Database Users

4G not working, urgent

I flashed an international firmware on a Sprint S4, not knowing that it breaks root and custom recovery. I also lost my 4G. I can fix everything except the 4G. No idea how to begin, any idea?
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Denomenance said:
I flashed an international firmware on a Sprint S4, not knowing that it breaks root and custom recovery. I also lost my 4G. I can fix everything except the 4G. No idea how to begin, any idea?
Sent from my SPH-L720 using xda app-developers app
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Well you can begin by going to Sammobile and download the carrier's stock firmware. Flash it via odin. Stay on stock until you figure out how to fix 4G on custom roms.
Good luck, Im sure you'd be able fix it by flashing stock rom

Have you tried fishing the Sprint modem?
Sent from my GT-I9505 using xda premium

chickentuna said:
Well you can begin by going to Sammobile and download the carrier's stock firmware. Flash it via odin. Stay on stock until you figure out how to fix 4G on custom roms.
Good luck, Im sure you'd be able fix it by flashing stock rom
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Alright, i'm about to attempt that, thanks!
sxi200 said:
Have you tried fishing the Sprint modem?
Sent from my GT-I9505 using xda premium
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Sprint Modem? Can you go a bit more in detail please?

Indie offers an "EnableLTE.zip in the i9505 Omega Thread
This maybe fix the problem, OR AT WORST BRICK YOUR DEVICE
Honestly i have no idea if this works, so be careful.
Indie or another skilled person should know of this fix the LTE bug on your Sprint S4.

Denomenance said:
Sprint Modem? Can you go a bit more in detail please?
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The modem is part of any full firmware and is usually different for each provider, region etc.
I believe the US lte frequencies are different to most of the other countries so if you don't have the correct modem your phone may be looking for the wrong frequency.
Try this link: http://www.rwilco12.com/downloads.php?dir=Files/Devices/Samsung Galaxy S4 (SPH-L720)/Modems
Flash the .tar file in odin in the phone section.
Edit: just remembered when the first ipad to have lte was released in Australia, Apple and resellers got into big trouble for marketing it as lte/4g. This was because although it was lte it didn't actually work with Australian lte frequencies. So as I mentioned above you will need a US modem. That's my best bet to get it going again.
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sxi200 said:
The modem is part of any full firmware and is usually different for each provider, region etc.
I believe the US lte frequencies are different to most of the other countries so if you don't have the correct modem your phone may be looking for the wrong frequency.
Try this link: http://www.rwilco12.com/downloads.php?dir=Files/Devices/Samsung Galaxy S4 (SPH-L720)/Modems
Flash the .tar file in odin in the phone section.
Edit: just remembered when the first ipad to have lte was released in Australia, Apple and resellers got into big trouble for marketing it as lte/4g. This was because although it was lte it didn't actually work with Australian lte frequencies. So as I mentioned above you will need a US modem. That's my best bet to get it going again.
Sent from my GT-I9505 using xda premium
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Flashed it successfully, yet no 4g. Could it be that I need to flash a different firmware?

Denomenance said:
Flashed it successfully, yet no 4g. Could it be that I need to flash a different firmware?
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Maybe check that lte is selected in network settings and you have your apn set correctly.
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sxi200 said:
Maybe check that lte is selected in network settings and you have your apn set correctly.
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I did, yet no dice. Would flashing a stock firmware replace the modem?
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Denomenance said:
I did, yet no dice. Would flashing a stock firmware replace the modem?
Sent from my SPH-L720 using xda app-developers app
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Please reflash your official stock firmware.
Sent from my GT-I9500

Noob question on Sgs4 Roms

Is there an Omega Rom for the I337 att ? Seen it on the international version of s4. Just wondering
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VICIOUSVIC1 said:
Is there an Omega Rom for the I337 att ? Seen it on the international version of s4. Just wondering
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Almost any I9505 ROM will work on the I337 but I have avoided going over there just incase if I would fail to make a mistake. I can't afford to lose my phone and I feel GOLDENEYE is plenty.
Tylor
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Tylorw1 said:
Almost any I9505 ROM will work on the I337 but I have avoided going over there just incase if I would fail to make a mistake. I can't afford to lose my phone and I feel GOLDENEYE is plenty.
Tylor
Sent from my SAMSUNG-SGH-I337 using Tapatalk 4
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Really am new only had this device a few weeks. But what a few weeks soft bricked twice and fixed well atleast I know how to fix but I understand what if I match wrong kernal or something. Thanx dude
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It'll work fine as long as you flash a compatible kernel. I used Omega with KT Kernel on my i337m.

here is everything you need to know to which rom you might want to try...
[GUIDE][ROMS]RUN OTHER CARRIER ROMs on AT&T/TMO/Canadian S4 devices. Here's how!
http://forum.xda-developers.com/showthread.php?t=2295557
Have fun!
Thanks

Switched to tmobile

So i switched over to Tmobile this month and i'm struggling getting the 4GLTE data speeds. I did the APN settings trick and i really cant do much more that i know of. IM on the stock 4.3 ATT firmware and rooted using the Kingo method. I tried to install Safestrat 3.65 but i can get it working.. I could just install a Tmobile ROM if i could use a custom recovery but i havent found a way to do it without a softbrick. I've got less than 5Mbps down so thats crap..

Tmo, is not known for really good LTE speeds or coverage.
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app

Incorrect T-Mobile when using a tmobile branded device has very strong lte speeds.
Yes the coverage can be spotty at times ... rarely!
The problem when using AT&T phone with T Mobile SIM cards is that the lte bands are always compatible.
The AT&T s4 does Carry four LTE bands I use it and get great LTE signal with tmobile service. ...only with the AT&T s4 for instance if you use an AT&T note 2 or s3 with T Mobile service it is really bad.
The reason behind The weak or dropped lte isnt really so much for about the bands it is actually how the device is tuned to work with that carriers service.
To get safestrap recovery working download the AT&T s4 safestrap recovery and install it. Just like in apk file just click install .
Everytime you power off or reboot the phone it will first come to safestrap screen then you choose to boot into recovery or continue to boot into the normal operating system by choosing the very bottom left menu button for recovery or the far right button to boot into the phone normal system .
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OP can't use SS on 4.3
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Yeah I already tried to use Safestrap knowing it may not be compatible. I even used wanam to set my phone into SeLinux permissive mode. The only thing i can think to try is to download the tmobile 4.3 firmware from sammobile but they keep saying their in a transition to a different download server and the firmware hasn't been moved yet.. anyone have the 4.3 tmobile firmware tar and modem for ODin? It should work because they are both same phone just modified through firmware. That would also give me wifi calling and some other good stuff
graydiggy said:
OP can't use SS on 4.3
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Do not use T-Mobile stock firmware. The modem and kernel will not work and you will not be able to flash the correct stuff. The firmwares are not the same.
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app
---------- Post added at 08:58 AM ---------- Previous post was at 08:56 AM ----------
Plus, the bootloaders are different so it won't flash anyways
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app

Yeah i tried anyway but my phone worked fine after, no data loss or anything. It didnt go to the tmobile firmware though unfortunately. I need to get to a tmobile ROM though and this restriction is killing me. HAs anyone found a working recovery for 4.3? Or is safe strap developing for it?
graydiggy said:
Do not use T-Mobile stock firmware. The modem and kernel will not work and you will not be able to flash the correct stuff. The firmwares are not the same.
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app
---------- Post added at 08:58 AM ---------- Previous post was at 08:56 AM ----------
Plus, the bootloaders are different so it won't flash anyways
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app
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Wow is all I have to say
ROOTED ATT MK2 using Tapatalk

i'm not a noob and i knew the risks but i want the full tmobile experience hahaha I found better APN settings though that give me full LTE speeds for future reference:
http://www.4gtricks.com/2013/04/t-mobile-4g-apn-t-mobile-4g-apn-settings.html
jball said:
Wow is all I have to say
ROOTED ATT MK2 using Tapatalk
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Why not trade for a tmobile phone? Then you'd have roms and an unlocked Bootloader.
Sent from my SGH-I337 using Tapatalk

[Q] URGENT: Sprint to T-mobile or Metro PCS ?

Anyway i can Domestic Sim unlock or flash my SPH-L720 to T-Mobile or Metro PCS ?
I'm using 4.3 MK2 and can't seem to downgrade in order to sim unlock through the normal method

I would say to call sprint to get it unlocked but seems like you haven't paid your bill or have a bad ESN
Sent from my SPH-L720 using Tapatalk

Brainfeederz said:
Anyway i can Domestic Sim unlock or flash my SPH-L720 to T-Mobile or Metro PCS ?
I'm using 4.3 MK2 and can't seem to downgrade in order to sim unlock through the normal method
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I haven't found a downgrade method anywhere and the only way to achieve domestic unlock is through mdc modem.
daniel4653 said:
I would say to call sprint to get it unlocked but seems like you haven't paid your bill or have a bad ESN
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That would be for an international unlock.
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I got mine unlocked NP and my friends actually ... He's got att I got T-Mobile rocking h+ on both
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cautious911 said:
I got mine unlocked NP and my friends actually ... He's got att I got T-Mobile rocking h+ on both
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How did you unlock it ?

Brainfeederz said:
Anyway i can Domestic Sim unlock or flash my SPH-L720 to T-Mobile or Metro PCS ?
I'm using 4.3 MK2 and can't seem to downgrade in order to sim unlock through the normal method
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I think you just have to install the MDC modem not the entire firmware. Go to the all sprint firmware post and install the mdc modem. Follow the unlocking steps and then you can go back to the MK2 modem after unlock.

cruise350 said:
I think you just have to install the MDC modem not the entire firmware. Go to the all sprint firmware post and install the mdc modem. Follow the unlocking steps and then you can go back to the MK2 modem after unlock.
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Thanks a lot where are the steps to unlocking it ?

Brainfeederz said:
How did you unlock it ?
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i get FAIL everytime when using odin to flash to mdc modem
this is very frustrating need help

Brainfeederz said:
i get FAIL everytime when using odin to flash to mdc modem
this is very frustrating need help
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What modem and Baseband are you currently on? If you open device manager do you see two ports for your phone?
Sent from my SPH-L720 using XDA Premium 4 mobile app

imbmiller said:
What modem and Baseband are you currently on? If you open device manager do you see two ports for your phone?
Sent from my SPH-L720 using XDA Premium 4 mobile app
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Modem : MK2
Baseband version : L720VPUEMK2

Brainfeederz said:
Modem : MK2
Baseband version : L720VPUEMK2
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Modem and baseband are the same thing.
Sent from my SPH-L720 using Tapatalk

daniel4653 said:
Modem and baseband are the same thing.
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I meant bootloader, I was typing and driving. Also thanks for not helping out this dude at all and instead pointing out a logic fault. Super helpful.
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daniel4653 said:
Modem and baseband are the same thing.
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Well i know that i'm suppose to use a mdc modem but on odin when i try to install it . it fails all the time
Any way around this or a solution to go from mk2 to a mdc modem so i can domestic unlock my phone ?

Brainfeederz said:
Modem : MK2
Baseband version : L720VPUEMK2
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As of now you can't downgrade the modem on mk2 or mja if you took an OTA update to get there. If you flashed your way there and kept mf9 you can downgrade easily.
Sent from my SPH-L720 using XDA Premium 4 mobile app

imbmiller said:
As of now you can't downgrade the modem on mk2 or mja if you took an OTA update to get there. If you flashed your way there and kept mf9 you can downgrade easily.
Sent from my SPH-L720 using XDA Premium 4 mobile app
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Okay thanks i'll just have to be patient then and wait it out
Been reading your unlock guide for the past 2-3 days

imbmiller said:
I meant bootloader, I was typing and driving. Also thanks for not helping out this dude at all and instead pointing out a logic fault. Super helpful.
Sent from my SPH-L720 using XDA Premium 4 mobile app
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I didn't quote you at all dude so relax.
Sent from my SPH-L720 using Tapatalk
---------- Post added at 04:16 PM ---------- Previous post was at 04:14 PM ----------
Brainfeederz said:
Okay thanks i'll just have to be patient then and wait it out
Been reading your unlock guide for the past 2-3 days
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Yeah might be some time from now. Its been like 2 months since MJA release and no one has found a way to downgrade.
Sent from my SPH-L720 using Tapatalk

imbmiller said:
As of now you can't downgrade the modem on mk2 or mja if you took an OTA update to get there. If you flashed your way there and kept mf9 you can downgrade easily.
Sent from my SPH-L720 using XDA Premium 4 mobile app
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Okay thanks I'll just wait until the mk2 downgrade is available
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Can I use a att rom on tmobile Gs4

Sent from my SGH-M919 using xda app-developers app

I wouldn't. I accidentally flashed a NOTE 2 rom on my ATT GS4 and it HARD bricked it. Had to send it in for JTAG repair.

I run tmo roms on my s4. "would think" other way would work. you will need to flash your carrier kernel correctly
nandroid first

rugmankc said:
I run tmo roms on my s4. "would think" other way would work. you will need to flash your carrier kernel correctly
nandroid first
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Thanks bud.
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xda23 said:
Thanks bud.
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As long as you flash a TMO kernel after, you shouldn't have an issue. ATT will typically have more bloat.
You can do some more reading in the dev threads. Try the ViSiON-X thread. Have had good luck with that ROM.