Develop Bugs

[Q] 4G Connection Issue

Hi guys,
I can't seem to get a stable 4G connection on my Epic 4G for some reason. When I toggle the "4G" to "ON", it would connect for a split second and immediately Disconnects and tries to connect again and again. My friend tested his phone (Nexus S 4G) and he connects just fine with data speed of 3,000kbps on Speedtest compared to my miserable 600-700kbps. I've also tried testing this in several different areas including major cities that supposedly cover "4G" and it does the same
I'm currently running SRF 1.2 ROM on Genocide 2.0 Kernel but I believe this issue was present even before rooting my phone. I also tried using different modems (EB13, EC05, EE03, EF02, EG22, EH17) but it made almost no difference to my 4G connection.
Does anyone have any suggestion on this??? I would really like to experience my 4G connection on my supposed 4G phone.

I have the same set up as you, and the same spotty 4g. Sometimes it's very hard to keep a stable 4g connection even in areas where I know 4g has been strong. It disconnects, or it pretends that it is connected but data really isn't going through.
Though, 4g is kinda new to my area and there are rumors that it's still in testing phases. Also, I don't have any input from other 4g users here. So in the end I'm not sure if its just my epic, or if there are wider issues.
Sent from a secret underground bunker

Strong 4g signal
I am also running SFR 1.2 and I get very strong/stable 4g speeds. I live in Chicago (Sprint 4g has been here for a while), and I get 3-4Mbps in my apartment on 4g. This is enough to do things like play Xbox Live or Skype using my 4g. I have noticed that while traveling on trains in the area the connection tends to go on and off, but I would say that overall, I usually have a great connection.
This may just be in your area, where are you located?

mjben said:
I have the same set up as you, and the same spotty 4g. Sometimes it's very hard to keep a stable 4g connection even in areas where I know 4g has been strong. It disconnects, or it pretends that it is connected but data really isn't going through.
Though, 4g is kinda new to my area and there are rumors that it's still in testing phases. Also, I don't have any input from other 4g users here. So in the end I'm not sure if its just my epic, or if there are wider issues.
Sent from a secret underground bunker
Click to expand...
Click to collapse
I have the same issues, even though the Sprint coverage map shows I should be able to get 4G inside my house.
After researching, what I have found is you must find the nearest Sprint tower that has 4G, hold your left hand directly on the control board of the tower, and while placing your right big toe directly on the battery of your phone (must be the right big toe, the left big toe will not carry current correctly), you must complete the following key sequence on the dialer (###WTF***4G###***). Only then will you receive a 4G signal. Now be aware this will only enable the signal to last for 15 seconds. If you need more time that that, you must repeat the process. Oh...and By the way...This will only get you 1 bar of 4G service. I will be working on a detailed guide for 2 bars. There is no known method to actually get 3 bars of 4G service!!
Sorry, but this is a good of an explanation as anyone from Sprint has given me.
You may now return to your normally weak 3G Sprint signal.

Goodroid said:
Hi guys,
I can't seem to get a stable 4G connection on my Epic 4G for some reason. When I toggle the "4G" to "ON", it would connect for a split second and immediately Disconnects and tries to connect again and again. My friend tested his phone (Nexus S 4G) and he connects just fine with data speed of 3,000kbps on Speedtest compared to my miserable 600-700kbps. I've also tried testing this in several different areas including major cities that supposedly cover "4G" and it does the same
I'm currently running SRF 1.2 ROM on Genocide 2.0 Kernel but I believe this issue was present even before rooting my phone. I also tried using different modems (EB13, EC05, EE03, EF02, EG22, EH17) but it made almost no difference to my 4G connection.
Does anyone have any suggestion on this??? I would really like to experience my 4G connection on my supposed 4G phone.
Click to expand...
Click to collapse
Whts your location cause I am having the sam exact problems with my epic and evo!
Sent from my SPH-D700 using XDA App

Telus: 4G LTE turned into H+ ?

When I first got my galaxy s3, telus said it would come with 4g lte. It worked well and on the top notification section, it specifically said, 4g lte. Now I'm trying out custom roms and such, and I downloaded CM10. However, on CM10, the icon no longer says 4g lte, but it says H+. When I revert back to my old rom, it says 4G (ONLY 4G, no LTE at the end). Can anyone tell me why my data connection has been demoted, or if it has been demoted at all? Should I just give Telus a call and ask whats up with this?
And yes, LTE is available in my area, I'm in Vancouver.
Thanks

sulihpoeht said:
When I first got my galaxy s3, telus said it would come with 4g lte. It worked well and on the top notification section, it specifically said, 4g lte. Now I'm trying out custom roms and such, and I downloaded CM10. However, on CM10, the icon no longer says 4g lte, but it says H+. When I revert back to my old rom, it doesn't say 4G (i ahven't seen it say LTE at the end yet though). Anyone can tell me why my data connection has been demoted, or if it has been demoted at all? Should I just give Telus a call and ask whats up with this?
And yes, LTE is available in my area, I'm in Vancouver.
Thanks
Click to expand...
Click to collapse
I have the same problem: I have ATT, since using custom ROM (TASK ROM) i have lost LTE, even though the APN settings are correct, the only way that i've have gotten LTE back is by going to the store and getting a NEW micro-SIM , then LTE works, and to answer your question, H+ is just HSDPA+ and 4G is LTE.

40mpg said:
I have the same problem: I have ATT, since using custom ROM (TASK ROM) i have lost LTE, even though the APN settings are correct, the only way that i've have gotten LTE back is by going to the store and getting a NEW micro-SIM , then LTE works, and to answer your question, H+ is just HSDPA+ and 4G is LTE.
Click to expand...
Click to collapse
Thanks!
And just for clarification: when you got the new micro sim, were you able to combine both the custom rom and 4g lte? Or is it one or the other?

yeah apparently in canadian carriers, they're changing up things, like for example our rom on ics, i get 4g and LTE even tho im on 4g plan but s3 is LTE but some custom roms such as cm9,10,miui,aokp and so forth have things setup to h+ and for example even tho you might LTE speeds on cm10 via toggle of LTE on, it'll still show 4g meaning it is LTE but its just how structure in systemui is setup. eventually we all hope it'll change, best way to find your speeds and confirm what you're getting is Speed test via market and it'll tell u all.. hope it all helps
edit and it'll also depend which towers are setup in which configuration, such as if you're closer to main junction of cities for example Toronto for me, i'll get LTE like whoa but say im in brampton now it might have towers catching LTE but not as frequent hence it'll fallback on 4g.

AOSP ROMs will always be G, E, 3G, H, H+, 4G
G - GPRS
E - Edge
3G - 3G
H - 3.5G down
H+ - 3.5 G up/down
4G - LTE

BNaughty said:
AOSP ROMs will always be G, E, 3G, H, H+, 4G
G - GPRS
E - Edge
3G - 3G
H - 3.5G down
H+ - 3.5 G up/down
4G - LTE
Click to expand...
Click to collapse
yeah like as i was saying structure is based upon that. the reason why those structures don't change is because vanilla roms aka aosp roms are not just based on 1 type of device but 1000 of devices so you can imagine, doing 1,000 different things, ahh id go nuts haha

wali01x said:
yeah like as i was saying structure is based upon that. the reason why those structures don't change is because vanilla roms aka aosp roms are not just based on 1 type of device but 1000 of devices so you can imagine, doing 1,000 different things, ahh id go nuts haha
Click to expand...
Click to collapse
Well it's just a more accurate representation of what you are connected to... Despite what all the carriers say, the stock rom only saying 4g, is NOT 4g... it's 3.5g which is better represented with H, and H+.... Marketing schemes really... True 4G is LTE...

BNaughty said:
Well it's just a more accurate representation of what you are connected to... Despite what all the carriers say, the stock rom only saying 4g, is NOT 4g... it's 3.5g which is better represented with H, and H+.... Marketing schemes really... True 4G is LTE...
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Click to collapse
yes sir, true it is marketing schemes haha i didn't wanna say it out loud but hey sometimes you gotta do those things to sell =) right ,as carrier perspective if they can sell all the stock for the devices and make the money they're happy, and we're happy lol.

I've noticed with my device that LTE coverage, at least in my local area, is fairly sparse, but occasionally present nevertheless.
If you're not seeing it at all, you might check that LTE is enabled in two places: check Settings -> More -> Mobile Networks -> Network Mode for an LTE setting; and dial *#*#4636#*#* to pull up the Testing menu, go to Phone Information, and check "Set Preferred Network Type" for an LTE setting. Doing both of these allowed my phone to start seeing the LTE network.

lte preferred network not working?

I live in Dallas tax and according to the coverage map lte is all over. When my preferred network settings are set to lte/ cdma it never connects to lte goes to 3g for a few minutes then disxonnexts. Switch my preferred network settings to cdma and 3g is always connected. Could this be a cyanogen issue or do most people deal with this? Any help would be appreciated.
Thanks

Sprint's marketing department figured it'd be better to show LTE coverage of completion. Unfortunately, your area is probably not covered yet, but will be once the city is completely upgraded.

So basically I need to leave it in CDMA preferred network mode to keep it connected?

ws669 said:
So basically I need to leave it in CDMA preferred network mode to keep it connected?
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Click to collapse
LTE coverage would be a Sprint problem - the random disconnects are timeouts through eHRPD via Cyanogenmod RIL issues. It wont timeout on you on other ROMs, but if you place it onto CDMA only, you'll be fine.
Until Cyanogenmod fixes the problem, the random LoS (Loss of Service) issues will continue.

If you download and use Sensorly, it shows actual coverage, where actual users have picked up LTE coverage.

Anybody know of good ROMs that don't have this issue? My friend said aokp is good but he's on a different carrier, any thoughts?
Thanks

I was using AOKP and was having this same issue... assuming it's because they get a lot of their code from the CM repos.
I ended up trying out a few different TW ROMs and my signal strength was amazing with any of them. Currently I'm using FreeGS3 ( http://forum.xda-developers.com/showthread.php?t=1748818 ) and have no real issues.
The only thing that bugged me about the TW ROMs is some of the default apps like Email/Exchange, but I just replaced those with the APKs from AOKP and everything is fine.
If the signal issue gets fixed in CM/AOKP I would be more than willing to jump back, but the massive difference in signal strength is too much for me to not use a TW ROM.

ws669 said:
Anybody know of good ROMs that don't have this issue? My friend said aokp is good but he's on a different carrier, any thoughts?
Thanks
Click to expand...
Click to collapse
All AOSP roms are based off CM10 github, so they're all going to have the issue. AOKP is a little dated now 11/10 build doesn't have LoS, but it doesn't connected to Ehrpd either. The issue is, once LTE connection is established, and you move outside an LTE area, you go LoS for a bit (some say 20 seconds, others say 5 minutes). But it wont lose signal until LTE is dropped.
EDIT: the cm10 timeouts were after the LJ7 blobs were implemented, which I believe were 11/11 and after.

This is also happening on stock jb.
Sent from my SPH-L710 using xda app-developers app

thanks for the info, going to flash the tm rom when I get home.

Im in Dallas as well and its still being built out.
I get 3G at home, closer to down town. I get stable and steady 4G LTE at work, near Abrams and NorthWest HWY. In fact at my office on the 4th floor im on 4G LTE all day, ride the elevator down and by the time i get to my truck in the parking lot back to 3G. Drive a minute down the road and it might go back to 4GLTE again.
Luckily for me at my office on the 4th floor i get 4G LTE strong enough it holds the signal and isnt constantly switching.
The odd thing is a couple times a week my phone will switch to 4G LTE at my residence but when this happens i get no data on my device. I have to wait for it to go back to 3G to get data back. I think its a tower issue.

I'm having the same experience. LTE usuallys drops quickly. I get it in my apt and it is pretty fast. I live in Richardson. I experience LOS when I try to go from 4g to 3g. It drops the call everytime.

Well damn, hopefully they hurry and build out the network around dallas

ws669 said:
Well damn, hopefully they hurry and build out the network around dallas
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I think thats the sentiments of everybody on Sprint with an LTE device.. No matter where they are..

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[Q] Need help on signal and 4g/lte

Hey guys,
I was just told that tmobile has launched lte in our area, Dallas tx(not sure). At the time I was trying to flash the latest custom roms, I got a problem.
My case is on modem UVBMD1 rom Jedi x14, I have 4g 15mps down and 3mps up, but only 2 bar signal
Modem UVBMD1 rom Jedi master 14, I have 4glte 22mps down and 3mps up, still 2 bar signal
Modem UVBMD1 rom original odexed-rooted, I have 4g 8mps down and 1mps up, full bar signal.
I do not understand why it has so many different speeds on the same modem and same android 4.1.2. Still not sure if anyone in Dallas has real LTE already.
Thanks guys.

Update,
Trying several different setting, realized that when the network option set to automatic 2g/3g/4g, it has full bar signal and 8mps down. When it was set to automatic 2g/3G/4g/lte, it has only two bars and 23mps down. Does it mean there is something wrong with the modem?

bloodloon said:
Update,
Trying several different setting, realized that when the network option set to automatic 2g/3g/4g, it has full bar signal and 8mps down. When it was set to automatic 2g/3G/4g/lte, it has only two bars and 23mps down. Does it mean there is something wrong with the modem?
Click to expand...
Click to collapse
Im in Dallas, Have a Nexus 4, Note 2, HTC One.
I can tell you that on my stock Note 2 LTE will give me a solid connection but a low signal strength indication. So 1-3 bars. But i can still pull down 20-30 megs down. Since im on stock its 4G LTE icon and not just 4G.
When your getting the full bars at 8 megs your on the HSDPA+ network. When your getting 23 down with 1-2 bars your on LTE.
Id suggest getting the app SignalCheck Pro.
https://play.google.com/store/apps/details?id=com.blueline.signalcheck&feature=search_result#?t=W251bGwsMSwyLDEsImNvbS5ibHVlbGluZS5zaWduYWxjaGVjayJd
I have used this app many times to check my signal strength and to also let me know when im connected to LTE while im driving around.

IAmSixNine said:
Im in Dallas, Have a Nexus 4, Note 2, HTC One.
I can tell you that on my stock Note 2 LTE will give me a solid connection but a low signal strength indication. So 1-3 bars. But i can still pull down 20-30 megs down. Since im on stock its 4G LTE icon and not just 4G.
When your getting the full bars at 8 megs your on the HSDPA+ network. When your getting 23 down with 1-2 bars your on LTE.
Id suggest getting the app SignalCheck Pro.
https://play.google.com/store/apps/details?id=com.blueline.signalcheck&feature=search_result#?t=W251bGwsMSwyLDEsImNvbS5ibHVlbGluZS5zaWduYWxjaGVjayJd
I have used this app many times to check my signal strength and to also let me know when im connected to LTE while im driving around.
Click to expand...
Click to collapse
I guess tmobile should release a new version of modem to fix this problem. So sad that you have the same issue. But still enjoy the 22mps down. Thanks dude.

I think we can all expect signal-strength fluctuations, changing availability in types of service, and general wonkiness for at least the next month or so while TM finishes rolling out LTE in the various markets. It's not like they just flip the switch and it's all set - they have to test and tweak.

bloodloon said:
I guess tmobile should release a new version of modem to fix this problem. So sad that you have the same issue. But still enjoy the 22mps down. Thanks dude.
Click to expand...
Click to collapse
Software updates take time.
Problems have to be reported by the masses, then the manufacturer has to try to fix, then it goes to the carrier for approval and small groups of beta testers, then out to the masses.
The good news is, with small system updates like radio firmware, modems and stuff, those do push out much faster then major updates. BUT sometimes they want to put them in with major updates.

bloodloon said:
Hey guys,
I do not understand why it has so many different speeds on the same modem and same android 4.1.2. Still not sure if anyone in Dallas has real LTE already.
Thanks guys.
Click to expand...
Click to collapse
Tweaks, init.d mods, etc.... also varies from interference, congestion. Not sure what your entire claim is that tmobile needs to fix but its seems to make little sense as there is no REAL issue just different speeds based on tests that have multiple variables.

Im in Dallas, as i stated in my other post. Ive been getting solid LTE at Home, Old East Dallas and at work. NE Dallas near NW HWY and Skillman.
Ive had solid LTE since they flipped the switch the night of the 16th of June.
Thats on my Note 2, Nexus 4, HTC One.
I have also driven thru parts of Dallas that still give me 4G which is HSDPA+. While they are still working on it i can tell you from first hand experience this is going way better then the Sprint roll out of LTE. I was with Sprint for 11 years and left them in January for T-Mobile. What a nightmare that was.
Anyway, to answer your question about LTE in Dallas its a Yes for me.

I'm in Columbus Ohio and I had to remove the automatic lte/4g/3g/e they seem to be testing lte here. When data is accessed it works breiefly then drops all the way down to no signal. ...then sits at E...then to 4G...then if I don't use my phone....it goes up.....to lte...so I just removed it from searching for lte....now my 4g speed is consistant...until lte is stagnant stable and live...im good
Sent from my SGH-T889 using Tapatalk 4 Beta

IAmSixNine said:
Im in Dallas, Have a Nexus 4, Note 2, HTC One.
I can tell you that on my stock Note 2 LTE will give me a solid connection but a low signal strength indication. So 1-3 bars. But i can still pull down 20-30 megs down. Since im on stock its 4G LTE icon and not just 4G.
When your getting the full bars at 8 megs your on the HSDPA+ network. When your getting 23 down with 1-2 bars your on LTE.
Id suggest getting the app SignalCheck Pro.
https://play.google.com/store/apps/details?id=com.blueline.signalcheck&feature=search_result#?t=W251bGwsMSwyLDEsImNvbS5ibHVlbGluZS5zaWduYWxjaGVjayJd
I have used this app many times to check my signal strength and to also let me know when im connected to LTE while im driving around.
Click to expand...
Click to collapse
Thanks for this information, I thought it was only me. Good to see that there's nothing to worry about!

Question about 4g data

Hey guys,
I just switched from Verizon to t mobile and I have a question about their data connection.
I know they have 4g and 4g lte but are you suppose to get data while on regular 4g?
Whenever I'm on 4g I get no data even with full bar. I am currently on Jedi V5.
Thanks in advance.

Yes. Data should work at all times. Even on 4G.
Sent from my Galaxy Note 3

bryanthomas007 said:
Yes. Data should work at all times. Even on 4G.
Sent from my Galaxy Note 3
Click to expand...
Click to collapse
Any idea why there is no internet with full bar on 4g? Or how I can fix it?

hslayer said:
Any idea why there is no internet with full bar on 4g? Or how I can fix it?
Click to expand...
Click to collapse
you need to further explain in detail what is happening on your phone? maybe a video or something.

XxLostSoulxX said:
you need to further explain in detail what is happening on your phone? maybe a video or something.
Click to expand...
Click to collapse
I have full bar on 4g and i try to load page on my browser and it doesn't load, same thing with apps that require internet connection, they will not work

hslayer said:
I have full bar on 4g and i try to load page on my browser and it doesn't load, same thing with apps that require internet connection, they will not work
Click to expand...
Click to collapse
lawl tmobile sucks....no but seriously, i would recheck your apn settings, make sure theyre all in order...otherwise...thats strange, i know that i have LTE all the time, but if i make a phone call, i drop to 4G because the LTE Radio has to be disabled temporarily when im making calls, which is understandable, the only other thing i can think of is T-Mobile being at fault for some kind of issue on their end. but if you can check your apn settings and try again see what you come up with.

the SAME thing happens to me. I believe it has todo where we live? Anyways in my house when I do loose LTE and get even full bars of 4G its worse then 3G. Half the times it says no connection other times it takes forever to load. I tried going in and out of airplaine mode tried turning ut off and on ect. Also tried to dial##2263## and don't work on my phone. Maybe because of the ROM? But yea my 4G is crapppp.
Sent from my SM-N900T using Tapatalk

I also am in the middle of switching over from Verizon to T-Mobile. This is going to be a really hard decision to stay or not. In terms of Data, T-Mobile is no where near Verizon even if they have faster speeds on SOME of their towers. Verizon is very solid and I just always have Data. It isn't something you ever even think about. T-Mobile on the other hand is very hit and miss. When it is good, it is very good but when it isn't, well it isn't.
So to get to you problem, I am seeing the very same thing with my two completely stock Note 3's. I just took a trip this weekend up the cost (Los Angeles to Pismo Beach up HWY 101) so I got to see the how the network does on a trip. for MUCH of the trip, I had a very strong 4G signal but had EXTREMELY slow data speeds, It was basically unusable. Google Maps for example was completely unusable since the map wouldn't update with this extremely slow or no data connection. What I am seeing with T-Mobile is that the connection type indicator such as 4G has 0 to do with what speeds you are going to get. Many of the 4G towers I was on was only giving me download speeds in the range of 0.1 to 0.01 Mbps.
I am within an excellent range for the tower at my house, I can actually see it from my house with no interference between it and me. My speeds on what shows to be a strong 4G signal is Ping = 644 ms, Download = 0.69 Mbps and upload = 0.85 Mbps.But again, on my trip, there were many times that full bars of 4G gave me no response to anything I tried to do that required Data.
T-Mobile may have the fastest speeds when you can get them but there are WAY to many towers and that have 0 to very slow speeds on major highways! You can't even use Google Maps on US HWY 101?
I really want to stay on T-Mobile but coming from Verizon it is a huge step backwards in terms of data reliability. If I do end up staying, I really hope they start concentrating on making the data network actually usable when you are driving around. I would rather have 4 or 5 Mbps of speed on every tower vs 25+ Mbps on some towers sprinkled around that your lucky if you live next to one.

chuko303 said:
the SAME thing happens to me. I believe it has todo where we live? Anyways in my house when I do loose LTE and get even full bars of 4G its worse then 3G. Half the times it says no connection other times it takes forever to load. I tried going in and out of airplaine mode tried turning ut off and on ect. Also tried to dial##2263## and don't work on my phone. Maybe because of the ROM? But yea my 4G is crapppp.
Sent from my SM-N900T using Tapatalk
Click to expand...
Click to collapse
if you are running a touchwiz rom its *#2263#