3g no longer working on my phone after flashing roms - Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot

I'm in an area where I don't have 4g, and since flashing my ROMs, I often just don't have 3g. Like I can make calls and send texts but I have no 3g whatsoever.
Every once in a while, through a restart I can get it, but about 90% of the time I don't have it.
Im running CyanogenMod 10.2, and I've attempted flashing to sacs custom ROM with no luck. Its driving me crazy, any help?

ahendowski said:
I'm in an area where I don't have 4g, and since flashing my ROMs, I often just don't have 3g. Like I can make calls and send texts but I have no 3g whatsoever.
Every once in a while, through a restart I can get it, but about 90% of the time I don't have it.
Im running CyanogenMod 10.2, and I've attempted flashing to sacs custom ROM with no luck. Its driving me crazy, any help?
Click to expand...
Click to collapse
Don't know what modem/baseband you're on.
Try MF9 modem.
Then update PRL and Profile

leaderbuilder said:
Don't know what modem/baseband you're on.
Try MF9 modem.
Then update PRL and Profile
Click to expand...
Click to collapse
It looks like my baseband version is L720VPUAMF9, which I'm assuming is the MF9 modem you were talking about.
I'm looking at the prl and profile, and I'm not 100% sure how to update it on the s4.

ahendowski said:
It looks like my baseband version is L720VPUAMF9, which I'm assuming is the MF9 modem you were talking about.
I'm looking at the prl and profile, and I'm not 100% sure how to update it on the s4.
Click to expand...
Click to collapse
You've got the MF9 modem that's good.
Check this out. Update both PRL and Profile.

So I flashed my only touchwiz rom (Sacs Custom Rom) and I updated the profile + PRL, as well as went into the dialer and pressed ##72786# which basically, I think did the same thing.
I backed up an AOSP Illusion Mod which I customized. If I flash the back up, will my PRL / profile remain the same? Or is that something in with the network settings?
Also interestingly enough, I have 3g once I booted the Sacs Custom Rom. Last time that happened, I flashed the Illusion Mod and had 3g for a while.... then it never came back.
Any thoughts? I really want to figure this out, it's horrible not having data connection and paying for it. I really love my Illusion mod, it's fast and sleek.

Related

cm10 internet problems.

I recently installed cm10 on my new s4 but the 3g speeds are really slow. WiFi is slow too. I saw a forum with the same problem with the HTC one. They said it was a problem with the baseband. Any help would be great because I'm not a huge fan of the stock os even though the internet runs great on it.
anyone know of any basebands that work. I would appreciate any help
weinerwad3000 said:
anyone know of any basebands that work. I would appreciate any help
Click to expand...
Click to collapse
You could always try to go to a Touchwiz Rom, update the prl and profile, and then flash back to cm10. I've heard that can speed up data a bit
You also could try flashing the MDL modem with Cm10...that might help as well http://forum.xda-developers.com/showthread.php?t=2338919
MHousos said:
You could always try to go to a Touchwiz Rom, update the prl and profile, and then flash back to cm10. I've heard that can speed up data a bit
You also could try flashing the MDL modem with Cm10...that might help as well http://forum.xda-developers.com/showthread.php?t=2338919
Click to expand...
Click to collapse
I don't think updating in the stock rom will have any affect since the internet on the stock rom runs fine. It's only after I install cm10 that the internet starts to bog down.
MHousos said:
You could always try to go to a Touchwiz Rom, update the prl and profile, and then flash back to cm10. I've heard that can speed up data a bit
You also could try flashing the MDL modem with Cm10...that might help as well http://forum.xda-developers.com/showthread.php?t=2338919
Click to expand...
Click to collapse
I did the odin thing and now my stock rom can't use wifi. When I enable it it says an app is trying to get certain permissions and wifi immediately gets disabled. It tells me to reboot the phone and I do so and same problem occurs. I did come to find that when on cm10 the internet does work but the play store and pandora only work on wifi. I get connection errors on 3g with those two apps.
Try to flash a custom kernel or flash a different AOSP ROM.
Sent from my SCH-I545 using xda premium
nicotheandroidguy said:
Try to flash a custom kernel or flash a different AOSP ROM.
Sent from my SCH-I545 using xda premium
Click to expand...
Click to collapse
Not sure why the kernel would affect it. I was trying to find an aokp version that would work for sprint but couldn't find one.
It could help the WiFi issues because when my WiFi wouldn't work I flashed a custom kernel and it would work.
Sent from my SCH-I545 using xda premium
---------- Post added at 07:44 PM ---------- Previous post was at 07:40 PM ----------
weinerwad3000 said:
Not sure why the kernel would affect it. I was trying to find an aokp version that would work for sprint but couldn't find one.
Click to expand...
Click to collapse
You might like this rom it is a mix of cm and aokp it's called Packman ROM it looks really good.
http://forum.xda-developers.com/showthread.php?t=2312063
Sent from my SCH-I545 using xda premium
nicotheandroidguy said:
It could help the WiFi issues because when my WiFi wouldn't work I flashed a custom kernel and it would work.
Sent from my SCH-I545 using xda premium
Click to expand...
Click to collapse
Oh you mean for the stock rom? I don't want to use the stock ROM if I can get the play store and Pandora working on cm10. The stock ROM is saying its a security issue and not just an error with the WiFi so I don't think that would help. The problem started after I installed the modem in Odin.
For both I also recommend checking out that ROM it seems like what you want in a ROM customization, AOSP, and the stabability of CM. Here is the link http://forum.xda-developers.com/showthread.php?t=2312063 if not check the original android development section it is filled with great AOSP roms similar to CM or better.
Sent from my SCH-I545 using xda premium
There is many cases that aosp roms/kernals have slow data speeds. The epic 4g touch was one. All aosp or touchwiz roms with non stock kernal had poor data speeds. This phone may be different. Im running tw rom with kt kernal and data speeds are the same. The prl/profile thing is huge not being able to update it in aosp can cause problems.
I installed pacman ROM and the gapps and Google play immediately stops working and a message pops up every 5 seconds and the internet won't load. I got Google to load once and that was it. I had to switch back to cm10.
weinerwad3000 said:
I installed pacman ROM and the gapps and Google play immediately stops working and a message pops up every 5 seconds and the internet won't load. I got Google to load once and that was it. I had to switch back to cm10.
Click to expand...
Click to collapse
I get this message on every ROM I install now unless I restore my cm10 ROM. When I restore my stock ROM WiFi don't work.
weinerwad3000 said:
I get this message on every ROM I install now unless I restore my cm10 ROM. When I restore my stock ROM WiFi don't work.
Click to expand...
Click to collapse
OK fixed the play store problem. The other day I enabled lte in data profile but my area doesn't have lte. I still have to fix the WiFi problem.
MHousos said:
You could always try to go to a Touchwiz Rom, update the prl and profile, and then flash back to cm10. I've heard that can speed up data a bit
You also could try flashing the MDL modem with Cm10...that might help as well http://forum.xda-developers.com/showthread.php?t=2338919
Click to expand...
Click to collapse
so I reinstalled the moden to get my wifi working but I used odin ti flash a stock rom but it was for tmobile and now I dont have roaming.
weinerwad3000 said:
so I reinstalled the moden to get my wifi working but I used odin ti flash a stock rom but it was for tmobile and now I dont have roaming.
Click to expand...
Click to collapse
I'm glad flashing the modem helped....what rom did you want to flash?
MHousos said:
I'm glad flashing the modem helped....what rom did you want to flash?
Click to expand...
Click to collapse
I want a working stock rom for backup but rom manager doesnt work because my stock rom is tmobile and I have sprint. ill just look for cwm recovery for sprint and ditch this ****.
weinerwad3000 said:
I want a working stock rom for backup but rom manager doesnt work because my stock rom is tmobile and I have sprint. ill just look for cwm recovery for sprint and ditch this ****.
Click to expand...
Click to collapse
Here's the latest stock rom for our Sprint GS4 http://forum.xda-developers.com/showthread.php?p=41192248
Hope it helps
MHousos said:
Here's the latest stock rom for our Sprint GS4 http://forum.xda-developers.com/showthread.php?p=41192248
Hope it helps
Click to expand...
Click to collapse
Awesome thanks.
Not sure what happened but the error is back

[Q] Telus SG-I337M / I337MVLUAMG1 Baseband With Kangabean GE Romm Issues

This is my 1st post ever because every question I've ever needed answered I've been able to find.Unfortunately I cannot find the answer to this problem. Since my Post count is below 10 I cant post the question in Kangabeans thread.
This is the ROM I am using
I rooted and flashed my phone 4 days ago and ever since then my wifi or mobile connection never go above 2 bars. Everything works except data cuts in and out fairly often which never happened before while i was using stock. I can sometimes get LTE but it mostly just says H and is really slow. I live right in the middle of downtown Edmonton and always had an LTE connection before so I'm pretty sure it is an issue with my phone and the ROM. I can also be standing right next to my wireless router and i only have 2 bars showing up for wifi.
I know some people had mentioned similar problems in the Kangabean thread with poor LTE connections but almost all say it is working good which leads me to believe its something I've done. My initial thought to fix the issue was to flash a new modem, specifically this one modem_CWM_I337MVLUAMDJ.zip{4/22/2013}(Canada) from this thread because everyone that was saying their LTE and WIFI were working appeared to be on an MDJ baseband. I tried flashing the modem and nonhlos through Odin but it failed with odin saying: Failed, Receive response from LOKE. I figured my best course of action was to try and reflash the MG1 Baseband but again i recived the Failed, Receive response from LOKE. Thinking i screwed something up i decided to try and boot up my phone and sure enough i was stuck in a bootloop. Luckily all I had to do was load up recover and wipe the cache partion.
Everything is back as it was before i tried flashing the modems, even the poor connection to WIFI and Data.
Does anyone have any idea as to how I can fix this or what I did wrong that caused Odin to fail flashing??
Pretty sure I just found my answer for why I cant flash the modem. Im pretty sure MG1 is newer than MF3 (correct??) and if your on MF3 Odin wont work
I was doing some thinking..... I have mobile odin pro Can I try flashing the MDJ or MF3 Modem and nonhlos files with it or will it too end up failing??
Suyneej said:
I was doing some thinking..... I have mobile odin pro Can I try flashing the MDJ or MF3 Modem and nonhlos files with it or will it too end up failing??
Click to expand...
Click to collapse
Wow hold on! Do you have telus sgh-i337m s4? If so then you don't need anything to do with mf3. Only att and sprint have lockedbootloader. If your baseband is MDB or MDJ then you don't need Loki and mf3 kernel, in fact you'll brick your phone if flash mf3 kernel on any s4 brought in Canada.
You shouldn't be going anywhere near MF3 on your i337m. MG1 or MDJ only for us Canadians
Thanks guys I wasnt sure If I could flash those without any problems so I was waiting for someone to reply to this thread before i tried going that route to fix my connectivity issue again.
Sorry guys,
I am a Canadian with a 1337m MDJ S4 running CM 10.2
I just wanted to double check that I am bound to ROMS made for MDJ. Cannot I not update to MDL?
There are a number of TW Roms that I would like to try to get my camera and multiwindow options back Like :
FoxHound GearEngine 1.3 AROMA OR Eclipse.
Your feedback would be amazing.
Thank you
Thank God im not the only one. Look at my thread http://forum.xda-developers.com/showthread.php?t=2455955
maybe we can find a solution together. Im using CM 10.2 but i live in Mexico son i had to flash my carrier's modem and it seems its coming back to normal but im not totally shure... still testing this modem (all info is on my thread)
Let me know if you find a fix... thanks
Sent from my SGH-I337M using xda app-developers app

[q] flashed to stock - no data connection

i was on GOLDENEYE ROM for a couple of days in vegas came back and wanted to flash back to stock because of some small issues.
did a flash back to MDL and it flashed fine data worked and everything yesterday i found it weird that none of my user files were deleted as if it flashed over the custom rom. had to re root did that easily.
last night i got home and decided i wanted to flash all the way back to stock, did that and next thing i know, no connection to apn at all.
no web cant text, nothing.
im on MDL now i have tried flashing to MDB and MDL (AT&T btw) no data on any of these roms. any help please ?
i have no idea what to do
i thought about removing the triangle and going to at&t and requesting a new phone would that work if nothing else?
help pleaaaaaase
thank you !
Did you check your apn? Sounds like that's your problem.
jd1639 said:
Did you check your apn? Sounds like that's your problem.
Click to expand...
Click to collapse
yes i did! i tried adding new ones too.
could you provide the stock att lte apn settings for me? ive already tried a few but im willing to try any you provide to me as well. please !
EDIT: SORRY MEANT TO MENTION I WAS ON GOLDENEYE ROM BEFORE FLASHING BACK TO STOCK MDL

[Q] MF9 update issues

Hello everyone.
I recently got a GS4, and it has the MF9 update. I've been suffering from poor data connection, dropped signal, etc. After doing some searching, I've found that it is a well known problem.
My questions for you guys:
1) If I root and install a custom rom based on MF9, will I have the same issues?
2) Would I be better off just rooting and installing the latest OTA before MF9?
Thank you!
Custom rom might help. I'm stock rooted mf9 and have no problem whatsoever.
bjb_nyj101 said:
Hello everyone.
I recently got a GS4, and it has the MF9 update. I've been suffering from poor data connection, dropped signal, etc. After doing some searching, I've found that it is a well known problem.
My questions for you guys:
1) If I root and install a custom rom based on MF9, will I have the same issues?
2) Would I be better off just rooting and installing the latest OTA before MF9?
Thank you!
Click to expand...
Click to collapse
I'm sacs custom Rom and have no connectivity issues I highly recommend it.
Sent from my SPH-L720 using XDA Premium 4 mobile app
bjb_nyj101 said:
Hello everyone.
I recently got a GS4, and it has the MF9 update. I've been suffering from poor data connection, dropped signal, etc. After doing some searching, I've found that it is a well known problem.
My questions for you guys:
1) If I root and install a custom rom based on MF9, will I have the same issues?
2) Would I be better off just rooting and installing the latest OTA before MF9?
Thank you!
Click to expand...
Click to collapse
Your connections issues are with your phone (hardware or software), sprint's network or you location.
Doubtful that a ROM will make 'much' difference if you already have problems.
What might help is starting at complete stock MF9 - rwilco12 has a full 'one-click' with root here There is also a full wipe (clears the data partition too) that might be a better option for starting out.
Then once you get your phone activated update the PRL and then the Profile.
THEN maybe start thinking about ROMs. Spend some time looking reading and then reading some more and you will find what you need.
Im having signal issues but they are workinh on lte upgrades right now in my area I got much better connection today after flash comadose mod, I went from around 500 kbps to 2 mbps quite a change and I love it but im still having trouble with 3g dropping out completely still in areas I get 2mbps and then it comes back after like a couple mins sometimes I see an ehrpd error code when it happens
Sent from my SPH-L720 using Xparent Skyblue Tapatalk 2
leaderbuilder said:
Your connections issues are with your phone (hardware or software), sprint's network or you location.
Doubtful that a ROM will make 'much' difference if you already have problems.
What might help is starting at complete stock MF9 - rwilco12 has a full 'one-click' with root here There is also a full wipe (clears the data partition too) that might be a better option for starting out.
Then once you get your phone activated update the PRL and then the Profile.
THEN maybe start thinking about ROMs. Spend some time looking reading and then reading some more and you will find what you need.
Click to expand...
Click to collapse
Thanks for all the great info. I'm just at a loss as to what the problem could be. I don't think it's the phone itself; the previous owner said he had zero issues with it. I thought it could be Sprint's crappy network, but I activated my iPhone 5 for a few hours and had none of the issues I have on the GS4
bjb_nyj101 said:
Thanks for all the great info. I'm just at a loss as to what the problem could be. I don't think it's the phone itself; the previous owner said he had zero issues with it. I thought it could be Sprint's crappy network, but I activated my iPhone 5 for a few hours and had none of the issues I have on the GS4
Click to expand...
Click to collapse
Well since you say you got it used - from someone else, I'd re-iterate reloading the entire stock MF9 from the .tar (or one-click) to reload/reset all partitions and take it back to stock. Without starting fresh you (and us here) have no real idea what is on it.
Then again with what I recommended previously.
leaderbuilder said:
Well since you say you got it used - from someone else, I'd re-iterate reloading the entire stock MF9 from the .tar (or one-click) to reload/reset all partitions and take it back to stock. Without starting fresh you (and us here) have no real idea what is on it.
Then again with what I recommended previously.
Click to expand...
Click to collapse
Yeah, I did restore it back to stock MF9 and the problem persists
bjb_nyj101 said:
Yeah, I did restore it back to stock MF9 and the problem persists
Click to expand...
Click to collapse
Did you restore via Odin? or just the zip(s)
If problem persists after full Odin to stock, updating PRL and Profile then I'd say it's your device. Look at warranty. You could try some tweaks like ComaDose etc. But if they don't do the trick then I don't know.

Reception gone in the crapper

I have played with several different ROMs recently (I am rooted). I was on Extreme Syndicate (older version) then updated to V4 since I didnt want the theme. I noticed I mostly have 3G and I normally had 4G before. I clean installed it to the V5, same thing. Now I am on the "Modded Stock Verizon 5.0 BOC4 Based Lollipop Rom" (http://forum.xda-developers.com/verizon-galaxy-s5/development/modded-boc4-deodexed-rom-t3099453) and I have the same issue. Can someone help me figure out what I am doing wrong or is it an issue with BOC4?
danman421 said:
I have played with several different ROMs recently (I am rooted). I was on Extreme Syndicate (older version) then updated to V4 since I didnt want the theme. I noticed I mostly have 3G and I normally had 4G before. I clean installed it to the V5, same thing. Now I am on the "Modded Stock Verizon 5.0 BOC4 Based Lollipop Rom" (http://forum.xda-developers.com/verizon-galaxy-s5/development/modded-boc4-deodexed-rom-t3099453) and I have the same issue. Can someone help me figure out what I am doing wrong or is it an issue with BOC4?
Click to expand...
Click to collapse
When I go to mobile networks and hit the "CMDA/LTE/UMTS", it signs onto 4G but I cannot place phone calls. The other two I can place calls but it only signs onto 3G. What gives? do I need to update the kernel or modem?
danman421 said:
When I go to mobile networks and hit the "CMDA/LTE/UMTS", it signs onto 4G but I cannot place phone calls. The other two I can place calls but it only signs onto 3G. What gives? do I need to update the kernel or modem?
Click to expand...
Click to collapse
You can always try different modems. Try an older one.

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