Develop Bugs

Strange 4G behavior - beyond speed tests

I have been feeling out my 4G connection for awhile now, and I am still having a strange experience with it. Speed tests always give good results, but actually using 4G for daily tasks is not working out well so far. Often times it loads pages and market or maps slower than with 4G...
I had been having this off and on all week, but I thought it was just my poor 4g connection at home. Anyway, now I'm writing from a mall with a very strong connection. Now I'm noticing when I load a page or open maps/market, it actually disconnects from 4G and loads with 3G for a second or two then switches back..
I've been using fresh, dc, and bugless ROMs, and always with the latest radio. I've had to apply the 4G patch a few times to get 4G working, but once it's up, it behaves the same...
Is it the ROM, my phone, or the nature of 4G in philadelphia?

I'd guess it's the nature of the 4g. It's still a new market. One thing, the bars on your phone only show the connection to the tower, not the connection to the internet. My 4g has been like that in places around Dallas, but closer to the heart of Dallas, I get more consistent connection. Someone correct me if I'm wrong, but that just seems to be the nature of technology here on the bleeding edge.
I might add, that for whatever reason, I cannot load my XDA bookmark to the evo 4g page on 4g at all, but it loads fine on 3g or wifi. I have yet to understand that one. Other pages seem to load ok though.

I've also noticed issues on xda, I think it's related to flash. I noticed if I load flash only sites on 4G it never loads or takes a stupid long time... If I cut to 3G it loads fine... On xda, it's the flash ads..

Having the phone process information and display it is much different then just doing a speed test. I'm in Philly also - but only use the 4G for tethering.

rutter9 said:
Having the phone process information and display it is much different then just doing a speed test. I'm in Philly also - but only use the 4G for tethering.
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Click to collapse
I agree completely, but the issue is that, on some pages (usually with flash) It loads and displays the information faster on 3G than on 4G... I'm not sure what would cause that. I'll try tethering and see if it's the same... I'll also try 4G when I'm in central philly...

I wonder if flash determines what quality to stream the content at? Like if you use sprint tv on 4g you will get higher quality video but it can be laggy trying to catch up to the stream. When on 3g the quality is a little less but doesn't skip around at all.

I'm having similar issues with my 4G connection. Some pages won't come up. The progress bar loads up to about 50% then either takes a really long time to bring up the page or not at all. All I get is a blank page. The xda forums are one of the sites I'm having problems with also. It loads up fine over 3G and WiFi. I'm currently running the OMJ rom, latest Radio, and the Fresh 4G fix. I'm not sure if the problem lies with my rooted Evo or the 4G network.

rutter9 said:
I wonder if flash determines what quality to stream the content at? Like if you use sprint tv on 4g you will get higher quality video but it can be laggy trying to catch up to the stream. When on 3g the quality is a little less but doesn't skip around at all.
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Click to collapse
That makes sense to me. Still, it seems strange that the network or phone one struggles to keep up like that. Ah well, like I said, the nature of things out here on the bleeding edge.

i have experienced similar 4g/3g flipflopping behavior and pisspoor wifi. its like the radio is very slow to get a connection as coming out of the pocket and then while in use it will go to 3g then say it's found a 4g and get on that and back to 3g. sometimes i'll see 4g w/ full strength but am unable to do any internet functions (web browser, pandora, meebo, appbrain all fail indicating no network). by putting it into Airplane mode...count to 3...take it out of airplane mode the radio reconnects and is able to pass data as expected.
i have done full cache, delvikcache, (and the other whatchamacallit) formatting between builds. and cleared the cache after updating the radio (even tho i shouldn't need to for Fresh .3)
i have not fussed with App2SD nor anything Flash related.
not sure if i live/work on the "edge" of coverage or if it's EVO (software or hardware) related. I"m leaning more to the coverage at this point. between testing it more as i move around town and next weeks froyo builds maybe the 4g gods will shine down upon me.

Increase WiMAX_Idle_Sleep(s) setting
I had the same issue and found these instructions which show how to increase WiMAX_Idle_Sleep(s) setting.
hit ##DATA# > Edit mode.
Put in your msl code
Chose WIMAX
Scroll down to Wimax_Idle_Sleep
Change the value from 10 to 300.
Click menu, commit changes and restart the phone.
See ' [GUIDE] Easy way to get MSL without calling Sprint or using CMDA Workshop' to get MSL Code, or just call Sprint and ask for it.

mgshultz said:
I had the same issue and found these instructions which show how to increase WiMAX_Idle_Sleep(s) setting.
hit ##DATA# > Edit mode.
Put in your msl code
Chose WIMAX
Scroll down to Wimax_Idle_Sleep
Change the value from 10 to 300.
Click menu, commit changes and restart the phone.
See ' [GUIDE] Easy way to get MSL without calling Sprint or using CMDA Workshop' to get MSL Code, or just call Sprint and ask for it.
Click to expand...
Click to collapse
I work in Philly and have the 3g 4g connection problems too. Your fix did not work for me. No matter what Rom or fix I've tried I can't keep a stable 4g connection without the stock Rom flashed. Sometimes WiFi tether will work on 4g with a custom Rom but anything else and I have all kinds of connection issues. I don't think its the network because 4g connection cards work just fine.
Edit: my main cause of concern is that simultaneous talk and data. I like to be able to talk and still follow sports scores while working. Sticking to stock for now.

Data connection keeps dropping

I'm running my Captivate glide on Orange network (device is unlocked).
I rooted it following all the steps shown in http://forum.xda-developers.com/showthread.php?t=1378082 (BTW, works great thanks).
I kept AT&T rom, but issue happens also with Rogers rom.
This happens only on 3G/3G+ connections.
WiFi works great.
The issue looks quite simple: data connection drops (very) often.
No more email push notifications, ...
Have to go to Settings > Network > Airplane mode : switch it on and then witch it off to get data connection back.
It is not an operator issue. My other phone(s) are using the same and data connection works.
Is this a radio rom issue ? Is there a fix ? (didn't find a thing related to that issue).
Anyone having this issue ?

Depends on how strong your network is, I have experienced this a few times.

I keep getting this now that I have had more experience with it, anyone else experiencing random sharp drops in data speed/connection?

vil33 said:
Depends on how strong your network is, I have experienced this a few times.
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Click to collapse
Well, I have 4 out of 5 bars... Signal looks strong enough to me.
If I use the same SIM card in a HTC MyTouch 4G slide => Works great, no data connection drops at all !
Looks like it depends on what programs are running and using the data connection:
- email push - connection last long enough.
- when I'm running Bejive (IM) - connection last a bit less (before the 1st drop).
- when I add Skype & LoudTalks : almost every 5 minutes connection drops.
I also noticed that after a voice phone call, sometimes data connection doesn't (cannot) restart by itself ...
Here is an idea :
Is there a way to tweak Operator connection like it can be done with HTC phones : GSM + CDMA, CDMA Only ?
Because when you switch the phone to CDMA only, it uses different frequencies and allow to keep data connections while talking on the phone.
Didn't find that option in Captivate Glide settings ...

frav said:
Well, I have 4 out of 5 bars... Signal looks strong enough to me.
If I use the same SIM card in a HTC MyTouch 4G slide => Works great, no data connection drops at all !
Looks like it depends on what programs are running and using the data connection:
- email push - connection last long enough.
- when I'm running Bejive (IM) - connection last a bit less (before the 1st drop).
- when I add Skype & LoudTalks : almost every 5 minutes connection drops.
I also noticed that after a voice phone call, sometimes data connection doesn't (cannot) restart by itself ...
Here is an idea :
Is there a way to tweak Operator connection like it can be done with HTC phones : GSM + CDMA, CDMA Only ?
Because when you switch the phone to CDMA only, it uses different frequencies and allow to keep data connections while talking on the phone.
Didn't find that option in Captivate Glide settings ...
Click to expand...
Click to collapse
Settings --> Wireless and Network --> Mobile Networks --> Network Mode
Didn't make a difference for me using HSPA only.

vil33 said:
Settings --> Wireless and Network --> Mobile Networks --> Network Mode
Didn't make a difference for me using HSPA only.
Click to expand...
Click to collapse
I just checked ... I don't have the "Network Mode" option in "Mobile Networks" section.
I have Roaming, allow data connection, APN, ... but not Network mode.
Weird...
I checked the operator info. Nothing out of the ordinary there.
I'm stuck ...and it keeps happening. No solution for now.

frav said:
I just checked ... I don't have the "Network Mode" option in "Mobile Networks" section.
I have Roaming, allow data connection, APN, ... but not Network mode.
Weird...
I checked the operator info. Nothing out of the ordinary there.
I'm stuck ...and it keeps happening. No solution for now.
Click to expand...
Click to collapse
Maybe try flashing the Rogers kernel and ROM since that's what I have?

vil33 said:
Maybe try flashing the Rogers kernel and ROM since that's what I have?
Click to expand...
Click to collapse
Already did that, but that was a few days ago when looking for the WiFi tethering feature ...
I'll flash it back to Rogers kernel & ROM and test.

Update: Flashed Rogers rom.
Good news is I now have the Network settings back. (AT&T rom is not the right one, for sure !)
Data connection last longer. But the issue is still here.
Still investigating...
Anyone else having this issue ?

the day before yesterday, I went to the copier room in my school and stayed for about 2 hours (too many copying). before i get out, i have no signal (mobile network not available). I need to go out to have signal back or reboot.
It happened again yesterday on the exact same location, I'm going to be there again now.
I believe it might be location wise....in my case at least.

gabby131 said:
the day before yesterday, I went to the copier room in my school and stayed for about 2 hours (too many copying). before i get out, i have no signal (mobile network not available). I need to go out to have signal back or reboot.
It happened again yesterday on the exact same location, I'm going to be there again now.
I believe it might be location wise....in my case at least.
Click to expand...
Click to collapse
I checked, looks like it is not linked to a specific location. I've been travelling and issue kept occuring.
Once data connection is ok, it usually stays up for 2 to 5 minutes, then drops.
"4G" symbol is still displayed - but no more data connection. Web pages not available in browser, no email sync, no more IM, ...
While data connection is down, Cellphone still works, WiFi as well.
It may be linked to an APN issue ... Or definitely a Radio ROM issue.
I'm running Baseband I927RUXKJ5.
Anyone else having this issue ?

When I got the phone the AT&T rep told me there was a known issue with the phone dropping down to lower data speed. He told me if I experienced it to get a new SIM card. Doesn't sound exactly the same but maybe try that?

[Q] internet problems help?

Anyone have a ideal why this is happening? When I am on the Internet 3g sometimes 4g depending on where I am in my house. My Internet dies, I see the 3g icon sometimes the right arrow (up green) but not the left arrow (down orange) under the 3g when Internet dies. So I have to do sometimes is to open a new Window, Even to kick start my youtube app. I have the bookmark Google page. I have to open Google page in a new window to kick the Internet going again, then go back to the window I was trying to open that can't find to open, to get the Internet working again. This kinda started maybe two ago, oh note to add they started with my 4g couple weeks ago in my area, not full. So maybe something to with the towers? Any suggestions will help and thank you all developers for all time,
A little about my phone:
1. Not rooted
2. All My poxxy are all at 0.0.0 etc. -did it months ago, right 0 at the rights spots.
3. My back cover that iam using don't have anything nfc antenna on it, iam sure it dont matter.
4. uag case
5. Setting in settings is on mobile its on cdma/lte I did automatic nothing changed
Thanks again

if they're working on the towers, not uncommon to have network issues.
To get your internet back, just go into airphone mode, and then turn it off. The phone will reconnect.
If it's that bad and inconsistent, you may be able to complain and get Sprint to get you one of those AirWaves thing to let you use your internet to support your phone on the network.

lovekeiiy said:
if they're working on the towers, not uncommon to have network issues.
To get your internet back, just go into airphone mode, and then turn it off. The phone will reconnect.
If it's that bad and inconsistent, you may be able to complain and get Sprint to get you one of those AirWaves thing to let you use your internet to support your phone on the network.
Click to expand...
Click to collapse
Thanks you for the reply, I'll try that just wanted to make it not my phone.

[Q] Slow/buggy/poor data connection and reception

I was originally a Verizon user so I'm not used to this kind of weak connection.
I had my phone replaced already due to another issue a few weeks ago
so I don't want to get another replacement because of this. it is really annoying!
Instead I will ask here and see if anyone could help !
**This has nothing to do with WiFi (because WiFi works great!)**
**And nothing to do with calls because call quality and connection showed no problems**
**Not exactly sure this problem started, just started getting annoyed with it recently**
\- What my phone is doing (when I'm at home) -/
1. Slow transition from WiFi connection
- When I turn Wifi off, I don't get an immediate data reception. Instead it takes about 10 seconds and then I barely start to get 3g..... not lte .... (It's not like this in every place)
2. Not much LTE
- It happens really rarely, most of the time at home the connection is on 3g
3. Lose data connection even while in use
- It's just sometimes unstable. When I'm browsing the web (while in 3g) it would sometimes go down to no bars at all and lose internet connectivity, then the 3g and I have to wait again until it comes back.
- Data roaming automatically turns on saying that I lost connection -_-
4. 3g is sometimes really unresponsive
- Just like when it is when turning off Wifi
- 3g would stay idle for sometime, even when I open apps that require internet
- Sometimes the 3g just disappears and decides not to comeback for a while
5. Bars up and down (drains battery?)
- I see this too often, like in every hour. While in 3g, the bars get suddenly full, then in an instant it drops to 1, then to 2. Then sometimes to no bars at all.
* in LTE it never gets like this, just constantly 1 bar
6. Maybe it's where I live?
- Possibly, but it's quite an urban and Sprint should have no problem covering this area in my opinion
- Verizon wasn't like this (although not perfect)
7. This is annoying
-Because it is draining the battery -_-
-Because my sister's iPhone 6 performs better (always has 2~3 bars) & my brother's S6 (though relatively weaker than her's) does not seem to lose connection compared mine at home (We're all Sprint users)
\- What I've done to confront this problem -/
1) Called Sprint, but didn't help at all. They told me to just take it to the store and have them take a look -__- Agent hardly knew anything...
2) Flashed Stock ROM and hard reset the phone (so annoying since you have to set things up again)
3) Made sure I set mobile data Network Mode to 'AUTOMATIC'
4) Made sure I have the latest Software version and have the PRL and Profile updated
But still no result at this point.
***Could this be a hardware issue? Or a software issue that is fixable?***
Can anyone give me some advice on how to fix this?
I mean it's just that the data reception is too weak an unreliable to think this is okay.
Right now my phone is pretty empty, barely any apps because of the reset.
I really don't want to believe it's due to a faulty hardware!
P.S. Possibly symptom?
The first day I got this phone as a replacement out of the store, I was unable to connect to the internet using data, even though calling was working.
What it was doing was, constantly switching from 3g - lte - inactive 3g - nothing - 3g - so on in a 20 second cycle.
By the end of that day towards midnight it was connecting to the internet.

Welcome to Sprint -_____- my GF has 4G LTE on Verizon where I live and I don't even have 3G, I roam on Verizon actually lol. Sprint literally has ZERO coverage while Verizon has LTE.. It's just Sprint dude lol.

Mobile Data stops working

Hello,
I live in an area (like many of us) there T-mobile service isn't that great. I daily drive through areas with zero service and I have almost no service at my house so we utilize WIFI Calling.
I have been finding for the past few months that when I return to an area of good service (phone showing full bars of 4G or 4G LTE) that I cannot move any cellular data. If I reboot the phone then everything works again for a while. I have tried to toggle into airplane mode and back but this does not help, only a full reboot helps.
Does anyone else get this? Its very annoying to have to reboot the phone when I need to use cellular data. Appreciate some input. Phone is NOT rooted and running the latest available software from T-mobile
M

madas said:
Hello,
I live in an area (like many of us) there T-mobile service isn't that great. I daily drive through areas with zero service and I have almost no service at my house so we utilize WIFI Calling.
I have been finding for the past few months that when I return to an area of good service (phone showing full bars of 4G or 4G LTE) that I cannot move any cellular data. If I reboot the phone then everything works again for a while. I have tried to toggle into airplane mode and back but this does not help, only a full reboot helps.
Does anyone else get this? Its very annoying to have to reboot the phone when I need to use cellular data. Appreciate some input. Phone is NOT rooted and running the latest available software from T-mobile
M
Click to expand...
Click to collapse
It happens all the time for me. I've not been able to figure out why it happens, but I've seen some speculation in other threads where people think it can break when switching between H+, 4G, LTE, etc. Some people have reported that switching to airplane mode and back fixes it, but it doesn't work for me. Only a reboot will fix it for me.
Here is another thread with some discussion on it:
http://forum.xda-developers.com/galaxy-s6-edge/help/mobile-network-data-connection-drops-t3097605

Thanks for the response. I'm not happy to hear it appears to be happening to everyone. I wonder if any of the carriers have reported this to Samsung?
I cleared the cache partition on my phone 2 days ago and I've been good since...that doesn't mean it fixed it but its been a while since I had 2 good days!

THIS HAPPENS TO ME OMG!!! I thought I was going crazy... it happens quite often in NYC where we travel by subway underground... Switching to Airplane mode then back indeed fix it majority of the time, but it doesn't work sometimes...
Also, this happens when i am on Wifi for extended period of time, and then leave WiFi, the phone will show 4G LTE but wont' push any data.
Going into Phone status will show that you have no IP Address...
edit: btw, i've done an exchange with Tmobile, and still happens on the phone, Swapped SIM card as well, doesn't solve the problem. T-Mobile ran diagnosis, and found nothing wrong. I suspect it might be T-Mobile's network configuration...
Also, I can almost 100% reproduce this when I am playing a game that requires periodic connection (like loading acount info), and then playing in the subway while doing data connection between subway station (we have internet at the station, but not in the tunnel) will break my 4G LTE data connection...