yashsingh1/xdaforums huggingface dataset:
[Captivate Android Development] NISMOFO:
Early morning speed test on JQ1 modem, speedmod kernel, Cognition ROM.

JQ1 modem

signal strength about -90

WCDMA 1900

6123 Down

1327 Up

Typically during the day my download speeds are between 3500 - 4000, but my upload speeds are on par with this. But this is what its capable of without a lot of traffic. I was also sitting outside my house.

I'm located in north Dallas.
[Captivate Android Development] devz3r0:
If you know a mod / admin that can, please suggest it to them :).

Also, I'm looking to remove the poll from this thread, it's not really relevant anymore to what it's become.
[Captivate Android Development] shoman94:
Yea probably a good idea.... Definitely get rid of it.
[Captivate Android Development] :
Or update the poll to reflect the latest modems. As new modems come out, most people migrate to them.
[Captivate Android Development] perosredo:
Unscientific Modem Testing in the Name of Science (and Empiricism)

Unscientific Modem Testing in the Name of Science (and Empiricism)

I got tired of 'I think this modem is better than that modem' and decided to do some almost-scientific testing. Test environment and anecdotes, as well as a link to the results are below.

Only data was tested

Setup specs are in sig and in the spreadsheet

Testing was conducted within a 3 hour span somewhere in North-Eastern Central Toronto during non-peak hours

Testing was done with the speedtest.net app and its Toronto server

I started off clearing Dalvik after every modem change but realized I could save some serious time if I didn't so I stopped. That s#!t takes forever.

After doing 2 modems and seeing some significant variance I decided to do some real-world downloading to compare it with the speedtest.net app. It was very similar--very jagged performance. I concluded that this variance is definately relevant to how a phone is used and should be included in the results.

Modems were all set to Automatic Band with 850mhz enabled; first round almost all took it, but funny thing, all the modems I did a 2nd round on reversed their band selection--that's why this isn't very scientific.

I did 5-8 iterations of speedtest; I filtered out the outliers (highest and lowest) and chose only 3 to enter into spreadsheet; the original idea was to then average out the times--and I even left room in the sheet--but this proved unessecary; interesting outliers are noted

JK4 smoked everything; JPG second

On Round 2: JK4 was tested last and just blew everything else away; considering this was now later into the night, and thinking that the timing might have played a factor, I immediately flashed what at that time was the next-best performing modem (JL3) to make sure the results weren't tainted--they weren't. I also then flashed the next-next-best performing modem (JPG) and ran it through 10 tests; and then JK4 again last. Turns out JPG in fact performed second best.

I will not be doing any more testing.

Link to Google Apps Spreadsheet

Yes, speeds in Toronto are this bad.
[Captivate Android Development] shoman94:
Were you in the same spot with the same signal everytime?

What signal (-db) were you at?

For me though.... There is more important things then flat out data in a very good signal area.

Appreciate your time though.
[Captivate Android Development] psycho2097:
i have a problem, i use jk4 modem, but when i set my band to 850, i dont get any signal, i mean completely cut-off!! wcdma 1900 gives me 3mbps dl n 1.3 ul. is there something wrong? i m in greenville, SC.
[Captivate Android Development] perosredo:
Exact same spot. No idea about the -db; but I do not have strong signal. I am 5-600 meters away from the closest tower. If not more.
[Captivate Android Development] psycho2097:
pls pardon my noobiness, but what about jpp? i did a bit of the same thing u did, with jl3, jl2, jk4, jpp and jp5, and jpp was 3.5/1.7 all around, whereas, jk4 was 3/1.3.
[Captivate Android Development] perosredo:
I guess I missed that one.
[Captivate Android Development] jayjr1105:
Does this thread apply to vibrant users as well or is there a seperate modem thread for the vibrant/tmobile?
[Captivate Android Development] shoman94:
You can use the same modems
[Captivate Android Development] devz3r0:
As far as I know, only moderators / admins can remove / edit polls.
[Captivate Android Development] AdamOutler:
I'm getting instantanious GPS lock and 4-5 bars where I previously got 3. Good work.
[Captivate Android Development] :
I know, but we would have to get a Mod to sticky this thread anyway. I was merely suggesting that instead of editing the OP to take down the poll, that when a Mod does sticky this thread, that they can take 30 more seconds and edit the poll to reflect the last 6 or so modems so that the poll is up to date again. Just an idea though.
[Captivate Android Development] tietherope:
Wow those speeds are quite bad. I haven't tested in Toronto, but just up here in Markham I hit 5+Mbps down and 4+Mbps up.
[Captivate Android Development] golfslicer:
Anybody else having a problem changing the KB1 modem to 850 band with *#2263#. I get restricted and won't let me change to 850.

I am running a Captivate Kernel by exitz. Is their a better captivate modem out to run on a KB1 rom running a captivate kernel. I could run a i9000 kernel with the JK4 modem, but the captivate kernel seems to be better?
[Captivate Android Development] geokilla:
Sure you're not on WiFi? I've never seen 4+Mbps upload and I'm close to Markham by Don Mills and Steeles.
[Captivate Android Development] MaxRabbit:
I always get 11 mbps up in Speedtest when I'm on GPRS (little G in the notification bar). Bug or not, I always feel like a G when I see that ;)
[Captivate Android Development] shoman94:
:cool: Modem Test :cool:

I decided to setup my own test featuring a block of modems that have 850mhz by default and the lower block require a little bit of effort to get them flashed on to work properly with the 850mhz band.

These are speed test with perfect signal (-75db to -85db) all using the same local server. 5 runs for each and omitting the highest and lowest of each.

Rom Used was Continuum v4 (JS8) SP#59 Kernel

From the looks of things the upload is capped no matter what modem in 850mhz.

Anyways.... I'll be using many of these modems and I can tell you that I will post which modems can perform in low signal areas ( -110db to -105db which is typically no bars to one bar) without timing out or just sitting there for what seams eternity.

I will also be testing voice quality during my highway commute. I can tell you that some of these modem sound pretty bad on the highway using the phone with no BT headset.

Here is a link to my spreadsheet: https://spreadsheets.google.com/ccc?key=0ApYTbSdHpKoMdHFEbzRyNUJhR2twc19TRFRlMGJ3V1E&hl=en&authkey=COmFsLgO
[Captivate Android Development] MaxRabbit:
Please don't test on the highway. No deaths needed.
[Captivate Android Development] shoman94:
lol... not data tests..... voice test. Its a very good indicator for background noise in a public place.
[Captivate Android Development] harpo1:
I looking forward to your final thoughts on JS1. Data speeds looked really good on your test.
[Captivate Android Development] shoman94:
Yea thats one reason I jumped on it. Never tried it. Left myself a voice mail with the TV pretty loud and barely heard it so I'll see tomorrow. I'll be testing highway background noise, how it acts switching to different bands during a call and at idle. Also data usage with very low signal. I'll be able to look at battery consumption also.
[Captivate Android Development] harpo1:
How are you watching band switching while on a call? BT?
[Captivate Android Development] shoman94:
Yes.... That is the way. I listen for pops or dead spots when it switches bands and towers. Lucky for me my signal varies from -50db to -110db on my 30 mile stretch.
[Captivate Android Development] fractaline:
This is the kind of testing that seems needed to really know which one will suit your needs / location.

i alwasys check the -dbm before a test and it certainly makes a difference.

also time of day , in relation to network load........

BIG differences for me... the shots are of some tests last night , the one with charging battery is kp1, the one with 39% is jk4. all tests in the same spot with -85 or better signal.

for me kp1 is more spotty if a little faster it's only at the optimal zones/times

i'll keep on it with jl3 and others......
[Captivate Android Development] mcmac7:
anyone tried the new JPJ modem? is it 850?
[Captivate Android Development] perosredo:
Aren't JK3 and JK4 the same modem?
[Captivate Android Development] zerkai:
No they're not, lol come on now.

I897, Tapatalk-

I have spoken.
[Captivate Android Development] zerkai:
Download link?

I897, Tapatalk-

I have spoken.
[Captivate Android Development] shoman94:
There is a jpj rom but its paired with the jpg modem. Other then that I have not seen anything else related to jpj

Sent from my captivate.
[Captivate Android Development] Yuna:
Well, JK4 as far best for speed. But which ones are having better reception, and which ones are conserving battery?
[Captivate Android Development] shoman94:
I don't know if I'd say that. It's definitely a lot less reliable. Speeds vary greatly from min to max. Voice reception and battery are at the top of my list to look at.

EDIT: lol.... Thank you swype!

Sent from my captivate.
[Captivate Android Development] joeybear23:
color me confused...
[Captivate Android Development] MaxRabbit:
How is babby formed?
[Captivate Android Development] shoman94:
What can I say... It was a quick swype and I didn't have a chance to proof read it....lol

Sent from my captivate.
[Captivate Android Development] :
JK4 was always my go-to modem. It performs very well in al areas and has decent dl/ul speeds... until I flashed JQ1 the 850 way. It doubled my battery life on Serendipity 6.2, fast and acurate GPS, fast and strong wifi, solid BT, cell signal and call quality beats JK4 by a mile. 4th day on it now and only awesomeness is spewing from this modem. No hiccups or anything, its a consistant performer!
[Captivate Android Development] shoman94:
Yea its definitely a good modem. Right now for me jpg is still king then jq1. But, js1 is nipping on jpg's heels. We shall see.

Sent from my captivate.
[Captivate Android Development] madmack:
same thing here. JQ1 is giving me unbelievable battery life, insane GPS performance and very good voice call quality. I also noticed some speedups in data as well, haven't tested that thoroughly though.
[Captivate Android Development] Yuna:
Testing jq1 for a day now. Yes, amazing battery life in 3g mode.

Gps for me is 50/50... But I don't use it :)

Call quality is good.

Battery didn't dropped any percent for 4 hours in a pocket.
[Captivate Android Development] joeybear23:
understood...

been there
[Captivate Android Development] joeybear23:
Can we get CM7 CW versions of these modems?

I am sure I am not the only person who wants to try a few of these on CM7.
[Captivate Android Development] {Angel}:
The problem with the modem preferring 1900 over 850 might be due to 900 Mhz being enabled, try not selecting automatic but selecting the bands manuall and leave out 900. Still personally I think a native 850 modem has less quirks (like JL2)
[Captivate Android Development] geokilla:
What do you mean flashed it the JQ1 way?

How do I check what band I'm using again?
[Captivate Android Development] shoman94:
Having the 900 band enable is not an issue. All the modems prefer 1900 for this phone prefers 1900mhz.
[Captivate Android Development] harpo1:
shoman94 give us the scoop on JS1.
[Captivate Android Development] shoman94:
I'm liking JS1 so far. Speeds are great and the data at low signals is good. I can't say its as good yet but so far it is.... I need more time with more situations. Voice quality is good.... Handled background noise very well on the highway. Battery life is on Par with JPG... maybe little better actually.
[Captivate Android Development] harpo1:
Where can I get it? I want to try it out.
[Captivate Android Development] shoman94:
http://s148368836.onlinehome.us/modem_bujs1.zip
[Captivate Android Development] spradling:
Shoman or anybody,

Can you tell me how to go from JK4 to JQ1 or JS1?

I'm looking to improve batt life.

The procedure is JK4-->JL2-->enable850-->JJPD-->JPG-->JQ1/JS1 ??

Why so complicated? LOL, why can't we go JK4-->JS1?

I followed your signature link but I'm not sure what to do, I did the *#2263# but I don't know how to "select automatic the combi bands and add wcdma850"

Thanks in advanced :)
[Captivate Android Development] shoman94:
Are you using the 850mhz band where you are?

If you are not then there is no need.... just go to whatever modem you want to try.
[Captivate Android Development] harpo1:
Thanks. Is it cwm flashable?
[Captivate Android Development] shoman94:
Yes.............................................
[Captivate Android Development] spradling:
Yes, using 850mhz in my country.
[Captivate Android Development] shoman94:
Once your in *#2263# click on the word automatic, then menu and back, then click on combi bands, then click on wcdma850 and back out....
[Captivate Android Development] geokilla:
I already have all the bands, so I think I'll just flash with JQ1 and see what happens.
[Captivate Android Development] JJ133169:
what is the best band for AT&T here in USA?

Best band for least dropped calls?

i thought AT&T phones were GSM and verizion CDMA?

so is it best to have it set on wcdma automatic or just have it set on 850? and is there any I need to disable? or just setting it to "default automatic" is that okay?

right now im on JL3
[Captivate Android Development] shoman94:
What rom and kernel are you using?

IMO it's best to leave it in automatic.
[Captivate Android Development] joeybear23:
Okay, here are some modems that are flash-able with CM7.

***WARNING - If you are not running CM7, DO NOT TRY TO FLASH THESE ZIP FILES***

Disclaimer - If your phone works better with these, great. If you develop canker sores and gastrointestinal problems as a result, it's not my fault. Flash at your own risk.
[Captivate Android Development] JJ133169:
I am on ultimate rom v 5

2.2

and kernal is 2.6.32.9 hardcore@speedmod-i897 -k12i-500hz#116 on a I900 rom.
[Captivate Android Development] madmack:
For me in Boston it was JQ1.

AT&T is indeed GSM. What you see in the menu is WCDMA, which is synonymous with 3G and HSPA. Different technology than CDMA used by Verizon and Sprint.
[Captivate Android Development] JJ133169:
so whats the big difference in these modems? I mean what makes a "modem" ?

and I'm assuming the quality difference is Better/worse signal., more/less dropped calls, failed messages, call quality, ect.
[Captivate Android Development] Aus_Azn:
Why haven't you upgraded to the latest Cognition? You're quite behind now, considering it's on 2.3b8 now...
[Captivate Android Development] kamots:
nice! will try it out:D Fwiw jl3 works amazing on assonance 5.2 great batt life and gps. data is around 3mb down and 1.5 up:D
[Captivate Android Development] richsale:
I'm very new to this so please don't jump on me. I'm running DG's 2.3b8 on my captivate and it is as stable a rom as I have found. My problem is when using as a phone there is a lot of static and drop outs. My question is how do I change the modem within a a rom?
[Captivate Android Development] kamots:
disable your lagfix ( reboot) put modem on root of sd card, and flash through recovery:D
[Captivate Android Development] Dani897:
i dont think there is any need to disable a lagfix. also these modems dont always work on captivate rom/kernels which cognition is. you might want to consider perception or an i9000 port. perception is currently based on the telus t959d rom which is basically a vibrant and wont have any useless buttons for video calls or anything.
[Captivate Android Development] richsale:
Thanks kamots, I'll give it a try. Am I restricted to which modems I can use ?
[Captivate Android Development] kamots:
just as a personal preference i try to match kernels and modems (ie. I9000 kernel with I9000 modem) most of these are I900 modems i believe. a safe bet for a kernel is xcal's reorient kernel so every thing works for the captivate. Has worked for me on several of the roms in here :D as far as disabling lagfix, i do it out of habit, and just to err on the side of caution. takes more time but worth it imo:D
[Captivate Android Development] ajm786:
I run Perception 9.5. I've since flashed about 4 different modems, and never have I had to disable the lagfix; this has not caused any type of malfunction on the part of the modems that I have been flashing, so I don't think it's necessary to disable the lagfix.

Does anyone have any info on how good the just released modem is now compared to the previous ones, say, JL3?
[Captivate Android Development] kamots:
I left jl3 to try the new modem and from my experience for the past 2 hrs batt life dropped like a rock. down to 85% with very little use.( maybe 10 minutes of listening to music, speed test, and a static test of gps. Gps locks great outside, granted i wasnt moving. data was 2 mb down 621 kb up .) long story short i am in the process as i type of going back to jl3 :D I know i probably didnt give it a fair chance but jl3 is amazing for me:D
[Captivate Android Development] ap1618:
the whole process of backing up my 150 apps and reinstalling is putting me off...
[Captivate Android Development] Pirateghost:
its called titanium backup

its what? $5? completely and utterly worth it...you dont have to click on each app, it does BATCH backup and restore
[Captivate Android Development] aleadam:
Get TiBu Pro and for a few bucks it will do it with almost no interaction from your part. It becomes so easy that you won't ever mind flashing new roms.

Edit: Lol! I should refresh the thread before answering!
[Captivate Android Development] h8rift:
This is correct. No need to remove lagfix.

Lagfix can affect /system /data /cache and /data/data.

Modem is located in /dev/block/bml12 (I believe its 12...).

Hope this helps those who are wondering :-)

Thanks!

-h8
[Captivate Android Development] kamots:
It does. What about a nand back up and restore? We still have to disable it for that right? Also might be a dumb question but can we just flash any modems from the vibrant forums? Or do the devs do something special to them so they work with the captivate. Was thinking bout trying jl5, but I really don't need a paperweight lol
[Captivate Android Development] abacon15:
Can you put JL3 up ib the op please? Thanks!
[Captivate Android Development] ap1618:
oh! oh! so that's the secret! it's in the paid app! i was wondering why the hell i had to install 150 apps back manually!

thank you thank you! and thank you in the thanks meter... :)
[Captivate Android Development] aleadam:
That, and dropbox sync. And supporting its development, of course :cool:
[Captivate Android Development] punisher2008:
just would like to note i tried out the tljl3 modem, this is what my test results were Down: 1021 kbps Up: 752 kbps, call quality not that bad but couldnt get a signal lock the gps icon kepted on dissapearing dont know if that is due to the rom though am running darkys 7.5 and am going to upgrade to 7.7 when i get a chance

also the battery icon showed 100% all day which was very strange to me since i had been texting all day came home and plugged my phone into my computer to load on some files and unplugged my phone and it said that i had 32% left

then i installed the modem ugjl2 and it said that i had 20% left but right now i have a download speed of 882kbps and uplaod of 851kbps
[Captivate Android Development] Radukk:
Tested JL2 on JPY ROM

*#2263# -> [3] GSM BAND -> [1] GSM ALL] -> Select GSM All Bands -> Back -> [4] COMBI BANDS -> [8] WCDMA 850 -> Add WCDMA 850

JPY modem: even if I select 850 only, *#0011# shows it connected to 1900 band.

JL2 modem: correctly connected to 850 band. Yay :D
[Captivate Android Development] devz3r0:
That's because the JPY modem doesn't have the 850 band.
[Captivate Android Development] shoman94:
Depends on what you are coming from. Read the post in my sig.

Sent from my captivate.
[Captivate Android Development] spradling:
Excellent, thanks a lot shoman, will try now and post results.

Also thanks for the updated instructions on the link in your sig :)
[Captivate Android Development] geokilla:
Yea I came from JK4. I checked the 2263 menu before and after flashing JQ1 and I still have the same settings as before, which I think means it works fine.
[Captivate Android Development] spradling:
Thanks a lot for your help shoman, happily upgraded from JK4 to JQ1 using your instructions :D
[Captivate Android Development] Sqb:
+1 you guys on xda are hands down the best.

Sent from a rock on fire in the middle of the sea
[Captivate Android Development] Ikonomi:
Anybody have opinions on call quality on JPG? I got a call from a friend yesterday in a slightly noisy environment (coffee shop) and could NOT hear him. Incoming sound was actually much clearer on my cheap Bluetooth headset, but if the modem were the culprit, quality should have been crap on the headset as well, right?

Just trying to figure out if it was my phone or his performing so poorly.

Perception 10.2 | SpeedMod K13D | I9000ZSJPG
[Captivate Android Development] psloan:
I am in Seattle area and I could not get jpg to be nice to my battery. I have swapped back to JL2.
[Captivate Android Development] geokilla:
How do I check if the WCDMA850 is working? I have it selected on JQ1 but the signal quality is average.
[Captivate Android Development] harpo1:
Go into SGS Tools and select secret codes then scroll down to GSM Status and select it.
[Captivate Android Development] eliminat:
Yesterday AT&T was working on their towers near me in DFW, Texas, so there were a lot of up and downs. With JQ1 I was watching it switch between 1900 and 850 all day depending on which signal got stronger and which dropped. It switched quickly, without interruption, even during calls and data.

I've tested most of the modems, and JQ1 has been the first modem to come out that I have dropped JK4 for. If you have any trouble with the modem, just follow the procedure at http://xdaforums.com/show...&postcount=438 and that should take care of it. For many, including myself, that process was unnecessary though.
[Captivate Android Development] shoman94:
Like I posted in my instructions..... Once the modem of your choice is loaded (jq1) then select automatic, them go to combi bands and add 850. Then reboot.... Don't reboot before you re add 850 before from combi bands.

Sent from my captivate.
[Captivate Android Development] geokilla:
When you say enable WCDMA850, do I have just WCDMA850 enabled and nothing else?

And out of curiosity, is there a reasoning why we have to flash the modems like this? Or can we blame Samsung and their poor firmware support as usual?
[Captivate Android Development] H3llstorm:
That worked. Now to see if it's worth it...
[Captivate Android Development] chase10784:
I did the instructions on JQ1 and I have to report I am getting the best reception I have gotten with any modem I have tried thus far. I am in the Dayton region in Ohio.
[Captivate Android Development] shoman94:
Yes that band only.

I don't have an answer for you... But if we want good modems that's how we have to do it.

Sent from my captivate.
[Captivate Android Development] mbc663:
Page not found
[Captivate Android Development] shoman94:
http://xdaforums.com/showpost.php?p=12156313&postcount=438
[Captivate Android Development] mbc663:
Thank you sir.
[Captivate Android Development] Nucleartx:
After getting tired of JK4's bad call quality regarding background noise, I flashed jpq then did jq1. 850 did stay after the flashing, 2nd reboot netted me sitting on 850. Now the test of call quality. 2.6/1.3mbps so far.
[Captivate Android Development] shoman94:
You'll like it. JQ1 and JPG have the same call Quality... best in my book. Still testing JS1... very promising