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[Q] 3g vs. H noob question

I'm running cognition 3.02 speed mod,and jk4 or kp1 and can't seem get the H signal, is it the rom Im using and is H all that much better than 3g. Thanks

rob1216 said:
I'm running cognition 3.02 speed mod,and jk4 or kp1 and can't seem get the H signal, is it the rom Im using and is H all that much better than 3g. Thanks
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H is basically like 3.5G. The speeds are all relative, and unless you are looking directly at the speeds, It's basically the same when your surfing the web. As for your connection, I haven't run cognition in a while so I don't know about that.

Dupontrocks11 said:
H is basically like 3.5G. The speeds are all relative, and unless you are looking directly at the speeds, It's basically the same when your surfing the web. As for your connection, I haven't run cognition in a while so I don't know about that.
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I don't think it is a part of Cog., but is part of Perception. I personally like Phoenix and it has HSPA enabled.

Gr8Danes said:
I don't think it is a part of Cog., but is part of Perception. I personally like Phoenix and it has HSPA enabled.
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Pheonix wass my first rom. Very very stable rom, I liked it but couldn't get over the unreliable battery. I'm on Ultimate JPY v5.6 right now (speedmod, tweaks, lagfix) and I'm getting about 18 hours with heavy usage.

Ok so if I want the H signal I need to change roms correct, not modems right? Was thinking of flashing perception anyway and using speed mod and jk4 modem. That should get me H?

Also, (for some crazy reason) it's possible when making the ROM to turn off the H and have the 3G only.
Just FYI.

rob1216 said:
Ok so if I want the H signal I need to change roms correct, not modems right? Was thinking of flashing perception anyway and using speed mod and jk4 modem. That should get me H?
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The HSDPA/HSUPA is not actually part of the ROM.
It's the Kernel/Modem that your using. It's only available on the i9000 based setups.
So if the ROM your using is i9000 based it will be enabled by default

Ya that's what I figured but when cog starts up it says i9000, but anyway I'll try perception see if it activates H.Thanks

I just flashed Perception 10.3 a few days ago and i get HSDPA.

3g/h depends on the modem, not the rom. most of the modems already have the h enabled.

mengbo said:
3g/h depends on the modem, not the rom. most of the modems already have the h enabled.
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But captivate based roms wont ever display H.
Sent from my SAMSUNG-SGH-I897 using Tapatalk

MikeyMike01 said:
Also, (for some crazy reason) it's possible when making the ROM to turn off the H and have the 3G only.
Just FYI.
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Battery consumption drops significantly if you lock the phone to UMTS 3G.
Sent from my SAMSUNG-SGH-I897 using XDA App

Just like everyone is saying, HSUPA is enabled once you install an I9000 modem.
On stock captivate ROMS (like Cognition), an "H" symbol will not appear, but you still have an HSUPA enabled if an I9000 modem is installed. Only I9000 based ROMs will show an "H".
The best way to check if you have HSUPA enabled on a stock captivate ROM is getting an internet speed test app and checking your upload speed. At my fastest, I get about 500kbps upload speeds with only 3G enabled.
I have an I9000 modem installed, and HSUPA is enabled, as you can tell from my internet speed test results, but my phone still shows "3G" because I use a ROM based on Rogers stock Froyo release.

Wow, good to know. All this time I thought the "H" was sub 3G speeds..
You'll have to excuse me, I'd been using an unlocked G1 on AT&T's network for almost two years; never had 3G until now.

Mod please delete. Thank you.

Old

good to know, i am using that rom too. you can try speedmod kernel also, for the modem, it needs to be i9000 compatible.

I have success with both firebird kernal and speedmod kernel with the kp1 modem and the jk4 modem. You could tries these modems and see if they work for you. Not every modem will work the same for every phone in any location. You will just have to keep trying them out until you find one that works for you

well about every modem ive tried. aka or rom. works. just the poor call quality or slow network speeds. i tried speedmod last night. no go on ji6. whats wierd is on cognition or the leaked 2.2 froyo they work perfect on ji6. no matter the kernel. which i tried speed mod. glitterballs .4. so ill go out and find an i9000 kernel.

I am running dill's 6.0 with kp1 modem, 2 days now heavy phone use talking, texting, browsing and downloading. Absolutely no connection issues with kp1 at all so far. No voice quality issues either.

miketucky350 said:
hi everyone. I have a captivate. live in america. Well i have had slow network speeds with jk4 jk3. jl1 jl2 plus poor call quality on the other end. ect. but the stock jh7. and the froyo leaked ji6 modems kick ass where im at. it even relialably plays youtube while on on the edge network.
Ive come down to di11is roms are the fastest. smoothest and the BEST gps. no bugs. has any one tried that modem on those roms? ie 6.0 . well i use that modem on some other roms and i know you need a matching kernel. so i flashed kernel then modem. still boot loops. anyone found a combo that works? is there a voodoo sound/lagfix kernel that works with this rom/modem. on cognition 3.04 i used .v4 gb kernel/ji6. and worked great. just have much love for di11is roms
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If you read around, the pattern for modems is location based. It seems some modems work better in areas that other modems bomb out. I am going to take a chance and say you are in Kentucky if I read your user name correctly. It is helpful to others when talking about the modem that works best for you to be a little more specific then "I live in America". America can mean many different countries. (unfortunately in todays world climate it really only means one place)
Sorry just a pet peeve of mine.
For me in central florida jl2 has been the best. I will test ji6 to see how it goes for me. Hopefully it will become a preferred modem.
Again I am not trying to be a troll, sorry if it sounds like it.

phlunkie said:
If you read around, the pattern for modems is location based. It seems some modems work better in areas that other modems bomb out. I am going to take a chance and say you are in Kentucky if I read your user name correctly. It is helpful to others when talking about the modem that works best for you to be a little more specific then "I live in America". America can mean many different countries. (unfortunately in todays world climate it really only means one place)
Sorry just a pet peeve of mine.
For me in central florida jl2 has been the best. I will test ji6 to see how it goes for me. Hopefully it will become a preferred modem.
Again I am not trying to be a troll, sorry if it sounds like it.
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I don't understand that at all..... the only real difference is if the area covered is 850/1900 or 1900 only..... otherwise how can there be a difference?

shoman94 said:
I don't understand that at all..... the only real difference is if the area covered is 850/1900 or 1900 only..... otherwise how can there be a difference?
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I do not disagree with what you say. But reading around there are very similar findings in specific areas. I will look for the threads in the morning. Nyquil kicking in.

im auctually from indiana. sorry for putting up america. At first this modem stuff didnt make sense. How 5 different modems will have 5 bars but each one has different results. would be nice if it was like a pc. windows or linux or mac. where if the drivers installed they just work. Its just such a deal breaker when i get to work and the net is just slow even with 5 bars. (jl1 jl2. jk3 jk4) but with ji6 it works great. and speed test are wayy higher. am now checking out deviant roms. found i9000 with voodoo and ji6. hmm might be able to get di11is working with ji6 here in a minute!

well tried firebird 2.0. tried few other kernals no luck. i flashed kernal first. then modem. no luck. firebird says works will all modems. ive tried. both 959 vibrant ji6 and ucji6 cappy modem. same result. sends it to boot loop. its something easy. is it because its a i9000 based rom? cog 3.04 it works with all those kernals ive tried on dillis

Super newbie Question (Modem)

first of all I installed MIUI rom a week ago ..
it took me 2 hours to just do that..
then I figured out that people are flashing thing called "kernel' which apparently makes phone faster. So i flashed glitch kernel
then I noticed people talking about modem..
what does this modem do and what is the best modem for miui rom?
thanks in advance

I am a super newbie as well.
But I think people change their modem because sometimes the phone signal (3G/2G or whatever) is just too lower than the usual.
It seems to be different phone to phone. But if your phone signal seems normal, you don't need to anything (I guess )

Feelosopher said:
I am a super newbie as well.
But I think people change their modem because sometimes the phone signal (3G/2G or whatever) is just too lower than the usual.
It seems to be different phone to phone. But if your phone signal seems normal, you don't need to anything (I guess )
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i hav good signal so im good i guess
thx for the info

candoo100 said:
first of all I installed MIUI rom a week ago ..
it took me 2 hours to just do that..
then I figured out that people are flashing thing called "kernel' which apparently makes phone faster. So i flashed glitch kernel
then I noticed people talking about modem..
what does this modem do and what is the best modem for miui rom?
thanks in advance
Click to expand...
Click to collapse
Modems are the software that establishs and controls your phone, data and gps signal. Some modems work better in certain regions or with certain carriers. Some may be best with gps, or shine at data transmission. Also if your phone supports the 850 band you will need a modem that supports that. Getting the best signal you can is important because the sgs can burn a lot of battery life seeking and finding a solid connection.
Modems are painless and quick to flash via recovery, so it never hurts to try a few out to find the best for you and your usage.
Sent from my GT-I9000 using XDA Premium App

rschenck
Thanks for this educative info.
When we think to root, we should know some know hows to avoid such issues.

Hspa+ ?

So I read that it was not possible ti get a captivate modem/rom to support 4g/hspa+
However I read several ppl on here get the h+ with their captivate?
I look thru the roms but none say hspa+...
Can someone help me out and tell me which rom I can get the h+ with?
3g ib my area is terrible I get 50kbps if I'm lucky, and h+ is available here...
Thanks so much. I really hope its possible, I love captivate and would hate to have to get a new phone...

piffdaddy420 said:
So I read that it was not possible ti get a captivate modem/rom to support 4g/hspa+
However I read several ppl on here get the h+ with their captivate?
I look thru the roms but none say hspa+...
Can someone help me out and tell me which rom I can get the h+ with?
3g ib my area is terrible I get 50kbps if I'm lucky, and h+ is available here...
Thanks so much. I really hope its possible, I love captivate and would hate to have to get a new phone...
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Unfortunately, our phones don't support H+. We can get HSDPA, and the i9000 modems can get HSUPA, but that's not true H+. However, if HSDPA/HSUPA is acceptable, try flashing an i9000 modem/kernel/rom setup and see if that works for you.

piffdaddy420 said:
So I read that it was not possible ti get a captivate modem/rom to support 4g/hspa+
However I read several ppl on here get the h+ with their captivate?
I look thru the roms but none say hspa+...
Can someone help me out and tell me which rom I can get the h+ with?
3g ib my area is terrible I get 50kbps if I'm lucky, and h+ is available here...
Thanks so much. I really hope its possible, I love captivate and would hate to have to get a new phone...
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Click to collapse
if 3g in your area is that crappy, dont think that hspa is going to fix it. it all rides on the same bands/frequencies. hspa+ is just an increased 3G. in my experience with all my '4G' devices, excluding my LTE ones, obviously, its no different than rocking an i9000 rom/modem on my captivate.

piffdaddy420 said:
So I read that it was not possible ti get a captivate modem/rom to support 4g/hspa+
However I read several ppl on here get the h+ with their captivate?
I look thru the roms but none say hspa+...
Can someone help me out and tell me which rom I can get the h+ with?
3g ib my area is terrible I get 50kbps if I'm lucky, and h+ is available here...
Thanks so much. I really hope its possible, I love captivate and would hate to have to get a new phone...
Click to expand...
Click to collapse
To clarify this one thing for ya...
Those reporting the "H+" on their Captivate were more than likely running one of the previously leaked i897 firmwares, that had that built into the leak itself. So nothing official and probably someone thought it would be cool, funny, etc. etc.
The latest i897 leaks are back to just showing the "3G".
Anyway, just an fyi.

[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
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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
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as detailed as it can get..thanks for the read...

viny2cool said:
as detailed as it can get..thanks for the read...
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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.