yashsingh1/xdaforums huggingface dataset:
[Captivate Android Development] someonemx:
i have a couple moths using UGL2 modem, i just can say is rock solid!!

i have tried JPD, JPG, JS1 and JQ1 too, following the flashing order, and everyone of theme use 850 wcdma band, but when i switch from 3G -> 2G then go back 2G -> 3G, the modem does not connect 850 MHz, that problem does not happen on UGJL2

for me battery drain with JQ1 is so great, it consumes very little battery, but i have tha problem mencioned earlier so i continue to use the "old" rock solid UGJL2.

i'll be watching new modem relases.

thanks all for sharing your test result in this useful thread.
[Captivate Android Development] shoman94:
That's because it's not native on the other modems. Better off just leaving it alone.
[Captivate Android Development] MPKO:
Hi everydody ! I'm new in xda but old in wcdma business. I have been reading through your posts and i have found lot of interesting things,and thanks for that.

One of my concern is that your results/ views of different modem behavior/battery consumption result can be a bit miss leading for the big audience following this thread. I would recommend you to define a simple specification what need to ne tested, in which radio enviorement, time of a day...and what need to be reported to really be able to compare the functionality between different modems.

Main difference between modems are mainly:

A) features: cabability information what is send to the mobile network as bands, hsdpa, hsupa etc...

B)other features: fast dormancy, pre8rel fd... these are effecting mostly to your phone battery efficiency

C) applications used... gtalk,fring kind of apps will kill everybody's battery at no time...

C) and then the basic desing of modem like brand etc.

I think basic specs of test would help this briljant community to define a better picture of modems what should be used in diffrent places/ radio enviorements of mother earth.

Cheers :)
[Captivate Android Development] garringm:
I would like to see more of this information, my question is are some of these modems updates for others if they are what were they supposed to update, take for instance with info given I assume that the JQ1 is an update to JPG is it? why was it an update and what was it fixing or making better I know to put something like this together is time consuming does anyone know of anywhere else I may find this info
[Captivate Android Development] caanda45:
I commented earlier on my mistake and the band 5 wcdma changing to a 6, what I find now is that if I go into settings> wireless and network>mobile networks>network mode and change from auto GSM/WCDMA to GSM only and then switch back the band gets changed back to a 6 and of course no service. I manually change it back and leave it on auto everything is fine.

What the heck have I done? I guess I can never change it and call it a day, but i am concerned I may end up in an area with no 3G and need the GSM will it switch and give me service? Perplexed on this one????
[Captivate Android Development] garringm:
Not real sure if I remember correctly you are trying to use the JS1 modem, my thoughts on the JS1 modem is its unstable, some can run it, some can't some have problems. I think you would probly be better off with jpg or jq1, I have given up on JS1
[Captivate Android Development] sjavvaji:
went from a forced 850mhz jl2 to a forced 850mhz jq1 and I have to say so far no complaints...i get slightly higher network rates but I can't comment on battery yet since I only switched 2 days ago...i like that we have so much choice being able to use 1900 default modems with the 850 band
[Captivate Android Development] caanda45:
Good thanks it was a toss up and maybe that is just some of the issues with the JS1, my other choice was the JQ1, on that now and will try it out.!!!! I just don`t want any hassles.
[Captivate Android Development] froli13:
Weird because I had problems with JQ1 and JS1 is perfect so far!
[Captivate Android Development] caanda45:
Just tried the sequence that caused the problem earlier and the issue is now gone on JQ1...interesting....also seems a little louder than JS1.
[Captivate Android Development] shoman94:
If you have the time to do all these things... have at it. I do what I can with the time I have to try and give these modems a fair shot. For real... all that is needed is for people to try the modems for themselves and use what works for you. There isn't gonna be a one all modem for everyone, but IMO there is one modem for majority. If I didn't find the method I did for flashing modems we would just be stuck with 4 modems and are native to that US bands. Now we have 2 more from Latin america but I find the voice to be terrible in a noisy environment. So to each there own. Now we have A LOT at our finger tips.

There are no change logs released... there are no individuals that on here that seem to know anything about modems and all I can do is use them and post what I think.... I'm not a software engineer and the modems are bin file.... 1's and 0's. without have the map from the software engineer on what each function does, we can't do any reporting. I wish someone from samsung could come out and tell me these things... and I would definitely do whats needed to make these modems better for us in the usa. I'm sure a few bit changes could make these modems prefer US bands and maybe even prefer 850...

It will switch to gsm and work properly. I don't understand why people feel the need to force a certain band.... the modem will go there when needed. I believe in letting the modem do its job.
[Captivate Android Development] geokilla:
But it doesn't switch to GSM when we want it to, like say after hours of inactivity or whatever. Some people like to force it to 2G mode in order to save battery, or because they have no data plan.
[Captivate Android Development] shoman94:
I always switch fine to GSM when there is no 3G. If they don't have a data plan they can disable data in 3g data which is the main cause for the extra battery drain. You can also disable HSPA so it uses UMTS. That saves battery. Lots of options.... but to each there own.
[Captivate Android Development] froli13:
I live in an area where I only have good reception on GSM850 but every modems I tried want to stick to WCDMA850 and takes forever to switch to GSM850...

You know what would be perfect? An app that automatically switch to GSM when wifi is on and set it back to auto when wifi is off. Let me know if there's already an app for this.
[Captivate Android Development] LNJ:
So far so good. Seems to be defaulting to 850 for me!
[Captivate Android Development] froli13:
Same install procedure as JQ1, JS1, JPG?

Can I jump directly to it from JS1?
[Captivate Android Development] shoman94:
I see what your saying....it will hold onto 3g more but maybe you can try this:

*#0011# then Menu>back>phone control> acquisition order.

The choices are Auto/GSM>UTMS/UMTS>GSM

So you can make it prefer GSM over UMTS. Not sure if Auto would prefer the stronger? Give it a try.
[Captivate Android Development] garringm:
shoman...the only thing I will add and maybe you would care to verify by doing so is using the nvp1 modem to flash JPG or JQ1 modems this has worked for me rather than using your method granted I make sure I am on the 850 band, BUT!!! and this is a big but I seem to be able to utilize 1900 bands just as well in my normal day to day routine. Both signals seem to be equally strong where I use my phone the most. I do appreciate all the flashing you have done to your phone as I have done probly just as much trying to find a modem that works for me, and I will warrant caution to everyone reading.... !!!! extensive over flashing will cause problems in the long run it will eventually destroy your phone. !!!! Tust me I know this from experience

@froli13 I made that post because * I * don't think this modem is a good choice for the masses that are just toying with modding their phones, this and many other mods should be left to those that 1 aren't afraid, and 2 have "advanced" experience in flashing and other ways around android without having to ask every step of the way. This modem doesn't seem to be stable (for lack of a better term) I think if someone is just joining us and coming from stock I whole heartedly believe the jk4 modem is the best choice next choice would be jl2 then moving on up to jpg. I only don't pick jpg as top choice because of the flash trick and on my phone it continues to jump from 3g to H in the Not. Bar. This would bring on many many unwanted questions and post. I have tried and triie and tried for 3 days working on the js1 modem and I cannot get it to work on my cappy so I gave up

@caanda I am glad that you got your issues worked out

I have done a lot of searching online trying to find any info on these modem updates and can't really find anything, so lets refine the question/request... what particular modems are updates to others, because typically updates fix things and things like this only come out as updates, as I read the first post we have 4 different types of Modems, Aries, Captivate, Gingerbread and ??SP6160?? am I too assume that these are based on where the phones are manufactured and what specific hardware is used, FYI I'm really not trying to cause any confusion I'm just trying to understand why JL2 might work better than JK4 these are just for reference only
[Captivate Android Development] shoman94:
Yes same procedure but since you are on JS1 you can flash directly to it.
[Captivate Android Development] froli13:
Thanks for the answer I'll try this. Do you know if it will stick after flashing a new modem?
[Captivate Android Development] shoman94:
Well, when I say that the modems prefer 1900 is because they do. You can have you phone sitting in the same spot... for example my armrest. 1900 gives me -85db and I force it to 850 and have -76db. Well I'll go back to auto and eventually it will go back to 1900mhz and stay there. Even thought eh signal is stronger on 850 it sticks on 1900 until the signal is bad enough to switch over.

SO anyways.... I haven't seen nvp1 modem?
[Captivate Android Development] shoman94:
Not sure.... I tried it... it was on UMTS>gsm and I went to GSM>UMTS and rebooted but it is still going on 3g. Not sure if it will only really help in your situation. Maybe if the modem sees more GSM towers it will prefer GSM. Here they stopped broadcasting in gsm1900.
[Captivate Android Development] froli13:
Even if it doesn't stick after a reboot it's fine. I have this problem only when I'm at home. Elsewhere, WCDMA850 signal is good.
[Captivate Android Development] shoman94:
It does stick after reboot..... just not sure if it stock when flashing a different modem.
[Captivate Android Development] garringm:
sorry shoman my stupid drunk fingers, that would be the kp1 modem, during my untechnical testing one day I noticed I could use this modem to flash the others. How is the new modem working out so far. Really not a big deal though just thought it could save the others a step in flashing granted the kp1 modem is good for those wanting data speeds rather than call quality
[Captivate Android Development] {Angel}:
Does JVK have the 900 band by default?
[Captivate Android Development] froli13:
Looks like JVE not trying to get WCDMA even if signal is bad. Almost always connected to gsm850. Going to give it a try for a couple of days and see how it goes.
[Captivate Android Development] LNJ:
So far this modem has been great as well.

Wcdma 850 and 1900 are the only ones enabled by default!
[Captivate Android Development] shoman94:
I'd have to retry it... I remember trying it once and it didn't work but I'll look at it again. If that's the case then I'll update my thread.

So far JVK is looking good... it gave me the fastest data speeds so far and voice quality is nice. I haven't tested it in the car yet and haven't tested a poor signal area with data. That will likely be monday.

Yes

Funny how you have an opposite effect. I'm not on JVE though. But I bet it's related to the amount of towers the phone sees at one given time.
[Captivate Android Development] shoman94:
This modem is not 850 by default. If you were on one of the other one with 850 working then you would also get it flashing this one.
[Captivate Android Development] Swishaa:
Anyone have any input on the voice quality of JJPG ?
[Captivate Android Development] fractaline:
I didn't test it but i believe the reason that it is the go between is because of the poor call quality.

just dl'd jvk looks hopeful :D

THIS THREAD NEEDS TO BE STICKY'D
[Captivate Android Development] MPKO:
Juicedefender!
[Captivate Android Development] Sqb:
Jvk looking good so far. Holding on and call quality good. Don't use bluetooth so no telling on that

Sent from a rock on fire in the middle of the sea
[Captivate Android Development] harpo1:
Does it use 850 by default or did you have to do the trick?
[Captivate Android Development] Sqb:
I tricked it. I was on js1 already so I flashed right over that but had to trick earlier in the week to get to js1. Battery holding up good. I live in the backwoods so I leave mine set to 850 only. Not to sure how it does on auto either.

Sent from a rock on fire in the middle of the sea
[Captivate Android Development] chase10784:
So for those who are using jvk how would you compare it to JQ1 as far as battery life, call quality, signal strength, and overall stability? Data speeds are relatively useless for me as i use WIFI most of the time. JQ1 has been pretty good for me, much better signal and call quality for it over JK4 (my prior most used modem).
[Captivate Android Development] garringm:
I went to bed last night with jq1 flashed to my phone, no programs running, not even alarm clock 92% @2:42 ---> 89% @9:00

gonna have to go at it again tonight just to make for certain
[Captivate Android Development] LNJ:
I see. I went from JK4 to JL2 to JJPG to JVK.

Wasn't aware of any trick to enable 850 since it just worked for me from the start.
[Captivate Android Development] shoman94:
In my opinion JJPG along with JJPD and bad voice quality in a noisy environment like being in a car on the highway for example.

I answered this one already... it's not default.

I've only had in on one night so far. I only lost a few % overnight but I didn't monitor it as I fell asleep without checking...lol

Since you were on JK4 you could have went to JJPD or JJPG to JVK.

Also setting it to 850 is not a requirement but there is a better chance of it working properly if you do set 850 prior to flashing. So I would rather share the most promising method of getting it flashed correctly.
[Captivate Android Development] sjavvaji:
where can i find a jvk modem cwm?

nevermind...just extracted it myself
[Captivate Android Development] shoman94:
http://xdaforums.com/attachment.php?attachmentid=552761&d=1301172636
[Captivate Android Development] fezzy102:
what did i do wrong flashing to js1 i went from jk4 to jpg then 850 enabled then to js1 and have no data or signal.
[Captivate Android Development] LNJ:
Good to know. Thanks.

So far I have noticed that JVK does jump between 1900 and 850.

If it goes below 2 bars in 1900, it automatically switches to 850. But other than that, it's upload speeds are good even at 1900.
[Captivate Android Development] shoman94:
Follow the process in my sig to the T.
[Captivate Android Development] devz3r0:
XXJVK added to OP.

Timestamp: 2011-Mar-20 13:16:42
[Captivate Android Development] ccdoggy:
Does this work even if there is no WCDMA 850 service in my area?

could use that clarification in your directions, thanks.

Edit: Just flashed the xxjvk modem following your directions and I get no service, rebooted a few times and confirmed its on auto band selection and all are selected.

Edit#2: eventually forced it to use a known band around here, rebooted and got service, then selected automatic and now hopefully it will actually be automatic and not just select the last thing i had forced. its working and will report back with results.
[Captivate Android Development] timn2bama:
KP1

Ok I have been on KP1 for few days now seems to have louder call quality here in my area download speed average around 3.4 and uploads around 1.2. But does it post to jump back and forth from 850 to 1900? Just wondering. Battery been pretty good to!
[Captivate Android Development] MPKO:
Jumping between different freq debends of your modem sensitivity and your operators inter freq handover settings. Operator is able to trigger this based on the rf quality measured by your mobile ( rscp and ecn0) or load based issues in the network.

Please keep your settings in auto mode, thisway you will get the best performance if your operator knows what they are doing...

Cheers
[Captivate Android Development] timn2bama:
ok thanks! I was just wondering if it was the normal thing to do jumping back and forth.But I learn something new in these forums everyday! lol
[Captivate Android Development] shoman94:
Yes that is why I recommend to leave it on automatic.
[Captivate Android Development] acandia007:
newb question, but we do need a gingerbread based rom to use the JVK right?
[Captivate Android Development] shoman94:
No... I've used them on JS5,7 and 8
[Captivate Android Development] acandia007:
awesome!. Gonna flash it right now!
[Captivate Android Development] WickedNite:
Do I need to do the "Magic Steps" for JVK to work in 850?
[Captivate Android Development] Nucleartx:
Its all region dependent as far as I can tell. In Texas, I've tried them all but only jq1 gave me 4.5mbps down in the middle of San Antonio mid day. Got multiple 3+ mbps in Austin. It is the ONLY modem that all but once locked up on upload with HSUPA.
[Captivate Android Development] shoman94:
You can try it from KP1. I haven't in quite some time. Just go in and change it to 850 then flash and see what happens. If it doesn't work then you can just start over from one of the first 4 in my instructions. Let me know how it works out.

That could be but I think it is just more than region dependent. I think it is ROM base dependent also.

I had the lock up for a while up here with uploads. After about a week or so the uploads with speedtest went back to normal.
[Captivate Android Development] eliminat:
I've been using jq1 in DFW area with firebird2 kernel and cognition 3.04 and haven't had a single lockup.
[Captivate Android Development] rajendra82:
I'd like to post in here that my i9000 modem search on a build 1007 Captivate may have yielded a winner now. A bit early to know for certain, but my ZNKP1 flash does not seem to be suffering from the bug where I would get disconnected from towers when charged to 100%, and randomly at other inopportune times. This bug made me stay away from all the awesome i9000 kernels till now, and prevented me from trying CM7 (because I don't want pair it with UCKB1 modem, and suffer through rough voice quality). If KP1 is a keeper, my options just opened up.

For all those launch Captivate owners. There may be some hope after all.
[Captivate Android Development] shoman94:
Awesome! I take it it didn't matter what RoM you were on.
[Captivate Android Development] timn2bama:
I use KP1 seems to work well here in my area!

Phoenix Ultimate

SpeedMod K13c - 500

ZNKP1
[Captivate Android Development] rajendra82:
I am not on any ROM. It's a stock KB1 setup, rooted, and debloated by hand, which is probably closest to Cognition 4.x. Just replaced the kernel with Onix 2.0.2, and tried a bunch of non i897 modems. That being said, I might try to flash Continuum or Apex one of these days, just for the heck of it, so that I can use bluetooth headsets while not giving up on HSUPA, and move up to the 2.2.1 JS8 Framework. What I really want to move up to is CM7, but they are still working through some issues I want resolved first.
[Captivate Android Development] 1randomtask:
What is JVK like in terms of Call Quality and BT quality?
[Captivate Android Development] shoman94:
So far its good.... tomorrow will be my real test with both of those.
[Captivate Android Development] harpo1:
I barely get any signal in my house but call quality is great. Similar to JPG, JQ1, JS1 etc..... I'm liking it so far. Will test data tomorrow when I'm in an area with better signal strength.
[Captivate Android Development] garringm:
This on JVK -- It's more than likely a fluke, but in my area I have never seen speeds like that, gps seems to working fairly smooth too,

NVM
[Captivate Android Development] shoman94:
Has it been consistent? So far this modem is acting great. Data is working without issue at one bar and voice quality will be tested later on.... Very busy today.
[Captivate Android Development] garringm:
Like I said that for me was more than likely a fluke but yes when my phone was there I was getting high 3's to mid 4's. What I do like is I can get somewhat better signal in my 500,000 square foot tin box I call work. So far this morning here at work I lost data onced but still maintained a cell signal, I deactivated/activated and it came back which is a first as well. I have one spot about a mile long I lose signal with every modem but jpg on my way home. one thing I have notcied so far the data speed up and down is proportional to the signal quality, on many other modems my upload will still be around 1.3 even though my down is low around 256k but with this one if my down is low my up is low as well. Latency seems to be a bit high on jvk too

I have 3 and only 3 variables I base my opinions and selections on, This 1 mile stretch, my ability to use data and send text messages while at work, and my ability to use data at home and the occasional call I may make at home. (nobody calls me)
[Captivate Android Development] dave1977nj:
thank you for the updates!
[Captivate Android Development] H3llstorm:
Just got this on JS1, which gives me better voice quality than JVK (also note the low latency/ping).
[Captivate Android Development] sjavvaji:
This is just crazy...max I got in my house before was 3000kbps...just got 4092kbps but it went to 4500 kbps got a few seconds before coming back down
[Captivate Android Development] kennonk:
travelling

I am in Campbell/Cupertino, CA on business this week. Using modem jk4. At home in Central CA I normally get 2.5-3.2. It is a lot faster here.
[Captivate Android Development] ccdoggy:
Using JVK for the past day or so and results vary. It gets great reception everywhere, but looking like about 5% drain an hour for me. which is way too much. I did no speed tests as i dont really care about speed, and there is only edge out here.

going to give it the rest of the day and then tomorrow too just to make sure.

Why is it that non of these modems (other then jk4) seem to have battery in mind?
[Captivate Android Development] WickedNite:
Trying JVK today, let's see.
[Captivate Android Development] rizzo269:
I have the same results. I have flashed everything out there and always come back to JK4. I like JQ1 as well but it doesn't hold 850 as good for me.
[Captivate Android Development] garringm:
This is all specific to your phone, ROM, apps you run and many other variables. ME I prefer jpg so far because of the low signal call quality with comparable network connectivity, for battery life JQ1 has been by far the best for me. It has been the only modem I can go all day long without recharging, BUT I have never complained about battery life I use my phone hard my display is on and the phone is in my hand better than 50% of the day for one reason or the other, whether its dealing with my Day Job, My Equipment repair Shop, Members of my Bass Club, or Family I use my phone a lot. Have you tried JQ1 and given it a fair shake, at one point JK4 was the only modem I would trust until I actually forced myself to use them more than a couple hours here and there. I am still working with JVK gonna let it stand for a couple more days
[Captivate Android Development] .:Crack:.:
Using JVK modem on 2.2.1 JS8 since the day it was released.

Compared to JVE i think it has a worse battery life and a worse call quality.

Did anybody experience that too?
[Captivate Android Development] timn2bama:
I'm on js7 yes bad call quality.

Phoenix Ultimate

SpeedMod K13c - 500

ZNKP1