yashsingh1/xdaforums huggingface dataset:
[T-Mobile Samsung Galaxy S 4] jeffg1391:
SGH-M919: Camera Failed

Hello everyone!

My wonderful girlfriend gave me a Galaxy S4 for Christmas. (She won it at a raffle.) So far, I've been loving the hell out of the device. It's a very nice noticeable upgrade from the GS3 that I had.

When I first got it, we were able to take a single picture using the camera on the stock rom. The next time I loaded up the camera app, it would give me an error message like... "Error: Camera Failed" or "Cannot connect to Camera". I didn't think too much of this, and then promptly flashed a recovery onto it, and now I have the KOT49H 4.4.2 Google Play Rom by Danvdh. But I'm still experiencing these issues odd connection to the camera issues.

I've tried different apps. I've looked on the internet and tried the factory reset multiple times, as well as the data/cache clear followed by a reboot. Typically it will end up working, but everytime I open up the camera it feels like a gamble. I'd say offhand 70% of the time it fails, and 30% of the time it will work. It just feels inconsistent, and after numerous clears it will end up working, but it fails again when I reopen the camera app later.

TL;DR

My camera doesn't work all the time. Reporting that it can't connect or camera failed. I've tried factory resets, data/cache clears, and reflashing different roms. Nothing has worked well, what do I do?
[T-Mobile Samsung Galaxy S 4] lalec:
Download the USB drivers from Samsung (or install Kies which will install them for you). If you are using Windows 8 you may need a good deal of patience but it should work.

---------- Post added at 06:01 PM ---------- Previous post was at 06:00 PM ----------

If it was doing that on a stock ROM when you first got it your phone is defective.
[T-Mobile Samsung Galaxy S 4] jeffg1391:
:( That's what I had figured. What options for repair do I have? It's sort of a weird situation because I had gotten this as a gift. So it's not like I have warranty on the device or anything, do I? Is there a website I can refer to?
[T-Mobile Samsung Galaxy S 4] Coolmfarshard:
Can anybody share or pm me sgh-m919 qcn file revived from qpst
[T-Mobile Samsung Galaxy S 4] Misterjunky:
re: camera issues

Have you tried this?

1 (800) 726-7864

Samsung Telecommunications, Technical support

Before you call, be sure to have your IMEI number ready

and tell them exactly what the issue is like you done here

in your post.

Good luck!
[T-Mobile Samsung Galaxy S 4] nics04:
Downgrading mk2 modem to MDL

I have a T mobile s4 on MK2 baseband. Phone is rooted using safe root method. I would like to downgrade the modem to MDL for unlocking purpose, since region unlock will not work on mk2 baseband. However while flashing mdl modem I do not want to trip the knox counter. Anyone knows how to flash mdl modem without voiding warranty? Thanks.:)
[T-Mobile Samsung Galaxy S 4] Misterjunky:
re: 4.3 MK2

You will not be able to downgrade to MDL since you have the 4.3 MK2 baseband.

If you flash anything like Modem and kernel you will trip the knox counter.

All Samsung Tmobile phones which have the 4.3 MK2 firmware cannot be downgraded

even if someone does not care about tripping the knox counter.

Good luck!
[T-Mobile Samsung Galaxy S 4] bryannvee:
i did install Samsung Kies and it still doesn't connect it say " MTP USB DEVICE ---- DEVICE UNPLUGGED"
[T-Mobile Samsung Galaxy S 4] lalec:
Did you check the usb media mode setting on your phone?
[T-Mobile Samsung Galaxy S 4] fbiryujin:
I'm thinking of coming from a Verizon Moto X to the T-Mobile S4. I have a few questions though?

1) Is the bootloader unlocked on the models that can be purchased in T-Mobile stores (NYC to be precise)

2) Can I root the latest version of the stock ROM that the phone either comes with or will receive?

3) Can I disable Knox completely, or does it not matter? (Don't know much about Knox)

4) My Verizon S3 stock ROM allowed decrypting the phone once the full disk encryption was enabled. Does the T-Mobile S4 stock ROM have that same option?

Thanks
[T-Mobile Samsung Galaxy S 4] MartyrdHavok:
Okay, actually making an account here to ask a question. Everything I've ever done with both of my phones (T-Mobile Optimus T and now Samsung Galaxy S4) I've done, found answers to, and used this forum. But now I'm at my wits end. I've scoped out, looked all over, but can't quite find an answer for my issue. So here it is.

Randomly the last two days, my phone will randomly just kick on. Even if I lock screen, after a minute or two, it will light up, showing my homescreen or whatever app was recently used. If I actually had the phone set with a passcode (which I do if I go anywhere but home), it kicks on to the lockscreen to put in my code. Screen is set to turn off after 30 seconds of inactivity, then usually locks after a minute, meaning I need to swype usually to open it. But now it's on, then off again, by itself after a minute's time. If I reboot the phone, it behaves for an hour or two before starting the actions all over again.

I've deleted every 'recent' app, though others have no issues with the same apps. I tried updating *every* app I had that needed updating, even the Samsung bloatware I'd delayed updating. I am rooted, but I never uploaded a custom rom. My superuser is the clockworkmod version. I am always closing out apps after I know I'm done, and most of the apps I use have never done this before. Also, before *this* started happening, I was getting random "Shell has been granted superuser" notices. Air View is off, smart screen is off, all motions and guestures are off, voice control...everything.

Is there any apps that could show what the misbehaving app is? Short of uninstalling and reinstalling every single app I've ever used? If I do wipe and reset my phone, can I do that without unrooting it? (sorry to sound stupid, factory resets on my T never got rid of root, not sure if it does that with this phone or not). I know there's ways to backup, I've bookmarked those. I'm not really worried about apps, only pictures and contacts. The rest are superficial.
[T-Mobile Samsung Galaxy S 4] lalec:
Some ideas for you to consider:

1) I'm not bashing but I've heard the CWM version of superuser causes problems on some devices. I suggest at least giving SuperSU a try and see if that is part or all of your problem.

2) Try using BetterBatteryStats and/or Wakelock Detector to see if something is trying to wake up your phone when it shouldn't. Google is famous for keeping these phones awake constantly unless/until the user learns how to regain control of his/her phone.

Good luck.

---------- Post added at 05:17 PM ---------- Previous post was at 05:13 PM ----------

1. Bootloader is unlocked on T-Mobile S4.

2. Yes, the phone can be rooted (but on the newer phones not without tripping the Knox warranty flag)

3. No, on the newer phones Knox cannot be completely disabled. If you are somehow fortunate enough to be able to get a phone that still has Android 4.2.2 (aka UVUAMDL version) you will only have some Knox software which can be fully disabled.

4. I haven't personally tested so can't answer for the disk encryption/unencryption

Good luck.
[T-Mobile Samsung Galaxy S 4] buyslake:
modem? radio? bad cell phone reception

Hello,

I installed the vision x rom on my phone. Then downloaded some modem.rar file and updated the rom with that.

I am having trouble with my cell phone reception. It seems very poor.

Is it the modem.rar file that might have messed that up?

If I reflash the vision x rom will it replace it with a new modem?

Or please direct me to a good modem. FYI I am using my T-mobile unlocked on AT&T towers.

see attached image of phone info
[T-Mobile Samsung Galaxy S 4] bryannvee:
no i haven't can you show me how please
[T-Mobile Samsung Galaxy S 4] Skipjacks:
Uh...yeah. That could do it. Generally you want to avoid "some Modem file" and want to stick with the modem made specifically for your phone. Generally speaking...
[T-Mobile Samsung Galaxy S 4] buyslake:
If I reflash the rom, will that replace the modem I installed?
[T-Mobile Samsung Galaxy S 4] simplicityy:
Still have not received help, still stuck :c

"Okay, so I recently flashed the infamous ROM for my phone, and it was okay except that it started lagging bad. I assumed it was the ROM and had no time to fiddle with it and figure out if it was something else. I then flashed Darthstalker ROM (latest) and it was super fast and responsive at first, but after a bit of use, it started really slowing down and lagging again. I'll click on an app and it takes a couple seconds to open up. I'll be Swyping and it's almost impossible because of the lag. I'll be trying to watch pr0n on Chrome and opening up new tabs of sexy vids only to have it slow down to a stop and then reboot. Then I cried because the videos looked really sexy and I had opened them in Incognito Mode so there was no way of finding them ever again. This lag is everywhere. When I receive a text message, the notification is even lagged. Screen turns on, then a second later the sound plays. I was going to post this through my phone but when I was searching threads by typing in "lag", it took a good 20 seconds to zoom into the Typing Bar and for the actual word "lag" to show up.

I've reflashed a bunch of times and each time, it kills me because it takes me forever to re-set up my phone. I have an application called Fast Reboot and I do it often now and it sort of helps at first but then the lag starts up immediately or a minute later. Obviously, I do not think the ROM is the issue (I don't think at least). Is it an app? A service?

I haven't had the time to really sit down and diagnose the phone (Busy student who just wants to do work and fap).

I took a screenshot of what was killed during a Fast Reboot.

UPDATE:

Things I've tried now that I'm done with classes for the day:

Watchdog (nothing?)

Apps2SD (moved what I could. like 5% improvement?)

Greenify (Went on green spree. Practically almost every appropriate app I greenified )

LagFix

Nothing has really worked. Help? A slow phone is an unusable phone for me :c"

UPDATE:

I reverted back to full stock and decided to run it like this for a while. It's been hell. I hate stock. The battery life is terrible. But anyway, the aforementioned lag sort of happened here and there, but not as bad as when I had a custom ROM. In other words, I'm still confused as to what the **** is going on or what to do.
[T-Mobile Samsung Galaxy S 4] omni081977:
rom issue

Thank you all for the support. I have been trying to figure out the installation of Wicked rom and why it wont work. I tryed even without rom manager and still got the error message.........>>>> E: cant open /data/media/0/download/wicked v10 bad. any suggestions would be great. rom suggestions to try while im working on this. Thank you
[T-Mobile Samsung Galaxy S 4] SaintCity86:
Hey guys can someone help me with this,

I got a 32gb micro sdcard that is giving me issues when trying to write to it or delete from it, after the phones been on for a minute or so.

For the first minute, I can delete stuff just fine.

Seems like once I've got like 3 gigs of stuff on it, it'll start failing. Anything I can do other than format it.

Tapatold from my tricked out TmoGalaxyS4 running: ♧♢dbombROMv3beta♤♡
[T-Mobile Samsung Galaxy S 4] Sakete:
What brand is the SD card you're using? SanDisk by any chance? If so, you might want to consider replacing/exchanging it with a Samsung card. I also had a SanDisk SD card at first, but that kept giving me issues. Exchanged it for a Samsung, no problems whatsoever.

Apparently, SanDisk has been having some Quality Control issues lately.
[T-Mobile Samsung Galaxy S 4] fbiryujin:
Thanks! I'll look into what Knox actually does. Kind of torn between this and a Nexus 5
[T-Mobile Samsung Galaxy S 4] SaintCity86:
No, actually its a samsung 30mbs 32gb one. Cuz I did have problems with SanDisk too, anything over 16gb with them. I've formatted it multiple ways. It's junk. I've got the worst luck with these damn things

Tapatold from my tricked out TmoGalaxyS4 running: ♧♢dbombROMv3beta♤♡
[T-Mobile Samsung Galaxy S 4] SaintCity86:
Anybody have any suggestions as to what brand card I should get when I hit best buy?

Should I still roll with the Samsung card for the Samsung phone? What do you guys have in yours?

Tapatold from my tricked out TmoGalaxyS4 running: ♧♢dbombROMv3beta♤♡
[T-Mobile Samsung Galaxy S 4] bsquirrell:
s4 m919n

So this is probably a really stupid question, I have unrooted the Metro pcs version of the Galaxy S4, which I elieve is the same as the T mobile version, Can I install an international version. IE the I 9505 rom, and the radio still work.? Any help will be greatly appreciated:confused:
[T-Mobile Samsung Galaxy S 4] dannyyyyy:
Hi does anyone know if there is a way to root the tmobile s4 thats already on stock 4.3 mdk? Without voiding warranty?
[T-Mobile Samsung Galaxy S 4] SaintCity86:
Soon as u root, u void. No getting around that.

Other than unrooting before you send it in, there are a couple other steps to change it back I can't recall, maybe someone else can? You'll need triangle away I think.

If you pay for insurance though, it doesn't matter if u root. I don't know about yall but I pay that 11 bucks

Tapatold from my tricked out TmoGalaxyS4 running: ♧♢dbombROMv3beta♤♡
[T-Mobile Samsung Galaxy S 4] Misterjunky:
re: modem

Your existing radio will work just fine with a i9505 rom.

None of the CWM/TRWP flashable roms contain the radio/modem image

so when you flash a i9505 or M919 rom you always keep the radio/modem

which you already have in the phone.

Good luck!
[T-Mobile Samsung Galaxy S 4] ssanuibsss:
Thanks for the info. I did actually end up rooting my phone a day or two after you posted this and after I had gotten some sleep. It turns out I had no knox so I didn't actually have to worry about it. CF Auto Root was super easy to use also thanks.
[T-Mobile Samsung Galaxy S 4] omni081977:
4.3 question

is the 4.3 worth upgrading? if so how do I get it? I couldnt seem to find the thread with instructions. ....my phone is tmobile m919 rooted 4.2.2 w cwm. Any help wo I ld be greatly appreciated. ...

---------- Post added at 08:40 AM ---------- Previous post was at 07:56 AM ----------

can i use super user full unroot bring me back to be able to update to 4.3 and can I reroot after I update. Super user says full unroot permanent which is why im asking thank you
[T-Mobile Samsung Galaxy S 4] Fleetknight:
I just called Samsung to get an update on the repair status for my S4 (screen had AMOLED burn-in) and was told that since the device was rooted they will not be supporting it (despite the fact that I unrooted with SuperSu and did a factory reset), but I guess they still found out it was rooted anyway (It was Android 4.2.2). So I lost a week of my phone usage, all my data, and my screen will still be screwed up. Sucks but I took the risk rooting my phone anyway so it is what it is. I'll just have to spend some time getting back my data and deal with the burn.

For future reference, does anyone have any recommendations as to what changes I can make to my home screen to reduce the odds of more burn? The burn-in is located where the Green phone icon sits and located at the top where the black navigation bar meets the rest. Also, should I update to Android 4.3 when my phone comes back? Not even sure how I would do that since apparently it failed to unroot.
[T-Mobile Samsung Galaxy S 4] lalec:
Not sure its a good idea to format an SD card several times or several different ways. According to the "All about SD CARDS..." thread, reformatting an SD card may make the card slower or shorten its lifespan. Source thread:

http://xdaforums.com/showthread.php?t=1947560

I've got three different Sandisk microSD 32GB and 64GB cards in use at the moment and have never had a problem with any of them.

---------- Post added at 04:36 PM ---------- Previous post was at 04:34 PM ----------

The insurance sold by the carriers is not really that good when you consider how expensive the deductible is. Personally, I use the free insurance provided by my credit card which gives me full replacement cost with only a $25 deductible. Not all credit cards offer this but it's worth a look to see if your bank is one of those who does.
[T-Mobile Samsung Galaxy S 4] xionide:
4.3 ota questions

I have a tmobile s4 that is currently stock 4.2. I had it rooted with a 4.3 rom and the 4.3 modem to take care of the data and wifi issues. I used the method from this thread: http://xdaforums.com/showthread.php?t=2546024

I am thinking about taking the 4.3 update to go full mk2. I purchased my phone off craigslist and the warranty is really of no concern to me. The main reason I am wanting to do the ota 4.3 update is that I believe I have been experiencing some if not all of the issues in the possible problems section of the thread I mentioned. So my question is other than not being able to downgrade back to 4.2 and my non existent warranty being voided what are the drawbacks of doing the update? Is doing the full update going to make my phone more stable on 4.3 roms?
[T-Mobile Samsung Galaxy S 4] navcty850:
Having serious problem with my s4 (tmobile)

Ok, I used Odin 3.07 to flash the Clockwork Mod recovery. then selected PDA and used the root file that was provided in the tutorial, pressed start and everything went great according to Odin. so I rebooted, and it says at the top left: KERNEL IS NOT SEANDROID ENFORCING (in red) Below that, it says (in yellow) SET WARRANTY BIT: kernel.

Can anyone tell me what is happening and where I need to go from here???

This is the tutorial I used: http://www.xda-developers.com/android/how-to-root-the-t-mobile-samsung-galaxy-s-4-xda-developer-tv/

NOTE: I recently updated my phone to android 4.3 jellybean
[T-Mobile Samsung Galaxy S 4] Skipjacks:
No. It won't be much more stable after the full update than without it.

If you are rooted with a custom recovery, which is sounds like you are, just flash whatever you want from the available custom roms. They are likely to have more tweaks, features, adn be more stable than the stock roms.

The part of the update to 4.3 that breaks warrenty is the bootloader. That's not going to have any effect on the rom performance.

The part that affects phone operation is the modem, which you've already updated to the 4.3 version. If you notice better performance on the 4.3 modem, good for you. Keep it. If you don't notice any difference, then still keep it. No reason to go back. But tha tmodem will work with all the 4.3 and 4.4 custom roms.
[T-Mobile Samsung Galaxy S 4] Skipjacks:
You used an older and outdated root method for you phone. That was made in July. In the world of cell phone modding, something from 6 months ago may as well be chiseled into stone and found by an archeologist. It's ancient. And that method is way more complicated than the rooting process is now.

Basicaly you tripped your Knox flag and killed your warrenty.

Does the phone boot? CAn you get into ClockworkMod Recovery? If so, then the the phone should work like normal, but will always have that warning, and tha twarning is the only problem.

If the phone doesn't boot and can't be used in it's current state, you need to do a full return to stock. Use Odin to flash a full stock image. it will return your phone to a brand new state, except that your warrently flag will still be tripped. After that, re-root using CF Auto Root. It takes 30 seconds and you're done. CF Auto Root will trip your warrenty flag, but you've already tripped it. So no big deal there.
[T-Mobile Samsung Galaxy S 4] lalec:
My apologies, I don't think this particular phone has that setting. Have you tried a different USB cable? If you installed Kies successfully you should have the Samsung USB drivers and if you still get connection errors the likely culprit is the cable.
[T-Mobile Samsung Galaxy S 4] Skipjacks:
To further explain this, some cheaper cables use very thin or low quality copper wire to save costs. The result is that the wire can't handle the digital signal.

A lot of wire manufacturers started this with AV cables years ago when signals were anolog. This made sense in that era as a thin wire made of low grad ecopper could carry an alolog video or audio signal pretty well. And if it did fail it would be barely noticiable.

But with digital transmissions like a USB carries, there is no such thing as 'pretty well'. Either it transmits the entire signal accurately or it doesn't. If there are errors in the transfer the device on the other end doesn't get what it needs to do its' task.

Now, this isn't to say that all cheap wires are bad. I get all my wires form Monoprice and they cost like $1 per mile or cable or something rediculous like that. They are cheap, but not bad quality.

There is absolutely no reason in the world why you should go spend $100 on a Monster USB cable or something of that nature. That's just pure nonsense.
[T-Mobile Samsung Galaxy S 4] omni081977:
wifi and rom question

I have two questions if anyone can answer. My phone is rooted and I am using wifi app. will I get charged from tmobile or does the rooting pass that and I dont know that answer and dont want to use wifi untill I know for sure. Second question is about roms....I have 4.2.2 can I use roms that are 4.3 and up because I cant update to 4.3 it wont let me cause im rooted. I even did factory reset n and still got the error message. I know these are dumb questions but I am a big noob and want the goodies xda has. Thank you!
[T-Mobile Samsung Galaxy S 4] lalec:
1. By "wifi app" I presume that you mean Wi-Fi tethering and you didn't provide enough information for anyone to tell you whether T-Mobile's provisioning checks would see you using the wireless data. Simply rooting your phone won't change any of that so the answer is probably yes, you will have to pay for it. You can use the "T-Mobile My Account" app to monitor your data usage so it should be easy to test it and see for yourself whether your tethering usage increases while you are using it.

2. Yes, you can install 4.3 and up ROMs but from your post it looks like you haven't done any research and I strongly recommend that you do some reading and know what you are getting before you do that. Once you install the Knox stuff it is difficult or impossible to revert back in a way that hides the fact you modified your phone (i.e., you may lose your warranty coverage).