I have learned all I know about flashing ROM's and rooting phones thanks to all of the helpful people here! I'm running the latest stock NAE, which I found as an automatic download via KIES, on my unlocked sph l720, with the StraightTalk network and AT&T SIM. Everything works great except for the data, it will toggle on, but not actually receive data.
Has anyone else came across this issue and been able to resolve it? Or any advice for a new guy? I'd really appreciate it!
-Adrian
Dont use the lte apn for att use the one that has cingular in it and you will be connected to hspa+/4G
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Also try and reflash your moden cuz sometimes kies only flashes the software not the modem
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Hello XDA, just a quick question. I get incredible service everywhere except where I actually live. I've been told to flash a modem that'll work better in my region, however if drive just 5 minutes away I get full bars; so I'm not worried about a regional modem.
Any tips/tricks on signal boosting or finding the best tower to connect to? The apps on the Google store do no justice.
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Br4nd3n said:
Hello XDA, just a quick question. I get incredible service everywhere except where I actually live. I've been told to flash a modem that'll work better in my region, however if drive just 5 minutes away I get full bars; so I'm not worried about a regional modem.
Any tips/tricks on signal boosting or finding the best tower to connect to? The apps on the Google store do no justice.
Sent from my SGH-I337 using xda app-developers app
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This is really a problem with your network, not the phone. You can flash the latest MF3 modem and see if that helps, but as far as regional modems..I have no clue what they are talking about.
http://www.androidfilehost.com/?fid=23134718111253761
This is the latest modem available for the AT&T i337, not the i337m so anybody else reading this please don't flash unless you have the i337 and NOT ON THE MF3 FIRMWARE.
You can flash with your recovery, should only take a couple seconds. Reboot and enjoy!
EDIT: @jball
I forgot to include that about the MF3 firmware. Thank you very much for adding that!
Are you MDL or MF3 base
If MDL rooted and custom recovery than yes flash a different modem.
If MF3 u can't flash a different modem to my knowledge.
Sent from my SAMSUNG-SGH-I337 using xda premium
Just pony up the hundred bucks for a microcell.
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jball said:
Are you MDL or MF3 base
If MDL rooted and custom recovery than yes flash a different modem.
If MF3 u can't flash a different modem to my knowledge.
Sent from my SAMSUNG-SGH-I337 using xda premium
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what if you are running MDB? I just returned my phone to stock and rooted with motochopper and I am having this same issue.
When I received my phone it was stock MDL so not sure about MDB.i do know for sure that if you have root and a custom recovery like CWM,TWRP that is not Safestrap than u can flash any of the modems/radios to see witch one you like.GOOGLE is is a friend I use alot to get what info I need most of the time.
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Steven is correct, get a signal booster for house. If you complain smartly, carrier may provide. I have same issue, great everywhere but my house. It is just a bad spot or as some call them, a deadzone. Not sure exactly why yours is bad. My house is in a small valley surrounded by tall trees.
I can even go to second story and get some LTE. But, downstairs -111db and virtually no signal at all. Fortunately I have Wifi at home.
Good Luck
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.
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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
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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
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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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Click to collapse
Why not trade for a tmobile phone? Then you'd have roms and an unlocked Bootloader.
Sent from my SGH-I337 using Tapatalk
I'm running sacs rom. And last night sometime I lost my mobile signal. I'm unable to make any calls and have no Internet. And yes I paid my bill. If someone could point me in the right direction it would be greatly appreciated
Sent from my SPH-L720 using xda app-developers app
Does it show no signal bars and has a red X in it?
I had this on stockish v4 two days ago while I was messing around with random files. I was able to solve it by dirty flashing the ROM again. Then connecting to WiFi and updating profile.
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No. I don't have anything. I even did a clean install of newest rom. I connect via wifi and I get a preparing network and searching for service.
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Okay so I figured out that my radios suddenly disappeared. I tried flashing the latest radios through Oden with a pass. But they are not sticking. Any ideas?
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loumoli said:
Okay so I figured out that my radios suddenly disappeared. I tried flashing the latest radios through Oden with a pass. But they are not sticking. Any ideas?
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You'd need to flash the exact same modem as you had before, however it makes no sense that the modem would just disappear.... Are you sure nothing happened?
loumoli said:
No. I don't have anything. I even did a clean install of newest rom. I connect via wifi and I get a preparing network and searching for service.
Sent from my SPH-L720 using xda app-developers app
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You can try calling Sprint have them reset service or if you have insurance on it take to sprint store, you may have to take it in as stock unrooted. My S4 was doing same thing, but I didn't have insurance on it, so had to send (unrooted) in for warranty service through Samsung to have it fixed.
sent from nowhere
My Divice: GT-I9505 Samsung S4
ROM: Google Play Edition
Country: Dominican Republic
Carrier: Orange Dominicana
Good Evening, i have this network issues since i update mi s4 to android 4.4 with odin, every time i turn on my mobile network, network go down, i can not make calls, send sms.
Now i install Google Play Edtition im flash MK9 modem to it, but it does not work properly i have to use theI phone into 2G network them in that network is stable but soon as i turn on the normal network i mean 3G network or 4G LTE it goes down...
My question is how can i go back to have my normal network, even if with a custom room???...
I read, i made my google search, i flash alot of stock rom and nothing work...
Anthony Placencio....
Thnkz For The Help...
If these was no the place for ma question, place just tell me im new posting here....
do you make back up efs?
No I didnt...
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I flash MDM modem and know is working grate..
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aplacencio said:
I flash MDM modem and know is working grate..
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What do you mean with MDM modem? I tested 4.3 Modem on 4.4.2 and however it seams to not work. I'm Italian and I'm having network issues too after I received latest 4.4.2 Android on my i9505.
It works for 1 day an them even my imei dissapear lol :/ i just buy a new S4 I9500 that works for orange carrier here in dominican republic im gonna fix the i9505 and sale it
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My fried bought a Galaxy S4 from AT&T when he was in US. While leaving the country he bought an unlock code from AT&T and unlocked the phone using the same in India. His phone was working fine initially. Then sudden signal loss started to occur and need to restart the phone to get the signal back. Tried using different Indian carriers and the same issue continued. Will I be able to solve this issue by flashing a custom rom into his phone? Do I need to take care of anything else, like the modem firmware or something. Attaching a screen shot of his phone details. Please help guys..
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amith007 said:
My fried bought a Galaxy S4 from AT&T when he was in US. While leaving the country he bought an unlock code from AT&T and unlocked the phone using the same in India. His phone was working fine initially. Then sudden signal loss started to occur and need to restart the phone to get the signal back. Tried using different Indian carriers and the same issue continued. Will I be able to solve this issue by flashing a custom rom into his phone? Do I need to take care of anything else, like the modem firmware or something. Attaching a screen shot of his phone details. Please help guys..
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You could try reflashing the same MDL firmware first. If that doesn't work, then install TWRP and try the different flashable modems.
Sent from my SGH-I337 running BlackBox 3.0
Thank you for the reply.. However we have already tried a factory reset.. Will it be a problem if I flash the modem firmware available in the Indian Galaxy S4?? The Indian version comes with an exynos octa processor instead of the Qualcomm one..
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amith007 said:
Thank you for the reply.. However we have already tried a factory reset.. Will it be a problem if I flash the modem firmware available in the Indian Galaxy S4?? The Indian version comes with an exynos octa processor instead of the Qualcomm one..
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Doing a factory reset is different from reflashing the firmware. I don't think the other modems would work, but I'm not entirely sure. If they're recovery zips you could try, but if they're ODIN files it definitely won't work.
Sent from my SGH-I337 running BlackBox 3.0
I have tried reflashing the phone with Odin. The device now has the latest Android 4.4.2 firmware from AT&T. It seemed to work fine after flashing. We got the network and were able to make calls as well. However after sometime the signal got cutoff itself. Tried flashing again, the same thing happens. Any other suggestions??
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