Develop Bugs

How to fix horrible Wifi reception after fc07 venum rom?

Okay so I was trying all the ics leaks over the past few weeks, always had good wifi too but then venum made one so I tried it. I noticed my wifi had a low signal even tho I was sitting next to the hotspot.. so I flash to calkins rom and I still had the same issue. I even went back to calkins el29 rom and the problem still remained.. I've tried changing modems a few times didn't help. There's nothing wrong with the hotspot my brothers stock epic touch and my HTC flyer get perfect signal. And its not any slower.. it just won't reach anywhere but in the living room... can some one help me fix this ://
Sent from my SPH-D710 using xda premium

dspain28 said:
Okay so I was trying all the ics leaks over the past few weeks, always had good wifi too but then venum made one so I tried it. I noticed my wifi had a low signal even tho I was sitting next to the hotspot.. so I flash to calkins rom and I still had the same issue. I even went back to calkins el29 rom and the problem still remained.. I've tried changing modems a few times didn't help. There's nothing wrong with the hotspot my brothers stock epic touch and my HTC flyer get perfect signal. And its not any slower.. it just won't reach anywhere but in the living room... can some one help me fix this ://
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
Have you updated your PRL and profile?

You have no worse or better signal now. If you'd have read all the bug reports before blindly jumping to ICS, you'd know that the signal bars for all ICS builds are screwed up. It seems totally random when it displays or decides NOT to display signal.
You don't HAVE an actual signal issue, you have a display issue. Install a dB monitor and you'll see this and confirm for yourself.

Compusmurf said:
You have no worse or better signal now. If you'd have read all the bug reports before blindly jumping to ICS, you'd know that the signal bars for all ICS builds are screwed up. It seems totally random when it displays or decides NOT to display signal.
You don't HAVE an actual signal issue, you have a display issue. Install a dB monitor and you'll see this and confirm for yourself.
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Click to collapse
The title suggests that Venum ROM screwed up your wifi which I don't think is possible. I have been using 2.1 since it same out and wifi is fantastic on it just like it has always been on this phone. It stays connected even if I walk 2 houses down from me
Sent from my SPH-D710 using xda premium

I knew about that bug but that doesn't explain why on 2.3 I can't get Wifi on my epic in my moms room where my flyer has perfect signal I'm not on 4.0 anymore... :/
Sent from my SPH-D710 using xda premium

Signal Strength on E4GT ICS Is Erratic

My signal strength is jumping around like crazy...from -106dBm then back up to -64dBm...and everything in between, in a matter of seconds. This has been happening since FD24.
I have been using Sfhub's stock rooted nodata roms. I tried the FD02 kernel repack with rougue recovery on FD26 rom & modem, and it seemed to jump around alot less.
Could the kernels be the issue? Or the modem? or the Rom itself?
Update for FF02:
FF02 seems to be better for now...will do some tests later. I had it jump around only once yesterday.

Try throwing your phone at the wall, fixed mine
Sent from my SPH-D710 using xda premium

Rinzler said:
My signal strength is jumping around like crazy...from -106dBm then back up to -64dBm...and everything in between, in a matter of seconds. This has been happening since FD24.
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Click to collapse
If it is jumping fro -106 to -64 and back, it is probably scanning because it lost signal. When you first boot your phone, often it exhibits the same scanning behavior.

sfhub said:
If it is jumping fro -106 to -64 and back, it is probably scanning because it lost signal. When you first boot your phone, often it exhibits the same scanning behavior.
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Click to collapse
That's what I figured...and that fact is absolutely murdering my battery life.
You think a data reset will help?

I wouldn't say there is a great chance, but the possibility exists.
The "cleanest" install possible is the following:
1) install Full ODIN OneClick
2) remove external sdcard, if any
3) from android, format internal sdcard
4) from android, perform ##786# reset (providing your MSL, which can be retrieved via "getprop ril.MSL" from terminal or adb shell)
If you format your sdcard, make sure you move your backups to your PC or other external storage.

What does the ##786# reset do exactly?

Rinzler said:
What does the ##786# reset do exactly?
Click to expand...
Click to collapse
It resets NVRAM as well as your Android user data.
You dial ##786# in the dialer on a stock rom.
It will reset stuff like your phone #, your data login, and other values stored in nvram.
It will cause your phone to perform hands free activation at the next boot, which will populate that information again as well as update profile and prl.
Hands free activation only works on Sprint's native network so don't do it in a place where you can't reliably get signal.

Anybody else having this problem?

Rinzler said:
Anybody else having this problem?
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happened to me right after i flashed fe07 modem. i moved back to fd26 to see if its the towers or modem. all seems fine, but i will be keeping an eye over the next day.

FE07 had absolutely abysmal 3G data speeds. It took so long to download the Facebook app update that I immediately flashed an older modem to check against it - FC24 runs like a CHAMP.

I tested fe07 for a day or so. I didn't notice much other than it would drop to 1x often. I ran a speed test 3/4g between fd26 and fe07. Fd26 clearly performed better for me. I went back.

Still rockin EL29 here. All the new modems sofar for me have sukt dik. And YES I let them settle in B4 pulling any test. SOOOO I dont want to hear the BS here, like whatwent on with my other post in a similar topic. Yeah got me sum points taken away..lol..

Indrid Cole said:
Still rockin EL29 here. All the new modems sofar for me have sukt dik. And YES I let them settle in B4 pulling any test. SOOOO I dont want to hear the BS here, like whatwent on with my other post in a similar topic. Yeah got me sum points taken away..lol..
Click to expand...
Click to collapse
Updating profile is what's important. there's no settling in. Im using ek02. It's the most stable (IMO)
Sent from my SPH-D710 using XDA

revamper said:
Updating profile is what's important. there's no settling in. Im using ek02. It's the most stable.
Sent from my SPH-D710 using XDA
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Try ta tell that to some of the fools in here. Then bam a mod from a completely diff forum or wherever he is from hands me a infraction. Oh well. It is fun to flame. Fuk um.

Lol

I don't discuss modems because for every release 1/3 think it is better, 1/3 think it is worse, and 1/3 think it is the same.
No matter what you say, some people are in violent disagreement.
Just pick what works for you.

Fe07 is the best ever in history until the next best release!
Sent from my SPH-D710 using xda premium

I got the "you roamed too much call" yesterday. I don't force roam ever because I'm in FL and force roam doesn't work here with sammy phones.
I was running several of the recent modems last month and used 5GB of data roaming. Almost 100% of my data. Was the first and only month this has ever happened....in 8-9 years. I reverted back to older modem and roaming stopped. This was on top of the fact that I keep wifi on at all tines at home because my house is a dead spot. I also have an air rave (whatever its called).
I only listen to music, email and surf web. Quite surprised by the call.
I explained to rep that I only go to work and home. That for whatever reason home and work are dead zones. Of course he checks and tells me coverage is great in my city. Then he says sprint can boot me, or I can ask to switch for free. Told him I didn't want either. His solution was for me to put setting for roaming sprint only. I asked him how I would use my phone if I only roamed sprint? No answer.
Very frustrating since I wasn't force roaming, have 6 lines and can't afford other carrier and I actually like sprint.
Sent from home How do I turn my phone on?

My phone came with El29, and after seeing loss of signal often I started experimenting with modems. Tried fd19, fd24, fd26, and fe07, and I still get bouts of loss signal. It's not an issue of bad reception, because my OG epic has no signal problems.

Hows the signal on FE10?

Best ROM for voice signal issues

My story begins when i got my new shiny D710 over a year ago. I loved the stock ROM that it came with (i wish i knew what version it was). Battery life was great! Signal was good inside my basement apt. i mean, i had 2 to 3+ voice bars and call quality was good in NYC.
updates kept coming through and then came the dreaded ICS update nightmare. every call was a dropped call or just no signal at all (stop sign). i gave the updates another month or two to see if anything got better, and it did not. i made a bold decision to wipe my entire phone completely and go back to GB EL29 stock, which came rooted. I was lucky enough to move into another decent apt. on an upper floor but STILL had really bad voice signal strength on EL29, 1 bar or no signal at all. it takes about 10 minutes for roaming to kick in, then it disappears after my call is completed. is it my phone or my ROM? Can anyone suggest a ROM that enhances the voice signal? it doesnt have to be GB, but i do enjoy it's battery life without having to install/tweak crazy battery saver apps. 4G data gets a full strength signal so i dont know what i am doing wrong.
My emergency flip phone from virgin mobile prepaid has full bars compared to this thing! both are CMDA!

I myself live in NYC and for me I was using Stock Rooted FL16. That gave me pretty decent battery life as well as pretty good signal. But battery life is different for everybody and every device. Hope that helps.. :thumbup:
Sent from my SPH-D710 using xda premium

Try different modems. There is a sticky in the development section.

funny how i am getting full bars inside my apt. while voice roaming. is sprint limiting my call capabilities on purpose? roaming on another carrier is a no brainer. it doesnt seem like the phone is the issue. i might just give FL16 a shot. is there no way to keep voice roaming ON all the time?

There's an app called "Roam Control" by MrGreg for rooted phones where you can force roam. "Not roam control" is in Google Play Store, you can get Roam Control at the developer's website
Sent from my SPH-D710 using xda premium

Try changing your prl. If concerned about battery life try a diff GB modem.
Pp.
sent from a jellybean filled epic touch.

someguyatx said:
Try different modems. There is a sticky in the development section.
Click to expand...
Click to collapse
I absolutely agree with this. It sounds like your problem started when you received an OTA update that changed your modem.
If you flashed a rom zip file, it did not change the modem. The modem must be flashed separately. Try flashing a GB modem.
If you want to use a GB rom, I suggest Caukulin's v3.0. Everything works perfect and the battery life is the best I have ever had on this phone.
I was never able to get a good signal at home. I can go about 1/4 mile in any direction and get a good signal. I got tired of dropping nearly every call so I solved the problem by using a custom prl that uses Verizon's towers. Haven't had a dropped call since.
Sent from my SPH-D710 using Xparent Cyan Tapatalk 2

jaxon01 said:
I absolutely agree with this. It sounds like your problem started when you received an OTA update that changed your modem.
If you flashed a rom zip file, it did not change the modem. The modem must be flashed separately. Try flashing a GB modem.
If you want to use a GB rom, I suggest Caukulin's v3.0. Everything works perfect and the battery life is the best I have ever had on this phone.
I was never able to get a good signal at home. I can go about 1/4 mile in any direction and get a good signal. I got tired of dropping nearly every call so I solved the problem by using a custom prl that uses Verizon's towers. Haven't had a dropped call since.
Sent from my SPH-D710 using Xparent Cyan Tapatalk 2
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Thank you so much! I didnt realize that the modem would have not changed! You are awesome!!! If I use a custom prl, would that mean that my data is also roaming or just the voice?

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Data speeds went to crap after md4 update

Stock non rooted. Did the md4 update last week and data speeds really blow now. Also, battery seems to drain faster. Anyone else have these issues?
If this has been talked about already sorry, I didn't find anything in a search.

AdRock02gt said:
Stock non rooted. Did the md4 update last week and data speeds really blow now. Also, battery seems to drain faster. Anyone else have these issues?
If this has been talked about already sorry, I didn't find anything in a search.
Click to expand...
Click to collapse
I would say root it and flash the previous modem that worked better for you.
D

You don't have to root to flash modems. He can flash whichever modem he wants via Odin. First he should find out if Sprint is doing Network Vision updates in his areas that could be the reason for bad signal and battery drain.
Sent from the future via Xparent Green Tapatalk 2

I agree with Ed, I've mostly seen these type of slowdowns when Sprint is updating the towers in your area. I'd recommend calling them to see if there are any updates in your area. Even if it's not the closest tower that's being upgraded, your tower might be overloaded picking up the extra calls.
The good news is that a few weeks after I had these slowdowns, I was getting pretty good 4G speeds.
And if you're getting a poor signal because of the network upgrades, it would make sense that your battery life would suffer, since it's having to try more often to maintain a solid connection.
Sent from my SPH-L710 using xda app-developers app

[Q]4G data speed very slow during call

Hi, I have a galaxy S3 with T-mobile. I'm in a place where I have excellent 4G speeds (about 5-6 Mbps :speedtest), I noticed that when I'm on a call the 4G data speed drops to useless speeds. I can barely open a website or download an app. Speedtest shows like 500+ ping and about 500kbps download which is NOT constant (goes up, stops, goes down, etc). Real speed is way less than that. Websites don't open or take forever.. Is this normal? I am using stock rom (but also happened with other roms). I went back to stock thinking that this was a problem with other roms only, but the same thing happen with stock rom. Any ideas/clues/solutions? thanks in advance

Long ping times is normal due to how it operates. But only 5-6mbps? That's pretty slow. Most get averages of 13-18mbps and some get averages around 25.
Try the different modems to see which will be better for your location.
Sent from my SGH-T999 using xda premium

DocHoliday77 said:
Long ping times is normal due to how it operates. But only 5-6mbps? That's pretty slow. Most get averages of 13-18mbps and some get averages around 25.
Try the different modems to see which will be better for your location.
Sent from my SGH-T999 using xda premium
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Click to collapse
So, its kind of normal to get slower speed while on a call?

It would seem a logical conclusion. But I've never tested it. But I've never had anything not load or go slow enough for me to notice. If I think about it on my next call ill try to test it out.
Sent from my SGH-T999 using xda premium

DocHoliday77 said:
It would seem a logical conclusion. But I've never tested it. But I've never had anything not load or go slow enough for me to notice. If I think about it on my next call ill try to test it out.
Sent from my SGH-T999 using xda premium
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Ok thanks, The problem here is that I find it way to slow.. lets say I'm downloading a file with no phone call going and I get 600KB/s, during I call I get like 16 to 40KB/s at most... It's like having dial up again... way to slow.. I think something is not right but can't figure out what, since I reverted back to stock wiped everything and also formatted the system after installing stock..

Have you checked your imei or ever lost it?
If not you should really try the different modems.
If this is a recent development you should also call support to see if they have any tower issues in your area.
Sent from my SGH-T999 using xda premium

DocHoliday77 said:
Have you checked your imei or ever lost it?
If not you should really try the different modems.
If this is a recent development you should also call support to see if they have any tower issues in your area.
Sent from my SGH-T999 using xda premium
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Click to collapse
IMEI still intact, and have never lost it. I will try with different modems thank you! I'm not sure if this is a new issue since I didn't use my internet as I am using it now while on a call before, also I moved from Puerto Rico to the states for a few months, so there are many variables at the same time. But will try with the modems.
Another question, when I odin Stock (not rooted) ROM does everything (incl. modem, kernel, etc) goes back to stock?

fireboypr said:
IMEI still intact, and have never lost it. I will try with different modems thank you! I'm not sure if this is a new issue since I didn't use my internet as I am using it now while on a call before, also I moved from Puerto Rico to the states for a few months, so there are many variables at the same time. But will try with the modems.
Another question, when I odin Stock (not rooted) ROM does everything (incl. modem, kernel, etc) goes back to stock?
Click to expand...
Click to collapse
Good luck.with the modems! It takes patience, but is worth it in the end!
Yes, Odin flashing the official firmware will set everything back on stock.
Sent from my SGH-T999 using xda premium

Hello, spent the whole day testing out every single JB modem from your post and none of them solved my problem... did find better speeds with some on them while not on a call. But as soon as I'm on a call the speed drops to about 47kbps, looks like a cap or something because I get constant speed of 47-49 kbps. Sometimes it goes over the cap and works normally but for a few seconds then the speed drops and its not constant anymore until it reaches around 47kbps... This is so frustrating... is there anything else that I can try out??
Sent from my SGH-T999 using xda app-developers app

fireboypr said:
Hello, spent the whole day testing out every single JB modem from your post and none of them solved my problem... did find better speeds with some on them while not on a call. But as soon as I'm on a call the speed drops to about 47kbps, looks like a cap or something because I get constant speed of 47-49 kbps. Sometimes it goes over the cap and works normally but for a few seconds then the speed drops and its not constant anymore until it reaches around 47kbps... This is so frustrating... is there anything else that I can try out??
Sent from my SGH-T999 using xda app-developers app
Click to expand...
Click to collapse
Flash the LJC firmware package. Third firmware link in my signature. This is for SGH-T999 (d2tmo) only. Unsure about the download cap while talking on the phone. Aren't the two separate? Cell and data, right? Shouldn't be a cap then, but I've never been talking on the phone while downloading a file. I will try it if I think about it tomorrow.
5-6Mbps is not bad. It just depends so much on where you are. My fastest test ever was the other day @ 14.4Mbps. It's not a big city, but it's sizable. It's usually under 10Mbps in that location. And normally less than that everywhere else in the area. There are some areas that put me on Edge. Might as well just turn on airplane mode. Because T-Mobile's Edge... is actually worse than no data connection at all.

Thank you, will try that tomorrow. 5-6mbps is fine for me but that is without call. While on call is like 0.37mbps constant or really bad ups and downs.. is like edge (worst than not having connection at all).. anyways will try and report back. Thanks again
Sent from my SGH-T999 using xda app-developers app

Sorry I couldn't remember this before, but I have a theory that could explain what's going on there.
Voice calls and 2g (GPRS) both share the same frequency spectrum. I remember doing some 3g research in the past and one of the benefits to the introduction of 3g was more overall bandwidth for all, even those left on 2g. At the time, 2g data service was greatly impacted by how much voice traffic was going across the network at any given time.
During peak voice call times, there was less bandwidth for mobile data users because the tech was designed to give priority to the calls. This meant even slower than usual 2g data speeds.
But as people moved to 3g, there were less using 2g for data lessening the impact caused by voice and sms communications.
So what I'm getting at is when you are on a call, that call is going across 2g frequencies, meaning you are connected to 2g. (Though 4g data should still be available to you regardless. But it may have something to do with what you're experiencing.)
Keep in mind that this was 3 or 4 years ago. I'd think that it'd work differently now. But it is possible that they never changed the fact that voice shares its spectrum with 2g. I could be seriously off with all of this, but I still thought I'd mention it since it would make a little sense with the speeds you're seeing.
The thing is, the S3.is capable of using DC-HSPA (dual carrier) which means it can use 2 different signals at once (one from T-Mobile, one from a partner carrier) for greater speeds (HSPA+42). So I don't understand why it won't use this same tech to give you better data speeds while on a call.
I know I've used mobile data while on the phone before, and never felt like the qos was lacking. But I never speed tested it either.
The more I think about it though, the more I'm thinking it's either firmware (see aerowinders post above), hardware, or you're connecting to a tower that either has problems or hasn't been upgraded in a long time. I don't believe that what you're seeing is normal operation.
Of course every bit of this is speculation at this point. Hope no one thinks I wasted their time with it. I thought it may spark some ideas though!
Sent from my SGH-T999 using xda premium

I was looking up some information and ran across this. Figured Id link you to it since it is directly related to your problem.
You can pretty much ignore my above post! LOL
T-Mobile Support Document - Using Voice and Data Services at the Same Time
Basically, it looks like you should call Tmobile.

Tried with the file you provided and still the same results.. I guess I will have to call tmobile to troubleshoot this problem :/ thanks tho
Sent from my SGH-T999 using xda app-developers app

Good luck! Let us know your results if you don't mind.
Sent from my SGH-T999 using xda premium

Hello, I still have not called customer service, but I'm going to be back where I din't have any problems next week. I'm going to test it out there. If I don't have problems there, then it's this area the one with problems. Anyways I will let you all know my findings.. Thank you all for the support!
Edit: I just confirmed that it works perfectly fine where it used to worked fine. It must be the new area where I moved recently that has issues. Thank you all for your time and help.