I'm having a problem. I have a GT-I9000M device that shipped with the latest Eclair ROM (JH2) for that model. Worked fine of course.
A few days after rooting it I flashed JPK and then applied Doc's Mod. It changed the boot screen and product name in About Phone to GT-I9000 instead of GT-I9000M. I wasn't too worried, though, because I was sure that with the speeds and reception I was getting, that I was getting all the bands I was suppossed to.
Then I decided to flash JM8. I followed the instructions to do so, then applied Doc's Mod. The ROM was great but I was getting almost no reception (either 1 bar of "G" or zero bars "H" in most situations). Super slow/poor data and phone performance.
Then I decided to go back to the stock JH2 that the phone came with to get my speeds back. I flashed (using 512Pit) the PDA, Modem, and CSC for the device. Booted up and ran great, and both boot screen and About Phone have changed back to GT-I9000M. But while I'm getting some "H" reception, reception over all has been quite poor and not what I got originally with the device (or so it seems).
How can I check to see what bands I'm actively getting and which I'm not? What steps should I take to resolve this? Thanks in advance!
Grab the SGS Tools from the market. It has some secret codes that will answer your question.
After testing, my Galaxy S is definietly only getting minimal 1900 3G coverage everywhere despite my other phones pulling down very strong 850. So something is definitely wrong it sems, how would I go about fixing it?
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chambo622 said:
After testing, my Galaxy S is definietly only getting minimal 1900 3G coverage everywhere despite my other phones pulling down very strong 850. So something is definitely wrong it sems, how would I go about fixing it?
Sent from my GT-I9000M using XDA App
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Follow my instructions here.
you need to install BMC product code, right now i bet your product code is KOR, i was having same problem only getting 1900 band, after flash back to JH2 change my product/sale code to BMC, then wcdma 850 will work again
Once I flashed back to UGJG8 I was able to change the product code which fixed it right away (that didn't work from JH2). After fixing, I flashed back JH2 again and it continued to work fine. I then flashed JPK and it continued to work fine. Although if I want to downgrade from JPK, I now know that I need to go to UGJG8 first. Thanks for all the help!
Related
Repost from thread: http://forum.xda-developers.com/show...=771578&page=3
Hey Guys,
I have a GT-i9000 (Unlocked) and after a few firmware upgrades I have been noticing worse call receptions (more drops) and worse 3G data performance.
For example, I once had near perfect reception and few call drops along my drive home, now (5 firmwares later) I have been dropping calls like my old iPhone (actually worse) and what is more upsetting, yesterday my friends with their iPhones all had signal while I was getting the no service icon.
While i know the Captivate users can use the i9000 kernels (but swapping out the modem file) I wonder if anyone knows if I can use their Captivate modem file (JG8) instead of the one that comes with JM7 to fix my issues with reception and 3g performance .
What functionality will i lose? I travel to Germany often, will that cause issues with 1900Mhz and 2100Mhz bands ?
Is there any other reason that my signal would be so poor?? I really need help with this.....
Is anyone else using an unlocked i9000 on AT&T and having poor voice calls (signal/drops)?
What firmware are you using now? I would like to see if this relates to my issue.
I'm using JPC on my Bell i9000m and am starting to wonder if the reception is not as good as with JH2... I am contemplating using the JH2 modem file with JPC to see if it helps...
Coincidentally, I'll be in the US in a few weeks so I want to ensure I have good reception on AT&T as well.
i am using JM6
Just tried the modem from the the Captivate JG8, it would not even install.
So I am running JM7 now.
I will see how many dropped calls i get today.
JPC stopped booting for me and I am on JM7 as well - I'll post my comparative results as well tomorrow.
kurtkbee said:
Just tried the modem from the the Captivate JG8, it would not even install.
So I am running JM7 now.
I will see how many dropped calls i get today.
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Click to collapse
Just did some tests with my wife's iPhone (3gs) and my galaxy s.
Passing the same dead zone and her phone could make calls and mine would fail.
I wonder if i put it on gsm mode only if that would help.
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Um, hi.
Last night I purchased a new Galaxy S Vibrant from Bell. Of course the first thing I did was jump over here to XDA to do some required reading. I proceeded to unlock, root, and flash froyo. All was working fine, until I found an App on the ROM to do a factory reset. There was still a lot of bloatware on the phone so I figured that would be a good idea. After that, I've begun experiencing low signal issues in certain places. The phone can still connect to the Rogers Network, and I have the correct APN settings (I get 3G), but in many areas my phone loses signal. Before the data wipe I could make calls just fine out of my basement but now I don't get signal down there. Is there any way to fix it? I know this sounds pretty vague, however if you need any more information I'll be happy to provide it.
Cheers!
(By the way, I love this phone!)
A lot of people have complained about losing the 850mhz frequency when upgrading to froyo on the bell sgs, so if you can't get 3g then you just lose reception all together, there is a fix for it, I believe its in the android development section, search in there, I saw it in there yesterday, search 850mhz lost signal and it will come up for sure, there's a fix for it
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Ah Alright. I've been reading around these forums a bit and I came across a few of those threads. I wasn't sure if that was my problem though, I'm still pretty new to the phone. Thanks for the help!
No problem, glad to help
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From what I am reading, it doesn't look like there's a froyo fix :/
Does that mean I should downgrade back to eclair, at least until Bell releases official froyo? If that's true it's unfortunate
did you read the 850 sticky topic?
just go into the service menu
and play with the band selection options
that should get your 850 back
Hi.
I have two I9000Ms, flashed JPJPG and tested them working ok in Canada. Went to visit in the middle east. Then I encountered an issue: One of the SGSs has amazing/full reception, the other one has completely no or extremely little reception. I'm using exact same sims. I even tried switching sims but still yield same result. I'm thinking i should install the proper modem or re-install the JPJPG modem by itself.
I would highly appreciate some advice. I can't seem to find any info since this maybe a specific issue.
Anyone? I can safely say that im desperate for some direction.
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get sgs info or sgs tools and look at settings my guess is that on eof them has 2100 mhz or something disabled whle the other doesnt.
Hi,
I just came back up from the states for vacation and I was using my galaxy s roaming. It was working perfectly fine down there but when I came back up to Canada, my phone couldn't connect to Bell. It sees rogers and I connect to it for "SOS calling only" but it can't find the Bell networks. Any help?
Thanks
What modem are you running? Also did something happen to your APN settings?
Swyped from a galaxy far far away.
I'm using JL2 and am on MIUI. My APN settings are still there. The exact same as before.
You must be on a different modem than jl2 because it has roaming issues in the states, that's why they released KC1.
Swyped from a galaxy far far away.
Well, when i was in the states, i was on kc1 but when i came back up, i noticed that i couldn't connect to Bell. I thought that flashing to JC2 may help but it didn't.
In perkas file stash app there are 850 enabled modems and there is a kc1 modem there you could try. It Is cwm flashable also.
Swyped from a galaxy far far away.
I'm pretty sure its not the modem. I've already flashed multiple that are confirmed to work on Bell and have the 850 frequency.
I did have a problem one or two times after flashing a new rom and then our modem and it didn't work right away, but eventually it worked fine. Maybe if you give it some time it may work. Are you in a 1900 band area or 850 only?
Swyped from a galaxy far far away.
I live in a pretty big city so I would guess that I would have both frequencies. The phones been in this state for a good 24 hours now so I don't think waitings going to help. Do you think it may have something to do with the SIM?
It is possible that there is a problem with the sim. They aren't indestructible. You could try someone else's sim.
Swyped from a galaxy far far away.
My phone is SUBSANTIALLY slower than my wifes Sensation, some of which I understand is because I am using a phone not designed for T-Mo's network, but what is the optimal setup for this phone to run on T-Mo's network
thanks
For me running the t-mobile T879 stock rom and radio on the I717 seemed to work best. I noticed better data speeds but I only ran it for couple of days before I sold the I717 and got my T879. Just follow the instructions in tomin.fhl's thread in the dev section.
I'm also getting horrendous speeds, using stock rom and radio for the i717. Also tried blaze and got about 10kb's more in downspeed. my average speed is about 80Kb/s
:-\
N1vek215 said:
I'm also getting horrendous speeds, using stock rom and radio for the i717. Also tried blaze and got about 10kb's more in downspeed. my average speed is about 80Kb/s
:-\
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I'm running an i717 on Tmobile also. Was able to fix my speeds using this-
http://forum.xda-developers.com/showthread.php?t=1931679
1. Must be on a tw rom
2. Go to service mode by using *#2263#
3. Go to wcdma per. and click on wcdma 850
4. Signal bar will be replaced with a circle with a line thru it.
5. While about 5-10 seconds. Your signal bars will return but you will have no 4g.
6. Hit settings button, go back and click on wcdma all and 4g will come back.
7. Do a speed test and profit.
8. Every time you reboot you must do this every time. Only takes about 30 seconds
Currently running objection UCLE2. Works on the Black Star Rom also.
holy cow, thanks
I get WORSE service using this. I tried flashing other modems as well, but then my sim stop working. I'm beginning to think some i717s just don't work as well as others.
Hi I hope you can help me out or know someone who can. I have a i717 note unlocked and rooted using straight talk service with a tmobile compatable sim card.Before root I was running 4.0.4 now im on 2.3.6 but my basband say UCLF6 my talk service is great it shows a data signal (g) or (e) edge but it wont let me connect says data error. I need a detailed guide step by step (pictures) of the tutoral if possible. I managed to root my device but there are still alot I need to learn. XDA ROCKS!
THANKS. Hope you have the time to help me out.
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