yashsingh1/xdaforums huggingface dataset:
[Captivate Q&A, Help & Troubleshooting] keener31:
@setk: got it. thanks for the info. if I can't get this to stabilize with software then ill try the same. (and hopefully be able to sell it and fund a nexus s if they release for other 3/4G radios.

@derek: will do the same then.

(samsung sghi897 on perception b.8)
[Captivate Q&A, Help & Troubleshooting] Yuna:
Me only getting NO Service mode is when i move in my work - i have a bad 3G reception there, and i use only WCDMA, not GSM.

When i go back to street - boom, no service.

If i try to go into airplane - frozen airplane, only reboot after which i am in airplane...
[Captivate Q&A, Help & Troubleshooting] keener31:
still occurring here.

ive set the phone to GSM only (so it is stuck on edge) to see if that will be more stable.

still hoping for a clean modem or solution.
[Captivate Q&A, Help & Troubleshooting] derek_h77:
seems like i'm getting closer to a solution. running jk3 with xcal's kernel and haven't had any issues in over 7hours. we'll see what happens when i charge the phone overnight :D

EDIT: You guys might also check out this thread

http://xdaforums.com/showthread.php?t=870760

If my current set-up doesn't work. I'm going to flash cog2.3b6 with the voodoo stable kernel--that's gotta work!
[Captivate Q&A, Help & Troubleshooting] newter55:
Try the tljl3 modem....i had issues with jk3/4 service drops even while not moving or randomly picking up the phone to see no bars where I normally have excellent service on numerous roms and since flashing this modem they are finally gone...thank god. I was about to go back to jpm with the jg8 trickery
[Captivate Q&A, Help & Troubleshooting] derek_h77:
thanks for that. i'm running clean so far with jk3 and xcal's kernel but i keep hearing good things about jl3 i might flash it tomorrow anyway :)
[Captivate Q&A, Help & Troubleshooting] keener31:
will take a look at that lj3, thanks.

I also read the voodoo thread that supercurio started. also considering doing cog2.3b6 (since its a captivate based rom) and flashing in SC's kernel.

will keep bumping with my results, of course.

(samsung sghi897 on perception b.8)
[Captivate Q&A, Help & Troubleshooting] keener31:
ran in GSM only mode for a while. still dropped eventually.

trying wcdma only now.

(samsung sghi897 on perception b.8)
[Captivate Q&A, Help & Troubleshooting] keener31:
wcdma only worked for longer, but still failed.

i think im gonna go cog2.3b6 tonight.

@derek: did you update the modem after flashing over or just flash the voodoo kernel?

edit: also, is there a working link for cog 2.3b6? i checked out DG's old rom repository but it does not appear to be listed there (unless it is improperly named).
[Captivate Q&A, Help & Troubleshooting] derek_h77:
i dropped voodoo into the cog zip file and have been running fine. i'll try to put a link up when i get some time. i am going to flash the jl3 modem just for kicks sometime.
[Captivate Q&A, Help & Troubleshooting] arieru:
I had the same problem...

I had the same problem, with an i9000T, from Argentina. I flashed

a lot of roms, without finding a solution. But then, I did the most

stupid thing ever... I just did a factory reset of the phone, but

from inside android (not in recovery mode).

Settings -> Privacy -> Factory Reset (or something like that),

with Froyo XXJPU, and all was normal again...

Maybe some one of you, can probe it, to confirm ? Go back, to a

previous rom, that worked ok for you, and do a factory reset, from

inside android settings. Hope you have the same fortune I had.

Regards.

Ariel.
[Captivate Q&A, Help & Troubleshooting] derek_h77:
The internal factory reset didn't fix the problem for me. Dangit...
[Captivate Q&A, Help & Troubleshooting] BLWedge09:
I know this thread has sort of died down, but I'd love for someone to find a solution. My experiences are as follows.

#1: If I run a full i9000 ROM with an i9000 kernel and i9000 modem (jk3,jk4 jl3, etc.), I will randomly lose all cell service. Sometimes it will happen in 20 minutes, sometimes it will take 12 hours. I live in a spot that gets just slightly better WCDMA 1900 coverage than 850...but it sometimes switches to 850. Like others, i feel like the switching is the issue.

#2: Running a full Captivate based rom like Cognition 2.3b8 which includes the Captivate kernel and the JI6 modem (also Captivate), everything is fine.

#3: This is where I get confused. If I take a Captivate based ROM/Framework and flash a i9000 kernel (CogKernel4 for example) and a i9000 modem (jk4 for example), everything again works perfectly. I have run this configuration (Cognition 2.3b8/CogKernel4/JK4) for days with no issues at all. This leads me to believe that the problem lies somewhere in the differences between i9000 and Captivate frameworks.

By the way, even though the jl3 modem seems to get the strongest signal when working, it also causes this problem the most for me.
[Captivate Q&A, Help & Troubleshooting] derek_h77:
Thanks for helping keep this thread alive. I think most people that have this issue are just resigned to no solution being found and just run cog. Maybe we can put in a request in the dev forum? I'd pay to have this problem fixed since nearly all the speediest roms are the i9000's. How do you compare the performance of the cog rom with the i9000 kernel's versus straight i9000? Running Darky's 7.0 rom as is and right now I'm in a tiny town where I barely get service but I haven't had to reboot in several days....
[Captivate Q&A, Help & Troubleshooting] ijoosong:
It seems strange doesn't it? Why wouldn't the dev's have fixed something this big by now?

I just recently ran into this problem. I actually had a problem with this even before I flashed it or rooted it. So I called AT&T and they told me they would replace my phone but then all of a sudden it started working no problem again. So I'm wondering if it has to do with the actual phone or is everyone else using i9000 okay? Is it just us?
[Captivate Q&A, Help & Troubleshooting] derek_h77:
I'm guessing the devs haven't fixed this because the problem isn't wide spread--might be hardware related. Seems our options right now are to run captivate rom/kernel/modem and have no issues or run a captivate rom, i9000 kernel/modem and have some problems. Running cog with setirons kernel and jk3 I have to reboot usually once or twice after charging then I'm good until I charge again. Still not perfect feels quicker than the pure captivate set-up.
[Captivate Q&A, Help & Troubleshooting] razorguy:
I have been experiencing this also, however I found a VERY simple fix for mine, so it isn't bugging me anymore (was having to reboot). My phone was dropping service like mentioned, sometimes in 20 minutes, sometimes in a few hours so I kept rebooting to fix it. Well then I noticed my phone wasn't losing connection, it was going into Flight Mode, thus killing my service. A simple uncheck of the Flight Mode box brought back all my bars instantly. Note: I didn't read through all 6 pages so I'm not sure if this has been mentioned before or determined this isn't what's happening to everyone else so sorry in advance if it's a repost. Hope it helps someone and maybe the ROM devs can figure out the issue.
[Captivate Q&A, Help & Troubleshooting] BLWedge09:
I ran for weeks on Cog 2.3b8 with CogKernel4 (one of designgear's oc/uv kernels) ans the jk4 modem with no problems. Then, on the weekend, one morning I got up (phone was fine...i checked) and about an hour later, I lost all signal. A reboot brought it back...but it's so weird that this happened after a couple weeks but no time in between. I've been running straight Cog 2.3b8 for a while now, but I just can't resist trying something else. We'll see how it goes. I know I can't use the jl3 modem that everyone else loves. It'll lose service sometimes within 30 minutes of flashing it. I may flash the glitterballs kernel and the jk4 modem back on Cog again and give it a try.....or might do the same with Perception. I don't know at this point if it is the Cptivate ROM/Framework keeping the modem mostly in check or if the jk4 modem is just the luckiest one for me.
[Captivate Q&A, Help & Troubleshooting] derek_h77:
I think you're on to something by using a captivate rom as the base--its pretty stable. I can run an i9000 kernel/modem and only have to reboot once or twice after charging. I bet if you run Perception you'll run into more frequent no service problems since its an i9000 rom. But heck, if you find something stable pass the word.
[Captivate Q&A, Help & Troubleshooting] bobbylx:
Well if we could get some Devs or people smarter than I to check this out that would be great. I am running Perception 10 now and upon installing I installed a log reader.

Ran about an hour then dropped service. I picked it up about every 5 minutes just to check service, and give myself a time frame for the log reader.

During the time it lost service, I found an error that repeated a couple times. This was the only occurance of this error in my logs, so I'm betting this has something to do with it.

Here it is,

E/IccCard ( 3258): Error in get SIM LOCK INFOcom.android.internal.telephony.CommandException: GENERIC_FAILURE

Error in get SIM LOCK INFOcom.android.internal.telephony.CommandException: GENERIC_FAILURE

It repeated a couple times, and then from there on out no service, other than my wifi. I'll attach the full log in case someone wants to read it.

Hope this helps someone, guess I'll be researching a bit tonight.
[Captivate Q&A, Help & Troubleshooting] derek_h77:
great job bobby! if you haven't already, i would pm DG or another dev with the log. probably the most useful information for them to help troubleshoot. heck, if that is a common error across our phones then i'd be willing to offer a bounty to get the stupid thing fixed.
[Captivate Q&A, Help & Troubleshooting] bobbylx:
Just sent DG a PM with the same info and link to this thread. Hopefully he has a few moments to check it out. If I hear anything I'll relay it along. Until then going to experiment with a Perception/Cog hybrid. What the heck, got nothing else to do.
[Captivate Q&A, Help & Troubleshooting] bobbylx:
I've got a question for those of you with this problem also.

How old or new is the SIM card you're using? I'm curious if that has any effect of this. My SIM card is about 4 years old now. I'm not sure if that would make any real difference but thought I would check.
[Captivate Q&A, Help & Troubleshooting] derek_h77:
I think mine is pretty old too. I can't remember if mine got replaced when I upgraded a year and a half ago. If I didn't then my sim is closer to three years old.

I've noticed that after the initial flash of a i9000 rom that I'm usually OK until I charge the phone then the service drops begin to happen randomly--have you noticed this?
[Captivate Q&A, Help & Troubleshooting] evanstapler:
I'm also getting this problem on Darky's ROM (8.0, XXJPY based). I read through the thread, and I didn't see a solution (right?). Right now my phone is sitting at 4 bars, but nothing indicating which band it's in (3G, H, nothing). I don't get any service like this. My SIM card is new as of late October (when I got my captivate). Is there any other information I can provide that may help us out?
[Captivate Q&A, Help & Troubleshooting] -=HOLLYW00D=-:
i experience something similar. i have "no service" every time i flash a new rom. i sometimes get it fixed by toggling the flight mode to ON then rebooting (repeat until service comes back) or doing the internal "factory reset". my sim card is new (with phone purchase) as of late august/early september.
[Captivate Q&A, Help & Troubleshooting] bobbylx:
Hmm.. I'll try again this weekend but I think I noticed the same. I got my hopes up a week or so ago because I flash Phoenix or Axura and did not charge the phone right away. I left the house and it worked for probably 6 hours before losing signal. This past weekend I flashed about 10 times, and each time I just left my phone plugged into the USB and computer. I usually lost signal within 10 minutes or so.

I'm more than willing to flash pretty much anything to phone if any of the Devs have any suggestions.

At this point I just went back to Cog because I'm tired of messing with it.
[Captivate Q&A, Help & Troubleshooting] alaimar:
I flashed cezar's ROM v6 and I'm yet to have the signal issues. I've been running it for the 3rd day and man its a good rom. Ive flashed almost every Rom on XDA and this is hands down my favorite one overall. Awesome battery/GPS/speed.
[Captivate Q&A, Help & Troubleshooting] Jmurph3:
I'm sure you know this by now maybe, but DG has relased a 0.6 update fix for Perception build 10. He thinks it might have fixed the SIM problem but I'm still dropping signal randomly like you are. I guess I'm missing something as well, but how do you pull a log like you have?
[Captivate Q&A, Help & Troubleshooting] derek_h77:
With terminal emulator on my phone, I ran command logcat. Might be other ways...
[Captivate Q&A, Help & Troubleshooting] bobbylx:
There's a free app in the market, I think it was Log Toaster or something. It pulls your logcat too.
[Captivate Q&A, Help & Troubleshooting] janepen:
I am originally in UK ORANGE firmware. I flashed it to JPO using Odin and then start to had bad service/no service issues. I spent two months to solve this problem (flashed more than ten roms) but not succeed. Yesterday I try to flash it to new uk orange firmware, but the phone stucked at the logo image (no recovery mode but has download mode). I have to flash it back to JPY.

My phone only works well in the city centre, others have bad signal or no service.

Please help me.
[Captivate Q&A, Help & Troubleshooting] bobbylx:
Well I am in an ongoing experiment right now. Yesterday afternoon I decided to try this,

Flashed to stock JF6. Then tried to update via Kies and OTA, neither worked so I grabbed teh JH7 CWM file from Dev section. Flashed JH7. Then I flashed Phoenix rising 2.5.

I did this because I was wondering if JH7 had some kind of fix that I never got because I always flashed back to JF6. I also did a master clear for the heck of it.

After flashing Phoenix I have NOT charged my phone or even attached in via USB. It's been running Phoenix for about 13 hours now with NO drops or signal loss. Here is a bit I am going to charge it and see if that causes any signal loss.

I'll keep updating with info.
[Captivate Q&A, Help & Troubleshooting] newter55:
@bobbylx,

Please do let us know what happens either way and weird stuff sometimes works. We all know about the voodoo magic with jg8 modem and 850 band.
[Captivate Q&A, Help & Troubleshooting] bobbylx:
Interesting. Let my battery get down to 27%. plugged it into the charger and it kept service until it got to 90% charged.

So i unplugged and rebooted. Have service again and going let battery go down a bit and see what happens.

So, had service for about 15hrs straight. Charging above 90% seemed to kill it.
[Captivate Q&A, Help & Troubleshooting] derek_h77:
Glad your still fighting bobbylx. You gave me an idea. I've ran a few logs after fully charging the phone but now I'll start a log once the phone is close to charged.
[Captivate Q&A, Help & Troubleshooting] bobbylx:
Hmm...this is interesting so far. Just over an hour and a half ago is when I made the above post. I removed from charger and rebooted. I immediately used the phone until the battery level went to 89%. Then I have been using it like normal. Since then I have not lost service again.

Not sure if it's coincidence or what?
[Captivate Q&A, Help & Troubleshooting] newter55:
Go bobby go!!! You will be our hero though I am having better luck with the jpy roms, I still have signal loss occasionally.
[Captivate Q&A, Help & Troubleshooting] bobbylx:
Well, I'm hoping to at least the reason why it's happening. I'm pretty sure I don't posses the the knowledge to actually fix it, maybe someone else can. I like Cognition and all, but damn these other i9000/vibrant based ROM's are super fast and I want to run one!!

Thank being said, it lost service again. About an hour after my last signal drop. Instead of rebooting I pulled a logcat and tried restarting a few processes to see if I could find which was hung or dead or whatever. Eventually I put it in Airplane mode, which took it about 2 minutes, then took it out of Airplane and my service came back. Still going now, which is better than it's done for me in the past. By the way, from the logcat I was able to find where the service quit because GoogleTalk started showing error about no connection. It seems like this is the message that showed when it lost signal. If anyone knows these systems or logcat or whatever take a look, I'll attach the full logcat.

Log message,

I/DBG_WSS_DM( 3288): [wssTelephonyData.java Line:153] getInstance PHONE_TYPE_GSM

The first time I see that message in the log is just before GoogleTalk started showing no connection errors. This message seems to repeat every 5 or 10 minutes, not sure since the logs aren't timed. This goes until the service starts again, after I did the airplane mode change.

Forget that message, it's showing now while I have full service. Man I wish a Dev would take a look at this.
[Captivate Q&A, Help & Troubleshooting] newter55:
Try renaming talk to .bak so it does not run and see what happens or freeze it with titanium backup.
[Captivate Q&A, Help & Troubleshooting] bobbylx:
Who, me? Which app? If you mean google talk I don't really think it's the bad guy, it was just showing error because it did a status check and was offline or something. I guess it could be it, maybe I can log out and see what happens.

Also just bought fastboot pro, next time service drops I'll just tap the fastboot widget and restart all processes.
[Captivate Q&A, Help & Troubleshooting] newter55:
Ok, I just breezed through your post above and thought that maybe talk was a possible source but after reading I see that the problem is occurring and then talk can't connect. Never know though.
[Captivate Q&A, Help & Troubleshooting] bobbylx:
Well, at this point I really don't know what to think of it. It hasn't lost service again today. So in almost 24 hours I've only dropped service twice. I've had it on the charger for about the last hour, no change, driving around no change. Who knows. I'll just keep watching and see what happens.
[Captivate Q&A, Help & Troubleshooting] zelendel:
Hmm sounds like when you switch between H and 3G that the antenna is taking a while to reconnect to the new band. I know this is a real dumb thing but has any one tried to use the phone while there are no bars? Maybe that there is an issue with the way the signal is displayed sense most i9000 roms use a 4 bar system and the US Captivate uses a 5 bar system. To tell the truth I have never had this issue so am just shooting out ideas
[Captivate Q&A, Help & Troubleshooting] BLWedge09:
Which modem are you using when you're collecting all this info? Like I said before, jl3 is the worst for me. It will actually show the strongest service initially, but within 30 minutes it will lose service. Mine is also definitely not tied to charging at all. It'll do it at any battery percentage, on or off the charger/usb connection to pc. As I mentioned before, jk4 will hold the signal for quite some time before dropping. I went a week and a half to two weeks once on it before it happened.

I still believe that it is directly related to switching between 850 and 1900 bands. Like I said, at my house, each band is very close in signal strength. When on an i9000 modem, I can go into the screen that shows the band currently being used, and it will switch back and forth every few minutes.

Are our phone build numbers the same? Just curious on that one. Mine is a 1007.
[Captivate Q&A, Help & Troubleshooting] bobbylx:
Yep, mine is a 1007 also. Since about 6:30 last night I've been using phoenix and whichever modem is part of it, JL4 maybe?

I haven't lost service again today and tomorrow I'll be flying from the middle of nowhere to more of a city, so if it is band switching signal related maybe I can figure that out.

I did however make a tweak which I figured couldn't hurt. In the *#*#4636#*#* menu, phone information, I changed preferred network type to "GSM auto prl". I was trying to research those settings and read that setting keeps the phone from try to signal hop between bands as much. We'll see.
[Captivate Q&A, Help & Troubleshooting] newter55:
Mine are 1006 and I too live where 850 &1900 are prevalent though I can say that it does it even while stationary with a strong signal. Don't know if its relevant but I also am in edge much of the time.

I usually just wait and the signal will eventually come back, it almost is like the cell connection"sleeps". I don't get a complete loss no signal, rather I show empty bars and little or no data. Calling during this time will get through and ring the phone. Not sure yet if my problem is the same as you all see but if we are going to revive this discussion I will post my test results as modem does have impact (jpd is decent, jl anything are the worst.) I will test out the older modems using the jg8 to enable 850 this week.
[Captivate Q&A, Help & Troubleshooting] derek_h77:
My problem seems directly tied to charging not tower jumping. If anyone else noticed the random service drops following a full charge (or near full), here's what I've been doing that has worked for several weeks. First, I'm running cog2.3b6 rom with setrion's 1.4.3 kernel, jk4 modem. Launch day phone also--1006 batch.

1. Charge the phone fully (power on or off doesn't make a difference for me).

2. After boot (or done charging) within about thirty minutes or so pop open the browser to check for service.

3. If not reboot immediately (it seems that the longer the phone is 'stuck' without service the more reboots are needed).

4. If you still have service, periodically check until service drops then reboot immediately.

5. That's it

Most of the time I only have to reboot once or twice following a full charge. Like I said though, if you are without service for awhile and have the 'not' symbol in place of 3g or whatever, you'll probably need to reboot a couple more times. Don't know why this procedure works for me, but it does every time. Hope this helps someone else cope until we find a true fix rather than a work around. One final note, my phone starts to misbehave around the 89% or 90% charge mark so if you are charging with the power on then you might need to start checking for service problems then instead of 100%.
[Captivate Q&A, Help & Troubleshooting] k2snowboards88:
I have the same problem. It strikes every time I charge for a long period of time. I have tried disabling all 3g bands but 850 but I still had the problem.

I bought this phone on launch day and also have the shutdown problem a couple of times a month. Att is replacing my phone with a brand new one tomorrow. I'll let you know if that changes things. Right now I have a hypothesis that our problem could be due to the network topology in our areas. Maybe I can prove or disprove that over the next few days.
[Captivate Q&A, Help & Troubleshooting] razorguy:
I installed the JK4 modem and have been having far less problems. I charge my phone every night when I sleep and now I have to reboot about 75% of mornings when I wake up (after taking it off of charge) and have yet to drop service during the course of my day (been using the JK4 for a little over a week now). Prior to this with the JLx modems, I had to reboot every morning and 3-5 times throughout the day so this has been a huge improvement.

I have been using this modem with Daryk's 7.7/8.0.1 ROM and xcal's reoriented v2.3.0 kernel.