[Q]Low or no signal? - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

I've been experiencing low or no signal on my GS4. Especially if I flash to an AOSP rom. I have no idea y. I had originally gotten the S4 Active, but for the brief time I had that phone my signal was not a problem. I already called AT&T to get a replacement. So I'm gonna see how that goes but just wanted to know if anyone else is experiencing anything like this?
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Have you tried a different radio?
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Signal help

So I bought this phone about a week ago, and have noticed something rather odd...the signal is never locked, it is either emergency calls only or mobile network not available or it does work...but when it does work it lasts for like 3 minutes... I live in Honduras and don't know what the issue might be.. I used to have a captivate and had the best signal one can ask for...any help?
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Try flashing a different modem. Check siky_dudes thread in dev section.
silkys thread is only for cm7/cm9/miui modems!
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Im running ics aokp milestone 4...the problem persists...is there any modem thread you guys can refer me to?
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It'll not help to flash another rom or modem! I had the same problem, tried almost every modem/rom but couldn't solve it. I think one out of 100000 i9000's has signal problems.
I don't recommend to do this;
I used to solve it by plugging in an isolated copper wire into the coaxial input on the back of the device. Here's a link to the thread I started with two videos.
http://forum.xda-developers.com/showthread.php?t=1428316
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pandakh said:
Im running ics aokp milestone 4...the problem persists...is there any modem thread you guys can refer me to?
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Siky_dude in dev section.
This is problem sim-card~~
Well, i flashed a kf1 Modem and my signal seems to have improved....perhaps i shall play a bit more with modems
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Did you check your phone's imei number?
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pandakh said:
Well, i flashed a kf1 Modem and my signal seems to have improved....perhaps i shall play a bit more with modems
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Dude, give that thing back if you can!! Nothing will help! You can do whatever you want, but you'll never achive more than 7-15% more signal and that's nothing relevant!!
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i have same problem after new ICS updates it take like 1-3 minute to get network signal i tried different modems and still nothing
It has improved inside the city, i go to school outside of town and there I have no signal...at least I can call and text from home...
Sent from my GT-I9000 using xda premium
First of all you should determine what might have caused the error.
Signal problems can be caused by hardware, software or network provider:
- If the problem occurred after a software update (which is usually change the modem driver) You should flash back the old modem
- If you didn't update or change firmware or the modem it can be a hardware issue (dropped phone, water damage etc.) If you don't experience hw you wouldn't disassemble.Give it to someone who has experience in this topic.
- Sometimes signal problem can be cause by the network provider (network error or upgrade) It is usually temporary problem you have to wait and get good signal few hours/days later.
I hope I helped in the first step to get to the final solution.

Circle of death?

Anyone experience this yet? I've gotten it twice now. I'm completely stock rooted with twrp recovery so I don't understand why it's happened. I thought the dreaded circle was kernel related. Ps. I'm also running xposed framework.
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xxxicu812 said:
Anyone experience this yet? I've gotten it twice now. I'm completely stock rooted with twrp recovery so I don't understand why it's happened. I thought the dreaded circle was kernel related. Ps. I'm also running xposed framework.
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what is the circle of death? i never heard of it..
evo401 said:
what is the circle of death? i never heard of it..
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It looks like this minus the bars. What it boils down to is no data no network. absolutely no connection of any kind. It was a big issue on my e4gt for awhile before it was discovered as a kernel related issue then eventually solved.
Or so I thought.
Sent from my SPH-L720 using xda premium
I would say you are in a bad area for signal. Or Network Vision is being worked on in your area, which is a good thing. I've never seen that happen on my phone unless I update the prl and profile. Never saw it on my S3 either.
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Will Sprint limit me?

Had anyone suffered consequences for using data to much? Ever since I got my s4 I've been using 4g all the time listening to music from Google music Netflix etc. Last month I did about 10gb it's only been like 5 days on this month cycle and I'm already at 5.5gb so was wondering if I can see consequences or will I be good? Reason I have so much use is that I don't ever turn on my Wi-Fi since I have 4g I just leave it as is...in case you're wondering.
Sent from my SPH-L720 using xda app-developers app
Nope you are fine.
Unless you're roaming a lot, they will not say a thing. I was using far more than that this summer via the hotspot mod wireless tether, and they never bothered me about it.
nope thats the benefit of having sprint
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Ok thanks guys
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Like the above posters said you should be ok. I do know someone that was booted from sprint entirely for too much data used while roaming, lol. They get a little upset about that for sure.

Phone call problems.

Hey all I was just wondering if anyone is having problems with receiving calls. It seems to happen more and more lately. What happens is the phone rings and I answer it but I can't hear them and they can't hear me. The phone then disconnects. It doesn't matter where I am so I don't think it's a phone network problem. I travel all over the place as I'm a truck driver. It seems to happen more when connected to a Bluetooth device but now it's starting to happen when not.
I'm am rooted and at present running on stock. It doesn't matter if I'm on stock or a custom ROM it does the same thing. I'm really regretting getting this phone and ready to go back to my DROID RAZR MAXX HD. I like the phone its blazing fast but it has issues which I've asked about before. I bought this phone on the Edge plan and did line swapping to keep unlimited data. But I'm ready to throw it in the garbage or sell it real cheap. Or starting all over and leaving it unrooted and see what happens. Really wanted root so I could tether when ever I want. Any suggestions?
Sent from my SM-N900V using xda app-developers app
Rooted and stock here with zero issues. Maybe hardware issues?
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Reilly1812 said:
Rooted and stock here with zero issues. Maybe hardware issues?
Sent from my SM-N900V using XDA Premium 4 mobile app
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Looks like I'm going back to my Motorola and throwing this in the trash with the tech support and replacement device issues. This will be the last Samsung device I buy.
RAZR is a great phone. Sorry you had issues with the Note. Did you see this thread? http://forum.xda-developers.com/showthread.php?t=2680962
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Reilly1812 said:
Rooted and stock here with zero issues. Maybe hardware issues?
Sent from my SM-N900V using XDA Premium 4 mobile app
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Reilly1812 said:
RAZR is a great phone. Sorry you had issues with the Note. Did you see this thread? http://forum.xda-developers.com/showthread.php?t=2680962
Sent from my SM-N900V using XDA Premium 4 mobile app
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Yes exactly one of the horror stories I'm talking about
Well I Odin back to stock and still having the same problems. I'm headed to Verizon today to see what they say. Hopefully I get lucky and don't get a bum replacement device.
Sent from my SM-N900V using xda app-developers app
I sold my note 3 back in January because of connectivity and phone quality issues ... been really missing the spen, multiwindow and sceen size as of late. Was thinking about coming back to the N3 but then I see stuff like this and remember why I left [emoji20]
May grab a note 2 instead ...
Sent from my GT-N5110 using Tapatalk

[Q] 4g broken?

Hey guys, so I've been messing around with a lot of custom ROMs lately, but this here has stumped me. I've been running the CM11 nightlies, but yesterday I heard about the Sammy Deluxe ROM, one that was designed to look like the S5. It was for a different carrier. After seeing this post http://forum.xda-developers.com/showthread.php?t=2698799 , I thought I'd give changing the APN's a shot, but it turns out the Dev hasn't implemented a menu for this yet. I decide to go bank with a nandroid restore, and my 4g won't seem to turn on. Manually selecting any APN causes no signal then it switches back. Any ideas guys?
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If on touchwiz ROM for Sprint. Update prl and profile then reboot if that doesn't work. While connected to wifi, in the dialer put ##72786#. This will reactivate the phone.
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Not on TouchWiz. CM11 Nightlies.
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I suggest you go to touchwiz.
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