Develop Bugs

Poor data speeds after ICS update

I'm in Cincinnati Ohio and have a solid signal on 4g (wimax)
If I run a speed test on 4g and a stock GB rom I get 9.9mbps down and .9mbps up.
If I run the speed test on 4g with the new ota ICS build I get .58mbps down and 1.5mbps up.
What gives? Is this a modem issue? If so, can I use the EL29 modem with an FF18 rom?

Have you tried updating your profile/PRL? You can use any modem you want. Flash it with odin and update profile/PRL after.

I'm playing with PRL's now. I"ve got the sprint corporate one on, but that only alters 3g. I've flashed a stock GB rom back, so I'm going to try a ICS and the EL29 modem now.

Its been poor with ICS. That's why I stayed with GB until everything gets ironed out. I like ICS but the data speeds that comes with it well... sucks lol
Sent from my SPH-D710 using xda premium

droppping from 3g to 1x

for some reason after i flash a rom i will only get 1x and i have to go back to a stock rom to get 3g back. has anyone else had this problem?

Check your prls and modems
Sent from my SPH-L710 using xda premium

i have updated the prls and i was on the latest modem and it was still doing it. then i tried downgrading to LF9 modem with no change. im on the LG2 build.

Which ROM? On Cm10 early builds I only showed 1x but if doing speed tests and looking at dbm signal output I was still getting 3g speeds.

i first tried it on blazer ROM 1.5 then i seen there was an update so i tried 1.6 but got the same thing

i have also just tried it with Team VeNuM's blue themed rom and i have the same outcome

What kind of real speeds are you getting when you speed test? It's entirely possible that you truly only have 1x speeds in your area. Sprint has "strongly encouraged" Samsung and HTC to always show 3G in areas where there is supposedly 3G. Most custom ROMs have corrected this by showing actual speeds in their ROMs. So it could also be that you truly are only getting 1x and the stock ROM is falsely reporting 3G.

ok well now that im home (i was away on vacation in the Poconos) i ran a speed test and got decent numbers this is the results of 3 tests i ran /ping- 92, 77, 76 /download kB/s- 214.6, 236.8, 152.5 /upload kB/s- 78.3, 77.8, 101.6. so i backed up, flashed Team VeNuM's rom and wiped cache but when the phone booted it showed 3g so maybe b/c i was in PA it might have been saying i was in 3g when i really wasnt proving what you were saying jdogg836. so heres the results of the speed test /ping- 121, 134, 206 /download kB/s- 89.1, 67, 64.4 /upload kB/s- 61.1, 28, 58.6 it's showing much slower speeds but im not sure why

makipsee said:
ok well now that im home (i was away on vacation in the Poconos) i ran a speed test and got decent numbers this is the results of 3 tests i ran /ping- 92, 77, 76 /download kB/s- 214.6, 236.8, 152.5 /upload kB/s- 78.3, 77.8, 101.6. so i backed up, flashed Team VeNuM's rom and wiped cache but when the phone booted it showed 3g so maybe b/c i was in PA it might have been saying i was in 3g when i really wasnt proving what you were saying jdogg836. so heres the results of the speed test /ping- 121, 134, 206 /download kB/s- 89.1, 67, 64.4 /upload kB/s- 61.1, 28, 58.6 it's showing much slower speeds but im not sure why
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Call sprint...lots of antennas are only around 60-70% right now....got to do with upgrading system from my understanding...also...upgrade your radio to LG8 and see what happens. :fingers-crossed:

but that big of a drop within minutes? yea im on the LF9 modem i downgraded from the LG2. are people having better luck with the LG8 from the LG2?

makipsee said:
for some reason after i flash a rom i will only get 1x and i have to go back to a stock rom to get 3g back. has anyone else had this problem?
Click to expand...
Click to collapse
Check to see if the time you flashed has the 1x/3g mod... stock Roms only ever show 3g even when they are on 1x..
You can also go into the market and download netmonitor which will tell you your true network type.
I'm almost willing to bet that's the problem.
I too live in pa and most northern parts only have 1x service.. just so you know.
Harrisburg/reading/Lebanon is where you start getting 3g.
Edit. Most of what I said was already explained. Didn't see jdoggs post.
Sent from my SPH-L710 using xda premium

makipsee said:
for some reason after i flash a rom i will only get 1x and i have to go back to a stock rom to get 3g back. has anyone else had this problem?
Click to expand...
Click to collapse
Personally I've has this problem since day 1 with this phone. On Airave it seems worse than being connected to towers for me. Sometimes mine goes from 3g to 1x to no data. Turning mobile data off and on usually fixes the issue. I've tried all radios, no difference, LG8 seems to keep connection longer.

joeyhdownsouth said:
Personally I've has this problem since day 1 with this phone. On Airave it seems worse than being connected to towers for me. Sometimes mine goes from 3g to 1x to no data. Turning mobile data off and on usually fixes the issue. I've tried all radios, no difference, LG8 seems to keep connection longer.
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Click to collapse
If you have the original airave it only has 1x.
The newer version the airvana has 3g coverage..
Sent from my SPH-L710 using xda premium

dtr145r said:
If you have the original airave it only has 1x.
The newer version the airvana has 3g coverage..
Sent from my SPH-L710 using xda premium
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Click to collapse
I've had newer one since the day it came out, no problems with any other phone I've had, just s3. I believe the problem to be the phone, sprint, or my isp.
this message brought to you by my GalaxyS3

I have had modem issues since day one too, I got a new phone because of the poor signal and it's the same.
I tried all the radios this weekend and found no real gains with any. I saw the 1x indicator with the CM10 7/29 build and the AOKP ROM.
Stock based ROM all showed 3G, but it would make sense if they are lying, although I would see 1x in distant lands on my EVO.
I will try the speed test.
It's also worth noting that I have a friend with a stock HTC X one getting about the same signal as me, so it may well be that sprint is messed up here.

lost+found said:
I have had modem issues since day one too, I got a new phone because of the poor signal and it's the same.
I tried all the radios this weekend and found no real gains with any. I saw the 1x indicator with the CM10 7/29 build and the AOKP ROM.
Stock based ROM all showed 3G, but it would make sense if they are lying, although I would see 1x in distant lands on my EVO.
I will try the speed test.
It's also worth noting that I have a friend with a stock HTC X one getting about the same signal as me, so it may well be that sprint is messed up here.
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Click to collapse
I'm not sure at this point, tried everything under the sun, just today I got into the Airvana management page and set it to my router's reserved IP for my Airvana. I think its Sprint also, but you know when I'm right under the Airvana, it seems my s3 keeps solid data connection. This could very well be a weak radio in the S3. All I know is I never had this issue with any previous phones. Maybe 1 day someone will figure this out as Sprint Airave techs are worthless, I feel like I know more than they do!

My problem is even worse since I rooted and flashed AOKP. Hopefully someone can help here. I can make phone calls, it shows 1x, but I don't have a data connection...
Wondering if it is my area. I haven't had issues before. Maybe I should call Sprint to see if they are messing with the towers.
UPDATE: Fixed by flashing stock rom and using the ##72786# in the phone keypad thankfully.

colddonkey said:
My problem is even worse since I rooted and flashed AOKP. Hopefully someone can help here. I can make phone calls, it shows 1x, but I don't have a data connection...
Wondering if it is my area. I haven't had issues before. Maybe I should call Sprint to see if they are messing with the towers.
Click to expand...
Click to collapse
Yuuup.. They are dicking around constantly.
Sent from my SPH-L710 using xda premium

[Q] LG8 Connectivity Issues?

Some basic info: Sprint SGS3; rooted, manually updated to LG8. Otherwise, stock.
Since then, I've noticed that my phone doesn't "hold on" to 4G as well as it did pre root and update. For example, the 4G icon will be next to the signal strength in my status bar then it will disappear, there will just be signal strength with no connection indicator then either 3G or 4G will appear. I don't ever remember this happening before root/update. I haven't flashed anything else on the phone, and the main reason I rooted in the first place was so I could easily tether.
Has anyone else had this same issue?

Its funny that the LG8 update was supposed to help users that were having LTE connectivity issues... this happens to me on occasion too. i would venture to say that a combination of LTE still being in early development and coverage being spotty at times even in areas where u may have gotten full coverage at one point plus the "Connection Optimizer" that often jacks with ur data connection switching between wifi, 3g and 4g(LTE)... try doing a ##72786# to reactivate ur phone on the network... this will automatically re-associate ur data profile with the network and update prl info as well...

+1 I have the same issue
Sent from my SPH-L710 using xda premium

I am envious that you have a LTE signal to lose, I've not tasted any LTE yet 3 weeks after go live of LTE in the Atlanta area

Visionikz03 said:
Its funny that the LG8 update was supposed to help users that were having LTE connectivity issues... this happens to me on occasion too. i would venture to say that a combination of LTE still being in early development and coverage being spotty at times even in areas where u may have gotten full coverage at one point plus the "Connection Optimizer" that often jacks with ur data connection switching between wifi, 3g and 4g(LTE)... try doing a ##72786# to reactivate ur phone on the network... this will automatically re-associate ur data profile with the network and update prl info as well...
Click to expand...
Click to collapse
Thanks for the reply. I'll try the ##72786# and report back with results.
You make a fair point about LTE still getting off the ground, but I will say that pre-root/update, my phone held 4G consistently. Whatever the issue is, hopefully it will sort itself out soon, or enough people will have the same issue that it spurs some action on Sprint's side.
I'm in Houston, FWIW.
Edit/Update: ##72786# seemed to do the trick. HOWEVER, about 15 minutes ago, I attempted to turn on WiFi Tether. My laptop connected with no issues, but about 5 minutes into it, neither the 4G nor the 3G icons appeared next to the signal strength meter. ##72786#'d again, just to see if it made a difference, updated PRL and Profile. Things are holding steady so far, but we'll see how long this lasts.
I'll try to update later in the day.

kindalikemike said:
Thanks for the reply. I'll try the ##72786# and report back with results.
You make a fair point about LTE still getting off the ground, but I will say that pre-root/update, my phone held 4G consistently. Whatever the issue is, hopefully it will sort itself out soon, or enough people will have the same issue that it spurs some action on Sprint's side.
I'm in Houston, FWIW.
Edit/Update: ##72786# seemed to do the trick. HOWEVER, about 15 minutes ago, I attempted to turn on WiFi Tether. My laptop connected with no issues, but about 5 minutes into it, neither the 4G nor the 3G icons appeared next to the signal strength meter. ##72786#'d again, just to see if it made a difference, updated PRL and Profile. Things are holding steady so far, but we'll see how long this lasts.
I'll try to update later in the day.
Click to expand...
Click to collapse
Glad to see it worked. This is by no means a permanent fix. As u flash different roms thru out ur phones life span its a good idea to run this code every so often as flashing can overtime degrade baseband performance as those files dont get replaced with a rom but different roms interact with those files depending on the tweaks made at software level...
Sent from my SPH-L710 using xda premium

jdelano said:
I am envious that you have a LTE signal to lose, I've not tasted any LTE yet 3 weeks after go live of LTE in the Atlanta area
Click to expand...
Click to collapse
I can't wait either. For those that have 4G i'm curious as to what the battery life is like and how much faster the network is on the SG3.

Visionikz03 said:
Glad to see it worked. This is by no means a permanent fix. As u flash different roms thru out ur phones life span its a good idea to run this code every so often as flashing can overtime degrade baseband performance as those files dont get replaced with a rom but different roms interact with those files depending on the tweaks made at software level...
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
The issues cropped up again throughout the day, though not as frequently. I made a post in a reddit subforum and someone there suggested I flash new radios. Any idea on whether that would work, and if so, where/how/what?

kindalikemike said:
The issues cropped up again throughout the day, though not as frequently. I made a post in a reddit subforum and someone there suggested I flash new radios. Any idea on whether that would work, and if so, where/how/what?
Click to expand...
Click to collapse
I tried to flash the LG2 radio and it made no difference at all.

mrg02d said:
I tried to flash the LG2 radio and it made no difference at all.
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Click to collapse
It won't, till Sprint gets their network done. I've been back and forth on all radios, no difference IMO.
this message brought to you by my GalaxyS3 running Phantom's Blazer v1.6

Try this... http://forum.xda-developers.com/showthread.php?t=1816530
Sent from my SPH-L710 using xda premium

That is dissapointing
jdelano said:
I am envious that you have a LTE signal to lose, I've not tasted any LTE yet 3 weeks after go live of LTE in the Atlanta area
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Click to collapse
I am up here in Sugar Hill. Sprint Map shows you deep in LTEville. I worked in Tucker last year when a co-worker got a Verizon Tunderbolt. His 4G was screaming. He was getting 40+ down!
But the map also shows Cumming in LTE land so I drove over there just to see what LTE looked like and I saw the icon flicker on for about 30 sec. but it never really was there.

Naddict said:
Try this... http://forum.xda-developers.com/showthread.php?t=1816530
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
Just flashed back to LG2, so I'll update later and see how things are going.

Super slow Wimax Problems in NYC with ICS

Hi guys,
Sorry to be turning to the forums, but I have no where else to turn. I was hoping I could find a solution here from someone (or a group) of you guys that might be having the same problem. I live and work in lower manhattan, and I have the Sprint Epic 4G touch. I upgraded to ICS manually the day the update came out and people gave directions on how to manually update. Ever since I've upgraded, I've had SUPER slow speeds with 4G. 3G works fine, but for some reason, I cannot get download speeds on my E4GT to get above 43 kbps on the speedtest.net app.
And it's not just there, on anything that requires an internet connection, it does NOT get above 43kbps. Typically it's 2-7 kbps. I mean this is abysmal. When I use 3G it's usually pretty decent (expected 3G speeds). I've gone to the sprint store and the techs there keep telling me that they haven't heard anything in regards to this. And when I try to prove it to them, it always shows regular 4G speeds of about 4-8Mbps. But I mean it's obviously going to be fast, I mean they have a tower right there in the store or above it.
Whenever I'm near a Sprint tower, the speeds are fine. But if I'm 2-3 blocks away, speeds go down to 2-7kbps. It's so frustrating.
I've done a PRL update, Profile Update. Samsung software update, and update firmware in the System Updates section in system settings. I've been updating all these settings countless times over the past month, and I'm still getting the same speeds on 4G.
It's so bad, I'm seriously thinking of reverting back to Gingerbread (EL29) just in the hopes that it fixes the problem. I initially had problems with the ICS update (overheating, batter running out in 2-3 hours, apps crashing, things just all messed up), so what I did then was a factory reset from the System Settings section and it fixed 'some' of the problems. Battery life is still awful, but its at least fixed other issues. But the 4G part is still horrible! It's been that way since I upgraded to ICS manually.
I searched the forum and haven't really seen people reporting the same thing. It's sporadic, but I was hoping maybe someone on here would have a solution or an idea of what might be causing the problem.
In case you need to know, I'm currently on
Model Number: SPH-D710
Android Version: 4.0.4 (Stock ICS update OTA except manually updated)
Baseband version: S: D710.10 S.FF18
Kernel version: [email protected] #3
Build number: IMM761I.FF18
Hardware version: D710.10
If anyone out there has a solution, please let me know. Or any advice. I appreciate anything you guys can offer. Please let me know. If you need to know anything else, please let me know... I'll write back quickly. If anyone else is having any of these problems, please let me know too. It would be nice to know that I'm not the only one having these problems.
Thank you so much everyone. Hope your having a great day.
-AirBruce

It's possible that your phone doesn't play nice with FF18 modem. Every phone reacts different to different modems, so its possible that EL29 was just the modem for your particular phone. From what I gather you aren't rooted, this however, would be your only way to install a custom modem of your choice.

I have the same issue revert back to gingerbread if you want data speeds back. Ive sone evrything in the book to try to fix this and nothing worked.
Sent from my SPH-D710 using xda app-developers app

No need to be rooted to flash a modem with odin, PM me if you need some info.
You can try flashing different modem versions and find out which one work the best for you

You need to try a new modem. On FC24, I have gotten 12+mbps on 4g at work. I used EL29 for a few days and I couldn't get past 2 mbps in the same spot.

revamper said:
You need to try a new modem. On FC24, I have gotten 12+mbps on 4g at work. I used EL29 for a few days and I couldn't get past 2 mbps in the same spot.
Click to expand...
Click to collapse
Im also in NY and yesterday i tried a few different modems as well as Calk's ICS and Blue Kuban and i was only getting about 1 kbps down. No matter what modem i tried. I went back to Calk GB 3.0 on FG31 and that gave me the best 4g. Im also a manager at RadioShack and i've notice that the 3g on GS3 is alot slower than the 3g on my e4gt...so maybe it does have something to do with ICS.

Gingerbread good.
Ics no good. Bad. Crappy.
Pp.
Sent from my ginger infused Mayan calculator.

I also work downtown but I am close to the Seaport. I have always had spotty and inconsistent 4G in my office but when I go outside it gets very good. I am running the latest FG20 Boost modem and it was working well (even in my office) up until there was a bad storm a few weeks ago, I think a 4G tower was affected. That day both my 3G and 4G service went down at my desk, 3G came back a little later but 4G has never been the same.
Trying some speed tests at my desk now on 4G and I am only getting up to 1111kbps but it is more around 600. 3G speeds are bad today as well, I usually get between 200 to 300 and only getting like 50 today.
Update: Just updated to the FG31 modem and my 4G speeds are still the same but my 3G speeds got better while sitting at my desk today. There has to be a 4G tower problem around the downtown NYC area because I never had speeds this slow before.

What modem are you using?

I'm on LG8 right now. Seems fine on store phones. My signal strength is worse. Wanted to check out some others. What are you using and what works well for you?
Switching back to LG2, I'll report back. I know each phone is different and it's also dependent on the area.

chrischoi said:
I'm on LG8 right now. Seems fine on store phones. My signal strength is worse. Wanted to check out some others. What are you using and what works well for you?
Switching back to LG2, I'll report back. I know each phone is different and it's also dependent on the area.
Click to expand...
Click to collapse
Im on LG8 and doing well.
Im also in a market with LTE so maybe thats why.
Ive read others have better luck with LG2 if they are in a non LTE market.

IAmSixNine said:
Im on LG8 and doing well.
Im also in a market with LTE so maybe thats why.
Ive read others have better luck with LG2 if they are in a non LTE market.
Click to expand...
Click to collapse
I figured since LG8 is more fine tuned for the Vision / LTE network, I'd have better luck going back to LG2. I'm testing a battery right now, so I don't want to lose that info. It would reset. Just don't know when to make the jump.
-58 dBm 16asu @ home on LG8 with Airave. Lol. I'll need to turn that off.

Modems
From what I've gleaned from reading several threads on the topic, there is no "global" answer when it comes to modems. Their performance can be different for each phone. There is a great tool developed by clark44 from TeamSonic, click here: http://forum.xda-developers.com/showthread.php?t=1816530 that allows you to flash any of the current modems available from Sprint. I've used the tool several times, and have used each modem for 3-5 days each. I ended up settling on LEN as this gives me the best reception & data speeds for the area I live and work in, a non-4G LTE area