Database Develop

[Q] Darky's Rom 8.0 - Issues with weak signal

I recently updated to Darky's Rom, 8.0, wipe edition, and although I really like how fast it is, and the battery life seems ok, I've noticed a strange issue.
I'm on Rogers in Canada, with a Bell Galaxy S Vibrant (i9000m) so it only gets UMTS band 1900.
While on the stock Samsung firmware, I'm often in an area where I get say 1-3 bars, but it seems to work fine.
On Darky's rom, it's constantly going from the 1-3 bars to no signal
In areas with good-excellent signal, it works flawlessly.
I'm guessing this is a bug with the modem he is using in this rom?
Any ideas anyone?

The modem he uses is the latest one XXJPY. Only thing I can suggest is try one of Doc's ROM's and choose the modem you had before you installed Darky's ROM and see if that affects performance. Some modems perform better for others purely because of their location (Normally Europe tbh mate). If you see better signal from a different modem on Doc's though and its a real problem to use Darky's, just make as much of a similar version or maybe one you actually prefer in his kitchen and install R64's theme ontop. Won't be much different tbh mate

Instead of flashing another rom why don't you just try flashing a new modem, in the JL2 thread found in the general section theres a JL2 modem file thats flashable with clockwork. Try just flashing the modem to see if it helps you out.
Sent from my GT-I9000 using XDA App

Magic Kitchen build your own rom choose the modem .
Couple of faqs on modems on the page .
http://romkitchen.org/sgs/
jje

Samdroid_G_S said:
Instead of flashing another rom why don't you just try flashing a new modem, in the JL2 thread found in the general section theres a JL2 modem file thats flashable with clockwork. Try just flashing the modem to see if it helps you out.
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
Thanks, I found it: http://forum.xda-developers.com/showpost.php?p=10188028&postcount=177
I may give that a whirl, at least to try it. It seems the general consensus is that the GPS does not work anywhere near as well with this as with the one Darky uses, but I definetly want to compare, so it's good. Thanks
JJEgan said:
Magic Kitchen build your own rom choose the modem .
Couple of faqs on modems on the page .
http://romkitchen.org/sgs/
jje
Click to expand...
Click to collapse
That's pretty neat, I hadn't seen that before

I'm running darky's 8.0 with a jl2 modem. Just find a modem that is flashable via cwm and flash that on top look in one of my recent posts, there is one in there. Then all you need to do is manually add your access point name after you flash the modem and you should be good.
Sent from my GT-I9000 using XDA App

JL2 Modem with 8.0
I'm running darky's 8.0 with a jl2 modem and the signal and GPS functions amazingly. I'm on Fido (Rogers Network) and highly recommend flashing the JL2 modem to fix your issue.

there you go!
Just flash with CWM

thanks guys, i'll give it a try.
btw I did some more investigation by going through the band selection.
Rogers, who I use, uses GSM (EDGE) on 850mhz and 1900mhz, and UMTS (3G) on 850mhz and 1900mhz
The i9000m supports GSM (EDGE) on 850mhz and 1900mhz, and UMTS (3G) on 1900mhz
Using Darky's rom, GSM 1900mhz and UMTS 1900mhz are working. GSM 850mhz is NOT working, hence when I'm in an area with poor 3g signal, it is dropping to EDGE, and since I'm not getting the 850mhz GSM band, I'm dependent on the 1900mhz GSM band, which is iffy in this area

So I installed the JL2 modem, and sure enough 850mhz is BACK!
Woot! Thanks people
I'll do some tests with the GPS later and see if that is still working correctly.

sw411 said:
So I installed the JL2 modem, and sure enough 850mhz is BACK!
Woot! Thanks people
I'll do some tests with the GPS later and see if that is still working correctly.
Click to expand...
Click to collapse
Great to hear! Enjoy this awesome ROM and if you haven't already, please consider donating as Darky has put a lot of work into the creation of the ROM.

no issues at all since switching back to JL2 modem, looks like this is a must for Rogers users.
Thanks again all.

Works for Latin America SGS
Thanks for the info. My phone works very well now.
Santa Cruz - Bolivia

Is there a way for me to verify the version of my modem? It looks like it's working better ever since I flashed JL2 modem, but I just would like to check...

Hello everyone!
Im from Malaysia. I flashed my GT-I9000 about with Darky ROM 10.2 final which is based on JVQ ROM (Gingerbread 2.3.4) about a week ago. Everything else is great except for the poor signal strength. I suspected this could be due to Europe Modem. Can I flash my phone with Asia modem? If yes, what the best asia's modem version to be used with DarkyROM JQV v10.2?
My phone:
GT-I9000
19000XXJVQ
2.6.35.7-I9000XXJVQ-CL281085 [email protected] #DarkCore_2.9.1_JVQ
DarkyROMJVQ v10.2

[Q] Baseband / Modem Versions

Okay, Long story here folks.
Firstly, I'll just let you know that I'm from Saskatoon, Sask. Canada. And my carrier is Sasktel.
About a month ago i decided to try using a custom Rom. I decided on, and successfully installed Darky's V10.0 RC5.
Initially I was thrilled! It was fast, stable, and improved my battery life by about double.
However, When I traveled outside of Saskatoon, I had no phone service. It was only when I passed through major cities that I has service. After some research, I discovered that Sasktel uses 850/1900 Mhz signal. The modem that was installed with Darky's ( I think it was JVK ) did not support 850 Mhz, but did support 1900Mhz which are set up in major cities, but not along highways.
Again, after some research, I found that the JL2 modem supports the 850 Mhz. I Kept Darky's installed, downloaded the modem file from samfirmware, flashed the JL2 modem through Odin, and enabled 850Mhz via *#*#197328640#*#*
The problem is that my battery life is terrible again. I only get about half a day out of it. This is a huge testament to how much the baseband version affects battery life.
So, my question is - How many modem/baseband versions are there available? And which of these support 850Mhz? Is it recommend to mix different build versions with baseband versions?
Can someone recommend a version that has excellent battery life and supports 850?
I've scoured the internet and haven't been able to find anything.
I'd appreciate your assistance.
Thanks,
Dax

I seem to be having the same sort of issue with Bell, all these custom roms / modems work awesome in the cities, but once your on the highway you have no coverage, very frustrating.
Currently looking for ways to access the 850 band with android 2.3, currently no luck, will post if i get results. :/

I believe kc1 is currently the best 850. however it is a froyo modem... it does work but its not.perfect. tubjv6 is supposed to support 850 but i havent seen it anywhere

pileot,
I've been able to get 850 working on Android 2.3. I found the answer on XDA. After you've flashed your custom rom, go to samfirmware and create an account. Then, find the i9000 firmwares for America/Australia and download the I9000UGJL2. Extract the modem file and flash it through Odin.
Then, you need to enable the 850Mhz band by following the instructions here: http://forum.xda-developers.com/showthread.php?t=1042113
The problem for me is that i've done this, and the battery useage is awful. I'm looking for a different 850 modem that has excellent battery life. Any input is appreciated.

astralmind, I found the TUBJ6V on Samfirmware.
I'm downloading now and will let you know the results.. Thanks.
Also, i just noticed that JL2 is for Android 2.2, and i'm running 2.3.
Everything works okay, but the battery drain is pretty bad. Could this be because i'm using a Froyo modem on Gingerbread?

Found a thread that might be helpful - it's got a big list of CWM flashable modems. Apparently, they support 850. No info on which work well, or which perform well.
http://forum.xda-developers.com/showpost.php?p=9874879&postcount=1

namzad said:
Found a thread that might be helpful - it's got a big list of CWM flashable modems. Apparently, they support 850. No info on which work well, or which perform well.
http://forum.xda-developers.com/showpost.php?p=9874879&postcount=1
Click to expand...
Click to collapse
just downloaded the cwm3_tljl3, the tijl3 is what I used on my Telus galaxy all the time and had good battery and excellent service on Darky's 2.2 roms. Just installed on the wife's Bell Galaxy, with Darky's 10.1 and seems to be working just need to test out the service and battery life. Going out of town in a couple of days and will report back with service and battery life.

try a different ROM

namzad said:
Found a thread that might be helpful - it's got a big list of CWM flashable modems. Apparently, they support 850. No info on which work well, or which perform well.
http://forum.xda-developers.com/showpost.php?p=9874879&postcount=1
Click to expand...
Click to collapse
do they work on galaxy S?
cuz it is posted in captive section

They work, I'm using an UGJL2 from that page, on a Galaxy S (i9000).
Just make sure you get the CWM3 version if you have Darky, and install it from CWM recovery using "install zip from card".
And pay attention that you take an i9000 version of course, because there are 3 batches of links there, i9000 2010, i9000 2011, and I897 2011.
I used the 2011 ones since I just got my phone two weeks ago.

turbare said:
They work, I'm using an UGJL2 from that page, on a Galaxy S (i9000).
Just make sure you get the CWM3 version if you have Darky, and install it from CWM recovery using "install zip from card".
And pay attention that you take an i9000 version of course, because there are 3 batches of links there, i9000 2010, i9000 2011, and I897 2011.
I used the 2011 ones since I just got my phone two weeks ago.
Click to expand...
Click to collapse
Thanks alot mate
Sent from my GT-I9000 using Tapatalk

KC1 is currently the best modem witch supports the 850 Mhz band

[Q] SGH-T849 Latin Rom

Hi, I have to take the chance to thank all the xda developers and forum users that have helped me with the hints and tutorials. I had never have to ask because all my questions where already answered in the forum but now I have a specific case where I have a SGH-T849 Tmobil tablet and need to install the latin P1000N rom. In case anyone wonder why it is because in the country I am the voice and 3g works perfect with this rom and with the current rom the max I've got is edge + voice.
So the question is .... Can I flash the P1000N stock rom in a SHG T849? If not and some one has the info I would like to know why.
Thanks again.

I used to have tmobile tab and i flashed p1000 roms from the samfirmware without any problems.
You will have to flash tmobile radio after you are done rom flashing.
if you want to be extra careful, dont flash the bootloaders.
Still dont blame me in case you brick it.

You can't flash a "N" rom unless that's your model. They are not compatible.
You won't get 3g on a t-mobile tab unless you're on a t-mobile network (1700/2100 bands). The rom can't change that.

thanks rangercaptain..... little bit late or better said too soon I have tried, I bricked it :-( no download mode no boot only lights the buttons...

[Q] Roms for SGH-I987

Hello All!
I am working with a SGH-I987 (ATT) for bluetooth related application development. Unfortunately 2.2 is being a bit of a bear to deal with. I was looking on the forum and found quit a few roms are available for gsm tabs. Could someone steer me to the roms that will support the SGH-I987?
I was looking at CyanogenMod9, but am not sure if my tabs will support it.
Thanks in advance!

If this is your first rom on a tab Id suggest starting with Overcome. A full guide is available too.
Enjoy!
Sent from my GT-P1000 using XDA App

some rom ready?
Hello,
I want to upgrade my att tab, yo ICS or GB (actually froyo).
You know where can i get a full guide and rom?
(i have that unlocked, rooted and with the phone option)
Thanks

everything you read here will work for your tab.
P1000 is the euro generic version, yours is AT&T model that has different radio/modem hardware to suite AT&T network.
Just take note of what baseband you are on (Setting - Phone -About)
After flashing CM9 following the whole overcome restock, overcome kernel 4.0, then CWM flash etc... you then need to find the same modem (search in dev there is modem thread), unzip it and extract just the modem.bin and paste it to /radio/modem.bin
disclaimer is: of course I can't tell you if your tab can then make calls and have 3G. that might be AT&T limitation.. others may know more.

[Q] ICS Rom for a SGS GT I9000T

Hello I need some help.
I have been searching the forums to see if anyone has been able to install an ICS Rom on an SGS I9000T. As you might know it all about the 850mhz band for 3G and NextG (H). I have stock GB 2.3.3 JV8 firmware installed and my phone is rooted as well, but I have not been able to find any kernel that fits the stock rom to be able to have CWM Recovery. Can anyone please help? I really want to have ICS installed, but I have no clue on how to install it and I have not been able to find anything in the forums. Sorry for the noob question... Thanks!!!