Database Develop

[Q] Which ROM/modem? AT&T, GPS, HSUPA

I haven't flashed a new ROM in awhile and really don't want to have to go through every ROM/modem combination to find one that works for my needs. I know plenty of folks here go through almost every ROM that is available so I'm hoping to pick your brains.
1) I'm NOT asking "what is the best ROM". I <3 -all- of the ROM authors and don't wish to start that kind of mess.
2) I'm willing to try a couple of combinations to see.
3) My Cappy is brand new (I just exchanged my old one under warranty since I was one of those in the original batch that got the lovely random shutdown issue even with 2.1-update1) ... not sure if that is going to matter or not but I've read a lot of posts that seem to make it clear that different Cappy batches behave better with different ROMs.
So ... what I'm primarily looking for:
* I'm on AT&T so I need 850
* I would REALLY like to get improved GPS performance ... I don't want to buy a standalone GPS (wife has one, I'll use it when I have to) ... right now even with the GPS tweaks like Skyhook I'm just not getting acceptable lock times and it loves to break lock.
* HSUPA ... I'd like to enable HSUPA. I'm fortunate enough to live in an area with a new 3G tower and small population, which means I know there is more bandwidth available so I might as well use it. Especially since on occasion I need to tether.
* I don't want to lose noise cancellation
* I would like a ROM with good battery performance
Otherwise I'm not concerned with new features ... besides the issues above I do fine with the 2.1 ROM (not saying I don't want 2.2, just saying I don't care whether the custom ROM includes custom launchers, themes, etc). I would -like- working Bluetooth + HSUPA but my version of "working Bluetooth" doesn't care about voice dialing.

PS. I've read a number of threads on ROMs and modems ... but my brain hit information overload once I started trying to match up both. I probably could have settled on a single ROM -or- modem, but trying to get them to mesh well just didn't compute.

Everyone has different experiences with different roms. I know it's a cliche but it's true. I've had pretty much no gps in a rom that boasts about gps. Best to try each rom and see if you like any.
Sent from my SAMSUNG-SGH-I897

Personally I love my combo of darky's 9.1 with suckerpunch oc/uv kernel and the tjl3 modem. I really haven't used the gps much and so I can't say about that (make sure to use faster fix to get the right region). The battery life is all day for me and I use stereo bluetooth headphones all day. I really like the look too. I don't know if it has noise canceling though. Hopefully this is helpful.

HSUPA requires an I9000 based ROM with a matching modem.
I'm using Serendipity 5.0 with a JK4 modem.

Perception 10.3 with JK4 modem + Firebird2 0.8

ua549 said:
HSUPA requires an I9000 based ROM with a matching modem.
I'm using Serendipity 5.0 with a JK4 modem.
Click to expand...
Click to collapse
OR
Andromeda with an i9000 modem.....it works

ive had mine a total of 3weeks. I went with cog. 3.04 speedmod kernel. My problem is that none of the I9000 modems would work with it. Im running a jj4 modem. For 3g
Sent from my SAMSUNG-SGH-I897 using XDA App

ke5tny said:
ive had mine a total of 3weeks. I went with cog. 3.04 speedmod kernel. My problem is that none of the I9000 modems would work with it. Im running a jj4 modem. For 3g
Does your Bluetooth work with that combo?
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
Sent from my SAMSUNG-SGH-I897 using XDA App

I primarily use the wired one. Ill try it later tonite and will Post results
Sent from my SAMSUNG-SGH-I897 using XDA App

Ok. I get static on bt with my combo....
Sent from my SAMSUNG-SGH-I897 using XDA App

The only way to have noise cancellation is to stay with 2.1. From what I understand, att is the only one to have included the noise cancellation chip and since we do not yet have an official Att 2.2 source we can not take advantage of the chip.
Not sure on this one, but doesn't i9000 based roms have the bt static issue? And is the i9000 roms the only ones that let you have hsupa? Sorry a lot of information is on this site and I am trying to learn as much as I can.
Sent from my SAMSUNG-SGH-I897 using XDA App

Pirateghost said:
OR
Andromeda with an i9000 modem.....it works
Click to expand...
Click to collapse
+1
Started with the included modem (??), flashed jk4 with CWM (didn't help), moved to Telus JL3. I like JL3 better right now.
Just know that you have to pay attention to what ROM you're using. If you're running a I9000 rom, you have to use a I9000 modem.

Thanontos said:
The only way to have noise cancellation is to stay with 2.1. From what I understand, att is the only one to have included the noise cancellation chip and since we do not yet have an official Att 2.2 source we can not take advantage of the chip.
Not sure on this one, but doesn't i9000 based roms have the bt static issue? And is the i9000 roms the only ones that let you have hsupa? Sorry a lot of information is on this site and I am trying to learn as much as I can.
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
The way to get Bluetooth to work on a i9000 Rom is to have a i9000 Rom +i9000 kernel +i9000 modem you will have both hspa plus Bluetooth working
Sent from my SAMSUNG-SGH-I897 using XDA App

yokozuna82 said:
The way to get Bluetooth to work on a i9000 Rom is to have a i9000 Rom +i9000 kernel +i9000 modem you will have both hspa plus Bluetooth working
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
But you wont have the audience chip working.
Sent from my SAMSUNG-SGH-I897 using Tapatalk

Also using Darkys 9.1 and find the battery life is great. The only I see is wifi stops connecting after 1 day or so, but a reboot brings it back up.
What improvements did you see with the suckerpunch kernel?

SSMI said:
Personally I love my combo of darky's 9.1 with suckerpunch oc/uv kernel and the tjl3 modem. I really haven't used the gps much and so I can't say about that (make sure to use faster fix to get the right region). The battery life is all day for me and I use stereo bluetooth headphones all day. I really like the look too. I don't know if it has noise canceling though. Hopefully this is helpful.
Click to expand...
Click to collapse
Also using Darkys 9.1 and find the battery life is great. The only I see is wifi stops connecting after 1 day or so, but a reboot brings it back up.
What improvements did you see with the suckerpunch kernel?

Captivate ROM
IMO just give me a Captivate ROM for my Captivate phone that's up to date without all the BS

gps1539 said:
Also using Darkys 9.1 and find the battery life is great. The only I see is wifi stops connecting after 1 day or so, but a reboot brings it back up.
What improvements did you see with the suckerpunch kernel?
Click to expand...
Click to collapse
+1
I got more or less 12 hours with that combo uv'ed to 800 mhz with active gps (my tracks) running for 3 hours, then music playing and playing angry birds and wifi active
But I had to calibrate my battery twice first
Swyped from my captivate

Please delete

Best Modem for JVT?

Hi,
what Modem would you suggest to use with GB JVT?
My wifi signal is always rather weak (no or poor signal, when other devices still have a good connection) and I also have GPS issues sometimes. I was on JVQ till today but JVT modem does not seem so be any better.
I can still remember that both, wifi and GPS worked much better when I was on Froyo...
Any Ideas?

Semaphore kernel, fastest ive used, and most reliable and has support for init.d. if i helped please click on the thanks button

Im inthe UK and found exactly the same as you. Having tried a few modems im settled on ZSJPG. give it a try m8 see what you think. Not sure on battery drain seemed no more than the others but it keeps signal where JVT and JVQ was struggling.

GalaxySN00B:0 said:
Semaphore kernel, fastest ive used, and most reliable and has support for init.d. if i helped please click on the thanks button
Click to expand...
Click to collapse
Did he ask about kernel?
I have been using ZSJPG too. Best for me. You should really try it out

Likewise, ZSJPG is the best for me too. I found battery life is loads better with it as well, I believe it's a Japanese modem that's been optimised for use in built up areas though so it may depend on the area you're in. I'm in London, and it works amazingly for me...

Erakko said:
Did he ask about kernel?
I have been using ZSJPG too. Best for me. You should really try it out
Click to expand...
Click to collapse
He spoke about Wifi. This is controlled by the kernel.
GPS on the other hand is controlled (AFAIK) by the modem.
When I was in Deutschland I ran with KG3 and it was good for both battery life and speed.
I have tried ZSJPG and that's excellent for battery life and for call quality. I found it did dodgy things to my GPS and the download speeds.

So from what cointry sre yoy? Im from germany and like tje jvs modem
Sent from my GT-I9000 using Tapatalk

Follomon said:
So from what cointry sre yoy? Im from germany and like tje jvs modem
Sent from my GT-I9000 using Tapatalk
Click to expand...
Click to collapse
EDIT: Ignore what I just said, you were on Tapatalk. From Australia matey.
On XXJVT now and the JVT modem gives me no issues but I'm on Teamhacksungs ICS Build 6. Seems to have pretty much bugger all standby battery drain unless you sync google photos to your Gallery or involve the stock email app.

it all depends on the locations you're from ZSJPG is for mainly asian countries but it works a charm on other countries i recommend you go to a german galaxy s forum and asking there such as GOAtools.de to ask

[Q] Modems how do they work?

so i have a captivate, i love it. however my carrier has limited service where i live. i have seen people say they get better download and upload speed with different modems and i myself have flashed different modems and used speedtest app to see these differences. my question(s) are really as follows
can a modem give you better reception?
is it possible to make your antenna in your phone work harder to pick up better signal strength?
in general is there a way i can learn how modems work?
thanks smart peeps!
Gorship

bump
bump for hope.

Gorship said:
so i have a captivate, i love it. however my carrier has limited service where i live. i have seen people say they get better download and upload speed with different modems and i myself have flashed different modems and used speedtest app to see these differences. my question(s) are really as follows
can a modem give you better reception?
is it possible to make your antenna in your phone work harder to pick up better signal strength?
in general is there a way i can learn how modems work?
thanks smart peeps!
Gorship
Click to expand...
Click to collapse
First, a modem us the binary file that runs the antenna. So if we were able to control and edit the binary (which we can't) you could potentially make the antenna "work harder".
so a modem works by controlling, software wise, the frequencies the antenna uses. For example, I9000 modems tell the antenna to also pick up hsupa, and that is why I9000 based roms have faster data. The modem needs to also be compatible with the kernel so it can run properly. This is why e can't use modems like JK4 on captivate based Roms.
flashing a modem can increase signal. It is all about where you are though. JK4, which is a great modem in Boston, might not be a great modem in San Francisco, or Detroit.
there is a sticky thread in the development section for this with a website that will help you pick out a new modem. Make sure it is compatible with your kernel first.
Sent from my GT-I9000 using XDA App

There is not an easy answer to this (I don't think) but here is an interesting read that may be of some help (or at least an interesting read )...
http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Linux.Wireless.modem.html

4-2ndtwin said:
There is not an easy answer to this (I don't think) but here is an interesting read that may be of some help (or at least an interesting read )...
http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Linux.Wireless.modem.html
Click to expand...
Click to collapse
as detailed as it can get..thanks for the read...

viny2cool said:
as detailed as it can get..thanks for the read...
Click to expand...
Click to collapse
True... Detailed.. However, mostly irrelevant..
When you flash a modem, you're flashing an operating system for the communications chip. It's an entire stand-alone operating system designed to minimalistically receive and transmit data. The communications chip is capable of running an entire device. This is evidant when you examine the binary. It contains keyboard, mouse and display drivers.
When the Captivate was released, it was released as a 3G device, not H, so its communications chip was configured to work as a 3G modem. This was likely a marketing decision as "3G" was all the rave at the time.
A modem won't improve your reception unless your old modem was configured incorrectly
As far as signal strength, it won't improve unless your old modem was configured incorrectly.
There are several tweaks which are applied in each version of modem firmware for different devices. Unfortunately, the communications chip is locked down/Closed-source Qualcrap.. So, we will never fully understand what configurations are available, nor can we do anything other than test and see which one works more effectively.

hey thank you so much guys, this is really interesting, sadly a little depressing but interesting. i have one last question then, since i am running my i897 captivate... with the ICS rom, does this mean i should use i9000 or i897 modems? i heard that i9000 modems were just better then i897 so i am using them... but if the above is true, i shoud be using i897 to get proper configuration of my device.
you guys are all awesome and ill be mashing the thanks button!
<3 Gorship

U have to use the specific modems for ICS... See here... http://forum.xda-developers.com/showpost.php?p=16843698&postcount=1
And more specifically...See this page... http://soggycashew.weebly.com/cm7miui--ics-modems.html

yea im flashing a few of the ics i897 vs the i9000 i was using... still though... i have full bars with my old blackberry bold 9000 compared to my cappy which has 1 or 2... i dont understand why.

Help choosing a modem.

I'm currently switching up ics roms and kernels to see which works best for me but I do not understand modems so I need some help here. I saw jk4 on the map close to me. I live in jacksonville fl and commute all around the city and west of jacksonville daily I was wondering which ones to try out.
Thanks
Sent from my SGH-I897 using XDA

donk232 said:
I'm currently switching up ics roms and kernels to see which works best for me but I do not understand modems so I need some help here. I saw jk4 on the map close to me. I live in jacksonville fl and commute all around the city and west of jacksonville daily I was wondering which ones to try out.
Thanks
Sent from my SGH-I897 using XDA
Click to expand...
Click to collapse
Just start downloading them and trying them, giving them about 2 days before you decide if you like it. Several factors to consider are call quality, signal strength, battery life, and GPS reception. Since your using ICS roms, you must use the modems packaged as CM7/MIUI. You try using something else and it won't flash.
Look >>HERE<< for all the modems you would ever want to try. (FWIW, I like BVJWW2)

Like mrhaley said, there are a variety of things that affect it. JK4 worked great for me when I was in Florida, so I would start there. JW2 is nice also, but it seems like people can't hear me as well with it.
Sent from my ICS Samsung Captivate

JK4 FTW! I've stayed with it since Eclair and it still works great now I'm on THS ICS. Great starting point to try out.
Sent from my SGH-I897 using XDA

I flashed jk4 just now. Im over my data limit so I will not be testing internet yet, if it works better I will see better battery life because service is better and faster internet? Is that right?
Sent from my SGH-I897 using XDA

I'm not sure about better battery life but call quality, data speed and connection stability will definitely improve if the modem is right for you
Sent from my ICS-powered Cappy

rheicide said:
I'm not sure about better battery life but call quality, data speed and connection stability will definitely improve if the modem is right for you
Sent from my ICS-powered Cappy
Click to expand...
Click to collapse
Better battery life will happen if it gives you better signal strength in the areas you spend the most time.
Sent from my ICS Samsung Captivate

korockinout13 said:
Better battery life will happen if it gives you better signal strength in the areas you spend the most time.
Sent from my ICS Samsung Captivate
Click to expand...
Click to collapse
Thanks for that info

hope can get some advice
Hello guys, a few days back I flashed teamhacksung's CM9 ALPHA for Captivate (BUILD 17) on my wife's phone, but she has told me that her apps are not syncing outside of a wifi connection.
I'm thinking it might be something related to the modem.
So I'm looking for any advice on which moden should I load, considering we live in Venezuela? Any tips?
Regards.

rupalazzi said:
Hello guys, a few days back I flashed teamhacksung's CM9 ALPHA for Captivate (BUILD 17) on my wife's phone, but she has told me that her apps are not syncing outside of a wifi connection.
I'm thinking it might be something related to the modem.
So I'm looking for any advice on which moden should I load, considering we live in Venezuela? Any tips?
Click to expand...
Click to collapse
Someone listed the "UGKC1" modem in use in Panama. You might consider UGJL2 or UGKG3 also, near by. Search "soggy cashew captivate modem" and check the map. Update your own listing if you find something that works.

rupalazzi said:
Hello guys, a few days back I flashed teamhacksung's CM9 ALPHA for Captivate (BUILD 17) on my wife's phone, but she has told me that her apps are not syncing outside of a wifi connection.
I'm thinking it might be something related to the modem.
So I'm looking for any advice on which moden should I load, considering we live in Venezuela? Any tips?
Regards.
Click to expand...
Click to collapse
That is a bit out of date, you probably should flash a newer build
Sent from my ICS Samsung Captivate

Thanks for the info guys, had to flash elite v. 10.1 rom, this was the only rom that would enable data service.
Tried:
AOKP-captivatemtd-build-35
F1-galaxynexus-galaxys-20120502-beta2
Nostalgia-b31-v5.4
Team ICSSGS
CM9-20120510-nightly
CNA-1.5.5
Dark Knight v5.5
Elite v.10.1 was the only rom that connected data service.
The good things is that my wife likes it as is right now, which makes it easy on me. Hehehe.
Regards.
Sent from my GT-N7000 using XDA

Signal Strength

Hi FOlks-
Have had my Captivate since 10/1/10- and its my third on same contract. Once I updated this last one to GB(stock) thats where my problems began with going to sleep andtouchpad unresponsive.
I then read up what I could and finally decided to roll up sleeves. I rooted and had on the Corn Kernel- and was underwhelmed. I then figured out how to load DOC's Master ICS v12, and while I have throroughly enjoyed it- I am having signal issues, especially in my home- that I wasn't having before. I've noticed that battery life- even after making the changes per Vibranturk- I am lucky to get 2.5 days on light use.
I have been noticing that on my Cell Standby heading- if I look at it- it tells me 10% of the time I have had no signal. I am sure this is killing battery while pinging.
Tonight I flashed Modems- first KF1, with a slight increase on my strength meter, and then KB3- with no appreciable change. I then hit the keys *#*#4636#*#* to enter service mode. I am assuming this is where I would get my signal strength numbers???? Inside my house I am getting -103 to -107. Once I step outisde- I increase 2 bars, and my strength goes to -95 or -93.
Am I stuck, or should I just try flashing back to stock GB, getting a baseline and starting all over again???
Thank you
Chris

^
Since ur r running ICS... U need to be flashing these modems --- http://soggycashew.weebly.com/cm7miui--ics-modems.html .
U will just have to keep trying til u find what works best for you. I'm currently running ugkc1 and it works very well in my area (central Arkansas).
Sent from my SAMSUNG-SGH-I897 using xda premium

Awesome!!! Thank you. I was doing some searching in the DEV section looking at titles for MODEM. I didn't see this link before. I did run across the one saying to flash KF1 before going to KB3. Tried them both with no luck.
I did see a reference to wiping when flashing a modem. Not to sound too much like a newb(I guess I am)-I know to wipe dalvik, etc when flashng a rom- I need to do same on a modem??
Thanks again-
Chris

reidcc said:
Awesome!!! Thank you. I was doing some searching in the DEV section looking at titles for MODEM. I didn't see this link before. I did run across the one saying to flash KF1 before going to KB3. Tried them both with no luck.
I did see a reference to wiping when flashing a modem. Not to sound too much like a newb(I guess I am)-I know to wipe dalvik, etc when flashng a rom- I need to do same on a modem??
Thanks again-
Chris
Click to expand...
Click to collapse
I have never wiped anything when flashing a modem.
2.5 days? I've never had this phone last that long before, even with no use.
Sent from a jelly bean

korockinout13 said:
I have never wiped anything when flashing a modem.
2.5 days? I've never had this phone last that long before, even with no use.
Sent from a jelly bean
Click to expand...
Click to collapse
Believe it or not on Eclair I was up to 4 days with not much use. This was with shutting off at night, and then I realized my Sync was turned off as well. Up till recently though I was getting 3 Sixteen hours day with juice to spare.

reidcc said:
Believe it or not on Eclair I was up to 4 days with not much use. This was with shutting off at night, and then I realized my Sync was turned off as well. Up till recently though I was getting 3 Sixteen hours day with juice to spare.
Click to expand...
Click to collapse
Tried a number of modems to no avail. Today at home I was at 20% time without a signal. I am gonna try reflashing, and if that doesn't work- I will go from DOC's Master back to a GB Rom(thinking Legend 5). If nothing else- I may get comfortable with flashing!!!
Chris