung Galaxy S 4 General] scloutkst:
Should be able to flash them in any custom recovery.
[AT&T Samsung Galaxy S 4 General] juju2011:
Just did... Didn't work
[AT&T Samsung Galaxy S 4 General] RockRatt:
What recovery do you have? If it is not TWRP/CWM then look at the safestrap way posted in the OP. I do not have safestrap.
[AT&T Samsung Galaxy S 4 General] juju2011:
I have twrp but i my phones not att I'm jfltecan think I'm most up-to-date one for my country
[AT&T Samsung Galaxy S 4 General] RockRatt:
These will ONLY work for the i337 and NOT for the i337m or 9505 versions. It should check to MAKE SURE you do not flash them on the wrong phone.
[AT&T Samsung Galaxy S 4 General] juju2011:
Yah what I figured I found my carriers stock rom but my modem is different from it ... Stock says ni2 and I'm ni1 but men don't feel like going stock thx tho

..thought would work my note flashed att modems and Roms no problem lol when I had it oh well
[AT&T Samsung Galaxy S 4 General] brooklynite:
These will ONLY work for the i337 and NOT for the i337 or 9505 versions. It should check to MAKE SURE you do not flash them on the wrong phone.[/QUOTE]

My S4 is:

I337UCUFNJ4 baseband

Rooted.

Safestrap 3.75 installed.

Installed GOLDEN EYE 47 BY iB4STiD XXUGNK2 Rom

(USA AT&T) 4.4.2

and I want to bring back the service menus so I can SIM UNLOCK the phone. Region Lockaway doesnt work, neither do the menus show up when the codes. I need to go back to NB1 so I can SIM UNLOCK using THIS method.

My question is, can I flash the NB1 rom shown in the image below using SAFESTRAP? If yes, I understand it wont flash the MODEM and I have to do that separately, so which model should I pick? I noticed some of these ROMs are HUGE in size and some are just KERNELs I guess and are tiny files so now I am very confused!

Appreciate your HELP!

[IMG="NB1 Rom"]http://i.imgur.com/ZElorKk.jpg[/IMG]
[AT&T Samsung Galaxy S 4 General] RockRatt:
My S4 is:

I337UCUFNJ4 baseband

Rooted.

Safestrap 3.75 installed.

Installed GOLDEN EYE 47 BY iB4STiD XXUGNK2 Rom

(USA AT&T) 4.4.2

and I want to bring back the service menus so I can SIM UNLOCK the phone. Region Lockaway doesnt work, neither do the menus show up when the codes. I need to go back to NB1 so I can SIM UNLOCK using THIS method.

My question is, can I flash the NB1 rom shown in the image below using SAFESTRAP? If yes, I understand it wont flash the MODEM and I have to do that separately, so which model should I pick? I noticed some of these ROMs are HUGE in size and some are just KERNELs I guess and are tiny files so now I am very confused!

Appreciate your HELP!

[IMG="NB1 Rom"]http://i.imgur.com/ZElorKk.jpg[/IMG]

Sorry I do not use safestrap but I don't think you can flash a Odin tar via safestrap. That should be flashed via Odin most likely. Also what I did was flash the MF3 modem and then have the service menu back. If I remember correctly I had to use #9090# or something close to that. There is a thread in the i337 forums that I read through and tried each code until it worked for me (Again I have the MDB Bootloaders though). Then I flashed back to a newer modem.
[AT&T Samsung Galaxy S 4 General] brooklynite:
Sorry does MDB mean the last 3 characters on your BASEBAND version are MDB?
[AT&T Samsung Galaxy S 4 General] StoneyJSG:
Heyo! I am also on the MDL firmware sgh-i337 at&t. Do you recommend flashing the NB1 modem for battery life?
[AT&T Samsung Galaxy S 4 General] RockRatt:
Yes. It was the original firmware that came with the S4, then within a few weeks we got MDL firmware. I had already rooted and flashed twrp recovery so my device is not nearly locked down thanks to the loki-doki boot loader bypass.
[AT&T Samsung Galaxy S 4 General] beast3300:
You can try them all!!! From what I've read they say some modems perform better in different regions. Flashing stuff is fun.
[AT&T Samsung Galaxy S 4 General] StoneyJSG:
Oh okay, thanks. This won't affect anything will it? Like mess up my IMEI or APN settings or the loki hack?
[AT&T Samsung Galaxy S 4 General] beast3300:
Yw! [emoji1] [emoji1] nope! Happy flashing!!
[AT&T Samsung Galaxy S 4 General] brooklynite:
I am on NJ4, can I flash any MODEM right on my ROM? I mean if the ROM doesnt support it I know I have to install a different ROM.
[AT&T Samsung Galaxy S 4 General] reade0871:
Modem is independent of ROM
[AT&T Samsung Galaxy S 4 General] tailgunner9:
Can you flash NJ4 Modem to replace my NB1 or any modem from SD card? Or must it be done from rooted phone with TWRP or CWM??