Develop Bugs

[Q] losing internet connection 3g/4g restart fixes it for a minute. HELP

Also is anyone else having trouble keeping an internet connection? and 3g or 4g? IT BLOWS>>.. sometimes i just have bars with no 3g/4g and can't get on internet.. then i poweroff turn back on and it'll have 4g for a min.. switch to 3g and then eventually no internet at all.. and im in Dallas TX so i know ther's plenty of towers...
sprint galaxy s3

Is it your upload, your download, or both?
Sent from my SPH-L710 using xda app-developers app

it's both. i have no internet connection.. i just have bars sometimes full bars with no 3g/4g. and i can get txts and calls while i have the bars..
if i power off and power on.. then it will work again.. and if im in 4g coverage it starts off saying 4g.. that doesnt' last long, then it'll say 3g, then go down to 1x, then go down to just bars.. i'm beginning to wonder if it's my refurbished phone i got from the insurance company..i didn't have my new one for one day and bricked it so i didn't get a chance to see if it was the phone or not..
just recently, i have been sitting in the same spot, trying to find roms and stuf, and i switched from cyanogen to slimbean and it said 3g once.. but i can't imagine it having anything to do with the roms..
thanks for any help you may have.

I would recommend flashing one of the more stable ROMs in the android development section. If that doesn't work flash a sprint PRL.
Sent from my SPH-L710 using xda app-developers app

what do you consider to be stable roms?
i enjoyed cyanogenmod10 and am using the slim bean now. it's ok
not sure how to flash sprint prl...
i searched and didn't find much..
offer any assistance on that?

Im in Dallas as well. Its not your phone. its the network. Right around the middle of December i noticed it starting to get worse.
Its actually back to pre network vision speeds. 4G at my office is less then a meg down. Month or two ago i was getting 4-10 megs down on LTE.
Ive also noticed my 3G speeds are slower then normal as well. Sprint said Dallas has been undergoing some network testing issues and hoped to have it resolved by the 16th of this month. So 5 more days.. But i tend to not believe what they say. TO much bad info from them too often.
FYI, happens on my EVO LTE and GS3..

the T-mobile signal on s4

Seems the signal isn't good on the S4, flashed the base band ,an d the problem still exists...
Bad luck

karl_2000 said:
Seems the signal isn't good on the S4, flashed the base band ,an d the problem still exists...
Bad luck
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Click to collapse
might just be your area, i get full bars and kick a** data speeds all around my city

TheAtheistOtaku said:
might just be your area, i get full bars and kick a** data speeds all around my city
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Click to collapse
+1 to this

karl_2000 said:
Seems the signal isn't good on the S4, flashed the base band ,an d the problem still exists...
Bad luck
Click to expand...
Click to collapse
I have the same issue. I'm in the SF Bay Area and even though TMobile's site has where I live and work as dark green (excellent 4g) I am lucky to get even one bar. Half the time I get network errors. Anyone else with TMobile experience anything like this? Any chance it's something that'll get resolved before my 30 day return period ends?

do any of you have other tmobile phones to compare signals with? if so, do that and if there are major differences talk to a tmobile store about getting a replacement.
these might be isolated incidents, because the majority of people are getting fully functional units

Wavern said:
I have the same issue. I'm in the SF Bay Area and even though TMobile's site has where I live and work as dark green (excellent 4g) I am lucky to get even one bar. Half the time I get network errors. Anyone else with TMobile experience anything like this? Any chance it's something that'll get resolved before my 30 day return period ends?
Click to expand...
Click to collapse
im in SF bay area (mountain view)
my data speeds are *top notch*.
you are either in an area thats out of tmobiles footprint or have a defective unit.
best bet would be to wait till tmobile actually gets the GS4 on display in the store.
when they do, go to your nearest tmob, and do a speedtest.net comparison with the demo model, and yours. if they are similar, then your part of the bay is legacy; if there is a big difference; 3,4 5 etc megabit difference; your unit may be worth exchanging for a new unit.

Wavern said:
I have the same issue. I'm in the SF Bay Area and even though TMobile's site has where I live and work as dark green (excellent 4g) I am lucky to get even one bar. Half the time I get network errors. Anyone else with TMobile experience anything like this? Any chance it's something that'll get resolved before my 30 day return period ends?
Click to expand...
Click to collapse
What part of SF are you experiencing this? My GF lives by the ballpark & she won't switch with me if she gets ****ty service.

I have excellent reception (bars) on my S4.
Way better than my Note II.

I let you know. When I get my phone next week. I do a speedtest and a screenshot of the phone signal in the settings menu.
DEVICES:
NEXUS 7 32GB STOCK
(NO ROOT)
T-MOBIL LG G2X (LG-P999)
STOCK (ROOTED)
Sent from my LG-P999 using xda premium

Have S4 and One, both show identical signal and speeds are also same.
Sent from my SGH-M919 using Tapatalk 2

Im getting much improved signal compared to my Gnex and Atrix HD.
Sent from my SGH-M919 using Tapatalk 2

Still no signal inside my workplace. Will do more tests. It does seem the signal is more stable, but it's only been a couple days.
Also, 4G LTE flashed for a couple seconds at my house. I live in the D.C metro area. Nice.

I have the HTC One in the Phoenix market. LTE is difficult to find more than a few bars on. 4G HSPA+ has been very easy to get full bars on.
I'm somewhat convinced T-Mobile is still working on building out in even LTE and re-farmed markets.
Sent from my cm_tenderloin using Tapatalk HD

Its funny how T-Mobile improves their network and yet many years later I still don't have service in places where I had no service maybe 5-6 years ago. And on top of this I noticed even more dead spots. I think T-Mobile should be working on that along with building penatration.....I would much rather have 3G everywhere then LTE almost nowhere.
Lately it became very frustrating since my wife has no service at work, i have no service at work, and i recently moved to different location and still no service....and God forbid I loose my wife in the mall, I have zero chances of finding her because no T-Mobile service inside.

Just got my S4 today and did not realize theres LTE where I work (fremont) which I never saw on my note 2. Even went out to lunch and was still getting LTE the next street over. So just to test I'm now back on my note 2 and it is not picking up LTE at my work. That tells me the radio on the s4 is much better.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

Oops
Sent from my SGH-M919 using XDA

Wavern said:
I have the same issue. I'm in the SF Bay Area and even though TMobile's site has where I live and work as dark green (excellent 4g) I am lucky to get even one bar. Half the time I get network errors. Anyone else with TMobile experience anything like this? Any chance it's something that'll get resolved before my 30 day return period ends?
Click to expand...
Click to collapse
yea its something with the S4's phone/modem. I get bars and shows signal strength of 3 to 4 bars and i can make call but no internet in certain areas all around Los Angeles County/Orange County/Las Vegas/NYC. To test it i had my buddy go with me with his LG L9 and my buddy with his LG L9 phone would work fine on the calls and data/internet meanwhile my S4 would only get calls but no data as if it was a deadspot. i would have to go around like 1/4 or so before it would work again. its really strange not to mention annoying. I noticed this started happening to me after i upgraded from MDB to the MDL baseband and after i unlocked the phone using the "debug service menu". i wish i knew someone else with a stock TMO S4 to test my findings out more. I also cant wait for more tmo S4 modems. ive been thinking of ODINing back to stock MDB to test my theory, but i have just been lazy.
---------- Post added at 08:20 PM ---------- Previous post was at 07:24 PM ----------
XeoNoX said:
yea its something with the S4's phone/modem. I get bars and shows signal strength of 3 to 4 bars and i can make call but no internet in certain areas all around Los Angeles County/Orange County/Las Vegas/NYC. To test it i had my buddy go with me with his LG L9 and my buddy with his LG L9 phone would work fine on the calls and data/internet meanwhile my S4 would only get calls but no data as if it was a deadspot. i would have to go around like 1/4 or so before it would work again. its really strange not to mention annoying. I noticed this started happening to me after i upgraded from MDB to the MDL baseband and after i unlocked the phone using the "debug service menu". i wish i knew someone else with a stock TMO S4 to test my findings out more. I also cant wait for more tmo S4 modems. ive been thinking of ODINing back to stock MDB to test my theory, but i have just been lazy.
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Click to collapse
i think it was a TMO LTE tower upgrade issues. after doing the Settings > More networks > Mobile networks > Network mode > and switching between the WCDMA and GSM one or the other now will work. better to have some internet than no internet, weird how the S4 just wont switch over to the working GSM internet if WCDMA fails....i guess when they coded it they figured if u have bars it "should work in theory" but they were wrong ...personally i think this should be considered a "bug"

I thought I was the only one. I found that if i keep my diztronic tpu case on while in my pocket it destroys all signal for some reason. I take it off and its fine.

layzer253 said:
I thought I was the only one. I found that if i keep my diztronic tpu case on while in my pocket it destroys all signal for some reason. I take it off and its fine.
Click to expand...
Click to collapse
I further tested my theory and went without my case all day. It didnt appear to do anything different at all. I am on CM10.1, I think I might go back to stock for awhile to see if it changes the fluctuating signal issue.

Just curious on how everyones signal is and which baseband they are on?
I'm on M919UVUAMDL and I have seen up to 15% of no signal while my S3 had 0 signal loss in a regular day.

NYC and Data Coverage

So I live in the city. Right now I'm using MOAR v4.01 and I cannot achieve a connection other than 1x no matter where I am in the city. I had this problem on other ROMS so I don't think it's MOAR.
I was using the Anthrax Aosp rom a few months ago and noticed I achieved a 4g connection on the upper east side but ever since then I cannot get higher than 1x.
Is there anyone else in NY getting a 3g or 4g connection? Does anyone know what I can do to try to fix this? I am using the MD4 modem (had the problem on MB1 too) and update my profile and prl often. I am really getting frustrated paying for services I can't even use. I am hoping that I won't have to unroot and reset my flash counter to bring the phone to a sprint store.
Sent from my SPH-L710 using Tapatalk 2

davelikestacos said:
So I live in the city. Right now I'm using MOAR v4.01 and I cannot achieve a connection other than 1x no matter where I am in the city. I had this problem on other ROMS so I don't think it's MOAR.
I was using the Anthrax Aosp rom a few months ago and noticed I achieved a 4g connection on the upper east side but ever since then I cannot get higher than 1x.
Is there anyone else in NY getting a 3g or 4g connection? Does anyone know what I can do to try to fix this? I am using the MD4 modem (had the problem on MB1 too) and update my profile and prl often. I am really getting frustrated paying for services I can't even use. I am hoping that I won't have to unroot and reset my flash counter to bring the phone to a sprint store.
Sent from my SPH-L710 using Tapatalk 2
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Click to collapse
I'm nowhere near NYC (in fact, Southern California is pretty much as far away as you can get from NYC without going to Alaska or Hawaii), but it sounds like Sprint might be updating their network. I know in many areas (myself included), Data services were extremely crippled when they were installing 4G. I would regularly get 1x in areas where I would get decent 3G. Then a few weeks later, the 3G was back. Then a month or so later 4G was up and running (it's pretty nice here at my work desk). Others have reported similar issues when the network is being upgraded.
So maybe it'd be worth a call to Sprint to see what's up with them. A part of me doubts that most of NYC would be upgraded at once, but maybe in your area there's work going on. It's worth a (relatively) quick call.

Yes, I get 3g and 4g depending where I am. I'm stock rooted md4.
Had that issue once but update profile and prl over wifi fixed it for me.
Sent from my GT-N8013 using Tapatalk HD

I emailed them and they told me there is network outages in my area, but then the guy above me just said he's getting a 3g and 4g connection. Sprint really frustrates me. When I got my phone, it would say I was connected to 3g but after doing speed tests I would only get about 115kbps down. Now I'm using MOAR and it shows 1x and if I do a speed test on 1x its about the same. However, I used to get a 4g connection on 44th street and 6th ave but now I don't. I think I'm gonna go to the store today and ask them. If they tell me to bring my phone in I'll have to unroot it and reset the flash counter :/
Sent from my Nexus 7 using Tapatalk HD

Yes, certain spots in lower Manhattan I get signal but can't use the service. It just don't work. Text won't send or calls won't go thru.
Yes sprint turns on and off the 4g.
Sent from my GT-N8013 using Tapatalk HD

vibes340 said:
Yes, certain spots in lower Manhattan I get signal but can't use the service. It just don't work. Text won't send or calls won't go thru.
Yes sprint turns on and off the 4g.
Sent from my GT-N8013 using Tapatalk HD
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Click to collapse
So I found out what was causing the issue. I went into the ##3282# menu and navigated to Others > HDR/1X Selection and turned it to Hybrid mode and now I can access 3G and I'm gonna test 4G after work.
Sent from my Nexus 7 using Tapatalk HD

Tmobile note 3 slow lte on att

Just made the switch over to att and I am getting really slow lte speeds. Can anybody help?

Fix your APN?
sent from my sm-9005.

@rbiter said:
Fix your APN?
sent from my sm-9005.
Click to expand...
Click to collapse
Tried every APN setting possible already. Searched all the threads and still no help.

There's a thread on here about flashing the AT&T modem and it solving the problem. Plz search and find it...
Here I found it for you..
http://forum.xda-developers.com/showthread.php?t=2522282
Sent from my SM-N900T using XDA Premium 4 mobile app

AdmiralCF420 said:
There's a thread on here about flashing the AT&T modem and it solving the problem. Plz search and find it...
Here I found it for you..
http://forum.xda-developers.com/showthread.php?t=2522282
Sent from my SM-N900T using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Thanks for the advice but I read through the thread already and it doesn't seem like it will improve drastically. So I rather not attempt to flash a modem that may cause a soft brick. My brother has a N900a and gets almost triple the speed of my lte. What gives?

I dont always get fast speeds. I'm guessing at&t phones get higher priority than other phones. There is a build.prop that you can flash/edit that may or may not work. I, myself, haven't made any mods because I get higher speeds usually. Not always. I am on a 900T but using an international 9005 rom with T-Mobile modem still. It really boils down to is the risk flashing a modem or build.prop worth it. In downtown houston I rarely dip below 10mb/s on LTE and occasionally see over 20mb/s. The congestion is real bad here so it is very often I get bumped back down to hspa. Like I said, you have to weigh the risks. I am fine with how it is working now. My post probably hasn't helped you get you where you want to go but it may help you to be content with what you have or may consider flashing an international rom minus modem and see if that helps.
sent from my sm-9005.

I'm on straight talk att sim and it's ridiculous on an att phone I get att quality signal. But with this tmobile phone when home I can only get signal in my bed room by the window . From I walk into building calls and signal dropped dead . It truly sucks. I'm switching back to tmobile as soon as this month is over . I hate paying that extra 30 dollars but a phone is no good in one room .
Sent from my SM-N900T using XDA Premium 4 mobile app

diamantericos said:
I'm on straight talk att sim and it's ridiculous on an att phone I get att quality signal. But with this tmobile phone when home I can only get signal in my bed room by the window . From I walk into building calls and signal dropped dead . It truly sucks. I'm switching back to tmobile as soon as this month is over . I hate paying that extra 30 dollars but a phone is no good in one room .
Sent from my SM-N900T using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I as well am on Straight Talk At&t micro sim and I get pretty decent speeds I believe Straight Talk cap's their LTE speeds at 15 down and I think around 8-9 up which ain't bad for the Chicago area. But there are times where I barely get 2 down and 4 up. I also have a Tmobile Note 3 stock/rooted using a ST sim.

nynexelf said:
I as well am on Straight Talk At&t micro sim and I get pretty decent speeds I believe Straight Talk cap's their LTE speeds at 15 down and I think around 8-9 up which ain't bad for the Chicago area. But there are times where I barely get 2 down and 4 up. I also have a Tmobile Note 3 stock/rooted using a ST sim.
Click to expand...
Click to collapse
The speeds are fine when I actually get a signal . Its the fact that I have dead spots in almost my whole apartment except the rooms located to front of building . It was never like this before .
Sent from my SM-N900T using XDA Premium 4 mobile app

Tmobile Note 3 on ATT Network
I have a Tmobile unlocked phone on ATT and I can't find out anyway to speed up the LTE. I get LTE it seems, but it cuts the speed in half compared to my girlfriend ATT variant Note 3. I tried to flash an AT&T modem to it, but then it would soft brick the device and wouldn't boot. I have tried every APN I can think of, but still no success. I have tried the build.prop, like adding the lines for faster data tweak, but still nothing is getting better. I have full bars, but speed is slow. Do you have any suggestions on what to do, b/c I am out of options. Thanks.

Add me to the list. Just switched over to AT&T from T-mobile, but get very bad speeds. The only reason why I switched over was because with T-mobile, I was getting poor quality signal almost EVERYWHERE, so I had no choice.
I'm curious; if the bands in our phones support the proper AT&T bands and we actually get LTE, it's gotta be a software issue. Modem most likely.

Yeah im sure it has to do with the way the modem is optimized for ATT's 1700 band. I'm also in the same boat and have flashed ATT's modem but it doesn't work. Others have flashed ATT modems but I dont think anyone has been able to successfully see their baseband change in the settings so no one can say whether it worked for sure. I can tell you that the bars have nothing to do with your call signal though, its just your LTE signal strength. If you really want higher signal in your house if LTE seems to drop or be super slow, you should manually switch over to use HSPA+ in your house. Its a pain...i know.
I'm hoping eventually the newer modems fix the 1700 mhz frequency optimization or some devs figure out how to successfully flash N900A modems on the N900T.

LTE speeds
I have great signal almost always it seems like. I have full bars on LTE or 4G/HSPA+, but if I put my sim card in my AT&T variant note I get at least twice as much throughput than with the note 3 tmobile. It has to be a software issue, I have tried to flash att modems with no success. Just got to wait for a tweaked modem. I have even tried tweaking build.prop file and it works a little bit but not much. It is just weird I have full bars with LTE, but I won't be able to get data sometimes, which is really weird. I think there has to be something with the signal bars showing higher dbm that it actually is receiving. Probably another software glitch. Well if anyone has any insight on this issue let us know, please been looking everywhere.

LTE speeds
I think also that the modem is not the only issue. I flashed a kernel today after being on the stock kernel on the T-Mobile and I did a speedtest and the speeds were really low. Flashed another kernel and boom faster speeds back to where I was, maybe higher, but I will monitor to see what happens. But I read that Kernels do affect data speeds sometimes. I am just going to keep looking around to see if any kernels work.

stevestebo said:
I think also that the modem is not the only issue. I flashed a kernel today after being on the stock kernel on the T-Mobile and I did a speedtest and the speeds were really low. Flashed another kernel and boom faster speeds back to where I was, maybe higher, but I will monitor to see what happens. But I read that Kernels do affect data speeds sometimes. I am just going to keep looking around to see if any kernels work.
Click to expand...
Click to collapse
AFAIK it has nothing to do with kernel I might be wrong its just the modem
Sent from my SM-N900T using Tapatalk

Steven
Is there any tweaks that can be done to kinda help the LTE or at least fix my signal bars showing full all the time. I am thinking it is not switching towers when it is supposed to and giving a false signal strength. Is there anything on modifying like you can on Sprint phones with dbm on wimax, where it will switch antennas.

Has anybody flashed the new N900T NE6 based ROMs / modem and seen any difference?

dirrtyswan said:
Has anybody flashed the new N900T NE6 based ROMs / modem and seen any difference?
Click to expand...
Click to collapse
I upgraded the modem and bootloader to the new NE6 version. I'm on Temasek CM11. My observations:
Signal strength is slightly better. Speeds are definitely much better. Prior to the upgrade, I'd get around 6-15/down, 3/up. Now I consistently get 25/down, 10/up.

ajm786 said:
I upgraded the modem and bootloader to the new NE6 version. I'm on Temasek CM11. My observations:
Signal strength is slightly better. Speeds are definitely much better. Prior to the upgrade, I'd get around 6-15/down, 3/up. Now I consistently get 25/down, 10/up.
Click to expand...
Click to collapse
How did you get the new modem to stick? Did you do the triangle away method? If so, did you have to revert to a stock kernel first? I'm trying to upgrade only the modem and leave the bootloader as is. Is that a bad idea?

dirrtyswan said:
How did you get the new modem to stick? Did you do the triangle away method? If so, did you have to revert to a stock kernel first? I'm trying to upgrade only the modem and leave the bootloader as is. Is that a bad idea?
Click to expand...
Click to collapse
It's getting incredibly frustrating to have to repeat this a number of times. I think this morning I had to repeat it already 3 times. Please do a search; there are plenty of pointers on how to get it done. For reference, here is what I did.
http://forum.xda-developers.com/showpost.php?p=52904005&postcount=95

Anyone running pure 4.3 stock

Data and call quality on these custom roms have been fine up until a few months ago. Either It's a fluke and just so happen that I been having issues around the time 4.3 dropped or the rom has issuses. I tried several 4.3 roms and still issuses with data speeds and drop calls. I called sprint and get the towers been updated and there's no outages in your area bull crap or lies of sending a box to boost signal free of charge ****. I never ask on this forum alot I rather figure it out myself but im completely lost. The only thing I haven't did yet was go back to 4.1 stock. My backup to that is gone Thanks to a dead 64 gig sd card and I don't wanna waste my time if the results are gonna be the same. Sprint was great for a year but things are bad took 3 hours to download 3 mb app smdh. I don't wanna leave sprint but I might not have a choice. It's hard to say it's my phone because my wife evo 4g lte dont even see 4g unless she jump on my internet tether or make a call in the bedroom to avoid a drop call. I literally get great coverage everywhere in town but at home. At my mom house I get download speeds of 15mbps all day long and at home download speeds of 0.63mbps and my phone say 4g lte on both really sprint. If you have any suggestions please steer me in the right direction before I blow 450 dollars leaving to another carrier. I would just be happy with no drop calls skip the internet at this point.
If your running stock with that knox mess let me know if things are different with calls or data hell I'll even give cm a try if it works.
Sent from my SPH-L900 using XDA Premium 4 mobile app

Well I think your answer lies in your post. Everything works fine as long as your not at your house you stated. So it is a signal issue on sprints part not software or your phone.
FYI T-Mobile is offering to pay your etf's if you are looking to go that route.
Sent from my SPH-L900 using XDA Premium 4 mobile app

Yeah I was checking that out and about to make that switch today just left the tmobile store just waiting on wife to pick a phone . Sprint been ok but I need better coverage in the midwest these storms and drop calls is not safe . Thanks for the suggestion Im gonna miss this phone. Off to the lg g2.
Sent from my SPH-L900 using XDA Premium 4 mobile app