yashsingh1/xdaforums huggingface dataset:
[AT&T Samsung Galaxy S II SGH-I777] SoCaliTrojan:
I flashed the new modem to Serendipity 8.2. Download speeds seemed to increase from an average of 0.8 Mbps to around 2.0 Mbps. Upload speeds dropped from 1.10 Mbps to about 0.83 Mbps.

Call quality is the same as before (no issues).

I hope I flashed it right (I'm new to Android). I extracted the zip file, loaded Odin, put modem.bin in the "Phone" section, and clicked Start.

Also, don't mind the slow speeds. I went to an AT&T store 3 days ago to compare my phone. They had their phones connected to the at&t wifi and wouldn't let any phone do speed tests. I managed to find a phone that I could sneak a speed test on, and that phone went slower than my phone. Apparently my speeds are typical in the "confirmed 4g area" that I live in. This modem seems to help a little, especially since I spend more time downloading than uploading. ;-)
[AT&T Samsung Galaxy S II SGH-I777] tmckenn2:
i ran some tests with speakeasy speed test. these are the results. note i am using the modified apn(i would have done one with stock too but i couldn't find what it was and didn't want to flash back to an old rom just to get the apn.) the format is UP/Down and the stuff in () is over wifi. i took the best of 3 runs for each. and i live in the suburbs of chicago

ATT MODEM(H7)	4.75/1.75 ( 5.76/.87)

CUSTOM MODEM(J4)	2.73/.81	(5.75/.84)

the wifi didn't show any drop which may be expected but the Mobile network went down significantly
[AT&T Samsung Galaxy S II SGH-I777] antiochasylum:
Hmm, think these would work with the i9100?

Sent from my Insanity powered SGS2
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
What I learned from the captivate and modems is that some modems work better in areas and others work worse. That is why on the captivate I flashed MANH different modems until I found one that worked best for me and the area I was in on my phone. So whenever a new modem comes out it doesn't hurt to try it out. Also is why I put the stock modem in here also.

Sent From My KICKASS CM7 AT&T SGS2
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
I tried some i9100 modems and they didn't work on my phone. I got good data, good reception, but when I called my voicemail I had no sound even though the call went through. So I am not sure if they will work or if something needs to be changed for them to work.

Sent From My KICKASS CM7 AT&T SGS2
[AT&T Samsung Galaxy S II SGH-I777] tmckenn2:
Thanks for the kernels I hope to find a good one. One thing that helped data speeds was changing build prop value to ro.ril.enable.dtm=1

ro.ril.gprsclass=12

ro.ril.enable.3g.prefix=1

ro.ril.hsdpa.category=28

ro.ril.hsupa.category=9

ro.ril.hsxpa=3
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
I saw your post in the cm7 thread also and had a question for you there. Anyways was wondering if you added in a few of those ro.ril because mine didn't show them all.

Basically I had

ro.ril.hxspa=

ro.ril.gprsclass=10

So I was wondering if you added the others? What nightly are you on? I am on #12 so I was curious if something changed between nightlies or why I would not be showing the others. Thanks

Also what apn settings are you using?

Sent from My KickAss CM7 Captivate
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
I found this info from two linked threads here on xda that shows what these things mean:

ro.ril.hsxpa : inidcates hsxpa support of target network :

Code:

ro.ril.hsxpa=0 - UMTS r99

ro.ril.hsxpa=1 - HSDPA

ro.ril.hsxpa=2 - HSDPA/HSUPA

ro.ril.gprsclass : inidcates GPRS class of target network :

Code: Class 2 : 3 slots : 8 - 12 kbps upload / 16 - 24 kbps download

Class 4 : 4 slots : 8 - 12 kbps upload / 24 - 36 kbps download

Class 6 : 4 slots : 24 - 36 kbps upload / 24 - 36 kbps download

Class 8 : 5 slots : 8 - 12 kbps upload / 32 - 40 kbps download

Class 10 : 5 slots : 16 - 24 kbps upload / 32 - 48 kbps download

Class 12 : 5 slots : 32 - 48 kbps upload / 32 - 48 kbps download

ro.ril.hsdpa.category :

Code:

Cat 1 = 1.2 Mbit/s

Cat 2 = 1.2 Mbit/s

Cat 3 = 1.8 Mbit/s

Cat 4 = 1.8 Mbit/s

Cat 5 = 3.6 Mbit/s

Cat 6 = 3.6 Mbit/s

Cat 7 = 7.2 Mbit/s

Cat 8 = 7.2 Mbit/s

Cat 9 = 10.1 Mbit/s

Cat 10 = 14.0 Mbit/s

Cat 11 = 0.9 Mbit/s

Cat 12 = 1.8 Mbit/s

Cat 13 = 17.6 Mbit/s

Cat 14 = 21.1 Mbit/s

Cat 15 = 23.4 Mbit/s

Cat 16 = 27.9 Mbit/s

Cat 19 = 35.3 Mbit/s

Cat 20 = 42.2 Mbit/s

Cat 21 = 23.4 Mbit/s

Cat 22 = 27.9 Mbit/s

Cat 23 = 35.3 Mbit/s

Cat 24 = 42.2 Mbit/s

Cat 25 = 46.8 Mbit/s

ro.ril.hsupa.category :

Code: Cat 1 = 0.73 Mbit/s

Cat 2 = 1.46 Mbit/s

Cat 3 = 1.46 Mbit/s

Cat 4 = 2.93 Mbit/s

Cat 5 = 2.00 Mbit/s

Cat 6 = 5.76 Mbit/s

Cat 7 = 11.5 Mbit/s

ro.ril.enable.dtm=1: Boolean value when set to 1 allows ARFCN simultaneous transfer of Packet Switched (PS) and Circuit Switched (CS) data over the same radio channel

ro.ril.gprsclass=12: indicates the target 2G GPRS class of network.

Class 12 : 5 slots : 32 - 48 kbps upload / 32 -48 kbps download value to Class 10 : 5 slots : 16 - 24 kbps upload / 32 - 48 kbps download

ro.ril.hep=1: Not certain.

Suggested change to hep=0 if you have issues with HQ youtube videos over cellular data.

ro.enable.3g.prefix: Adds the 3G prefix to the operator name

ro.ril.hsdpa.category=14: Indicates the highest High-Speed Downlink Packet Access category.

Cat 8 = 7.2 Mbit/s

Cat 28 = 84.4 Mbit/s

Cat 14 = 21.1 Mbit/s

ro.ril.hsupa.category=7: Indicates the highest High Speed Uplink Packet Access category.

Cat 7 = 11.5 Mbit/s

ro.ril.hsxpa=5: Indicates HSXPA support of target network

0 = UMTS r99

1 = HSDPA

2 = HSDPA / HSUPA

5 = Not Certain.

Sent from My KickAss CM7 Captivate

Sent from My KickAss CM7 Captivate
[AT&T Samsung Galaxy S II SGH-I777] jaxf250:
Previous D/L was about 3.7-3.9 at my work, and upload did not change (still right about 1.0 mb up). So far looks like a good upgrade, but have not traveled too far out of my area to really test it out. I also just today put in those build.prop edits and have not seen any change in limited testing this morning... same speeds as without the entries. I am going to re-check my edits on the file....

---------- Post added at 09:58 AM ---------- Previous post was at 09:21 AM ----------

OK, I re-checked my edits to build.prop, and my earlier copy/paste had inserted a CR/LF at the end of each new line I had added, so I went in and deleted the extra "space" at the end of each line, and rebooted. Now I see d/l speeds of 6.7-6.99 and the same upload speed of about 1.0 mb.... I can live with this.... ;-) -- thanks to all who posted the RIL chnages!! ;)
[AT&T Samsung Galaxy S II SGH-I777] tmckenn2:
I answers part of your question on the other thread but the apn settings are in Tbs second post of the cm7 thread in the Q&A section. The idea behind the apn is that with the stock apn you are connecting to the old network designed to handle slower speeds. The new apn will connect you the the new "backend". Thanks for posting all of the meanings. Although the theoretical maximum is 21mbps it would seem the higher class gets us the higher speed... And I would kill for an actual 21mbps but it is physically impossible. wifi is the same way, it is impossible to reached the lab set numbers because of environmental variables... I think all these edits help but there will be a maximum that can only be changed by a change in hardware or conditions (i.e. Location) that's why this modem work is so interesting because it changed how the hardware acts, potentially yielding better results.
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
Thanks for the reply. I asked about the apns thinking that was what you were using. I had a weird situation that those apn's from the second post of CM7 actually slowed me down and I went back in and had reset default apn's and my speeds got better.

But last night I was testing out the settings you pointed out and kept messing with them until j was getting higher speeds. (My area seems to suck here in Buena park CA for download speeds usually about 2-3, yet with the same default apn's at my work I was getting 8 down consistantly). So after messing with the apn's from the second post in cm7 and the ro.ril's last night at home I was getting in the 4's so it is better for my area. I look forward to see if at work my 8 Downs will increase as well but so t be able to test them out until next week sometime since I am on medical leave due to appendix surgery. Again thanks for your input.

Sent From My KickAss ATT SGS2 SPORTING CM7
[AT&T Samsung Galaxy S II SGH-I777] switters1:
This is great. I've been looking for more modem choices for att gs2.

One of the biggest improvements I saw on my captivate was the jl2 modem which was significantly better than stock in speed, battery and reception.

So far I will stick with stock for gs2 but ill keep trying the new modems. Keep this thread going!
[AT&T Samsung Galaxy S II SGH-I777] Globalrebel:
Well, I am having a hell of a time with my phone speed. . .

I'm using . .

1st APN:

Name:HSPA+

APN: phone

MCC:310

MNC:410

APN Type:default,supl

save that.

2nd APN:

Name:Broadbrand

APN:broadbrand

MCC:310

MNC:410

APN Type:dun

save it.

3rd APN:

Name:ATT

APN:wap.cingular

Username:WAP@CINGULARGPRS.COM

MMSC:http://mmsc.cingular.com

Mms Port:80

MCC:310

MNC:410

APN Type:mms

And I don't get anything above 300 kb/s. This is using the stock modem. I made the changes to the Build-prop and still nothing.

I tested my speed with stock APN settings, and stock Modem and I was getting 1 - 2 Mbit/s download.

With the new modem, I am getting 300kbps download still. I tried the Build-Prop settings and nothing changed. Can anyone tell me what I'm doing wrong? I can't figure this out and I feel sad. LOL

On a side note, I had to add multiple lines to my "Build.prop" file since they were missing.

(Side Note : My upload speed is faster then my download speed?!?!?)
[AT&T Samsung Galaxy S II SGH-I777] tmckenn2:
tht certaintly is odd. both that its that low and that down is lower than up. are you in an urban area? and what time are you running these tests? both have to o with how much taffic is on the tower your connected to.

also RockRatt sorry to hear about the appendix, ive had a few friends have that happen and its scary, on the plus side now you dont have to worry about it. :) and heck maybe your data speeds will increase haha.
[AT&T Samsung Galaxy S II SGH-I777] Indecisive1:
So, flashed the modem, don't really see any differance. Still getting something retarded like 300 kbps at work right now. What are we supposed to set the apn at for this modem? Because cm7 defaults to something that stock does not.
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
Were you getting that low while on stock rom? That is WAY TOO LOW. If you were getting that in stock and also now then I would first suggest going into the apn's settings, hit the menu button, then RESET TO DEFAULT. Reboot and see if your speeds get better. If they do not then I would call att and let them know that your getting SUCH LOW speeds and to MAKE SURE your account is set up for the 4g account settings. If you still have issues let us know and maybe we can think about something else to try. Dang that is low speeds.

Sent From My KickAss ATT SGS2 SPORTING CM7
[AT&T Samsung Galaxy S II SGH-I777] Simba501:
Are modems compatible with the Infuse, compatible with the GS2? There are a host of modems over in their forums, one of which is KJ4.
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
Not sure. I will check some of them out and test later tonight if I can.

EDIT: I tried out every Infuse modem and none would work. They have different sizes for the modem.bin file, bit I am not sure if/how that would have an effect. I then tried out every i9000 modems, i9100 modems, i897 modems also. Some I was able to get a good data signal and speed but one I made a test call it would disconnect.

Sent from My KickAss CM7 Captivate
[AT&T Samsung Galaxy S II SGH-I777] Globalrebel:
I actually swapped back to the stock radio, and did some data speeds tests outside of my work area after I got off, and I got a consistent 3Mbit/sec download and about 1.4Mbit/sec upload. I think the tower at my work must be high on traffic. I'm going to try and change up the Build-Prop and test that out as well.

Lucky me, I have horrible speeds at work and horrible reception at home. Talk about not winning anywhere! I wanted to get that cell tower from ATT, but I figure they should give me one, not me have to BUY one for $200!!!

RockRatt . . . good luck on the surgery man! I'm sure you'll be fine. Drink an O'Doules for us after ;)
[AT&T Samsung Galaxy S II SGH-I777] CNLiberal:
I tried the new modem FW on the nightly 12 build of CM7.1. It did not work. I had gray signal bars the whole time. Currently flashing back to original. I wiped Dalvik before flashing both modems. I did change the build.prop under /system (saved the old one first) and I'm not sure if that made a difference. I am seeing "H" in the status bar more now than before.
[AT&T Samsung Galaxy S II SGH-I777] Globalrebel:
I can say that it worked for me. Be sure that you have the "Enable Data" turned on as it (for some odd reason) was turned off when I flashed to the new nightly yesterday. After turning that on it worked without any issues.

I believe this can be found under "Settings --> Wireless and Network Settings --> Mobile Networks --> Data Enabled"

Don't know why this happened, but switching this back on fixed that problem. The fact that you had bars still shows the modem worked (since it was getting reception) but the data was/may have been turned off.
[AT&T Samsung Galaxy S II SGH-I777] CNLiberal:
Weird, I just re-flashed the new modem FW and it seems to have stuck. I'll try some data tests later.
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
Sorry I think that was MY FAULT. While testing out many other modems last night I think I updated the wrong ones to the links. I have corrected them both and updated the OP.

Sent From My KickAss ATT SGS2 SPORTING CM7
[AT&T Samsung Galaxy S II SGH-I777] CNLiberal:
I had to flash back to the old modem. I was experiencing really bad "grip of death" when I was in landscape mode. Also pages were loading slow over my WiFi. I don't experience slow page loading on the old modem FW.
[AT&T Samsung Galaxy S II SGH-I777] dandrumheller:
I absolutely agree that AT&T should be giving out microcells to those of us with higher dollar accounts in areas where the coverage is poorer than advertised. That said, I got a refurb one from a local COR store for 50 bucks. Much easier to justify than the 200 price new. The sales guy said they had a bunch of refurb ones in stock.
[AT&T Samsung Galaxy S II SGH-I777] tmckenn2:
One other thing you might try adding to the build.prop is ro.ril.fast.dormancy.rule=1 I'm not sure on how it works but if you have trouble with data dropping out or being off when you unlock your phone this seemed to help. And I agree with the micro cells but sometimes its the building type your in, my school is made of lead or something I spend hours in no signal killing my battery and making me mad
[AT&T Samsung Galaxy S II SGH-I777] jaxf250:
Update: OK, so my new flash procedure for nightly's is like this:

- download new nightly ZIP (when there are enough changes that I want to update)

- reboot into recovery

- wipe cache and dalvik

- flash ROM

- reboot and verify the modem I want wasn't updated/changed by the flash (normally it isn't unless there is a major ROM release/change)

- copy my custom build.prop file w/ new RIL values into /system

- change my font back to the one I prefer

- reboot

I updated to nightly #17 last night and followed the steps above. Today I tested the data xfer with speakeasy. I got 7.9 down/0.7 up with Atlanta server, and 8.4 down/1.08 up with Chicago server. I am not missing LTE with these speeds, though I don't stream movies etc. for that to make a difference. If I drive 9 miles north from the office to home, my data speeds down drop to under 4 Mbps and never improve, even at low congestion times like 2:00AM. Towers and what area you are in make a huge difference in speed. This is with KJ4 modem.
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
Let me know how the i9100 modems work for voice calls. I tried MANY of them and got good speeds but no sound when making a call.

Sent from My KickAss CM7 Captivate
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
Pretty much the exact same I do after each nightly. I also use zip themed and add my custom theme back on. I also copy a colored version of the cm7 boot animation into system/media. Then once it is rebooted I am golden.

As far as the modems go I see the same kind of thing. When I am at home kj4 gives me speeds of about 4-5 while kh7 gives me a pretty steady 2.5.

At work I was getting about 8 on kh7 but I haven't been back to work for a few weeks so I can see if kj4 will give me better, same, or worse results than kh7.

Sent from My KickAss CM7 Captivate
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
Ya let me know. I had tried many if not all from the i9100, i9000 modems. Some would work with good speeds but no voice.

Sent from My KickAss CM7 Captivate
[AT&T Samsung Galaxy S II SGH-I777] CNLiberal:
Ever since I tried flashing a new modem, my wifi/modem connection seems to go gray quite a bit. I moved to the J modem, then back to UCKH7 modem and I'm still getting these gray bars. I changed my build.prop, but saved the original, so I might try that. I have to reboot the phone to get the gray bars to turn green. Anyone else seeing this?
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
Have you done any changes to your apn settings? I have seen that after making some changes to my apn settings.

Sent From My KickAss ATT SGS2 SPORTING CM7
[AT&T Samsung Galaxy S II SGH-I777] CNLiberal:
I tried to make changes, but I don't know how. I downloaded the APN Manager app but never figured it out. How can I check that I didn't mess something up? Currently, the ATT APN is:

APN: wap.cingular

proxy: (blank)

port: (blank)

user name: WAP@CINGULARGPRS.COM

password: (blank)

server: (blank)

MMSC: http://mmsc.cingular.com

MMC Port: 80

MCC: 310

MNC: 410

APN Type: default,supl,mms

Is that OK?
[AT&T Samsung Galaxy S II SGH-I777] jaxf250:
That is exactly what I have in my APN. Should be fine.
[AT&T Samsung Galaxy S II SGH-I777] tmckenn2:
i find that gps being enabled causes data to drop out. and give you gray bars.... kinda sucks and gets really annoying im trying to figure out whats happening but im no dev.
[AT&T Samsung Galaxy S II SGH-I777] tmckenn2:
Reverting my apn back to stock (go to the apn manager in ROM settings> menu> revert to stock) fixed ASL my greasy bar woes... Doesn't get around the grey bars in low coverage but that's a hardware problem
[AT&T Samsung Galaxy S II SGH-I777] jcr81:
Ever since I flashed the leaked modem in the op I can't connect to wifi anymore. It just connects and disconnects. I tried reflashing the stock modem and still can't connect. I believe that I am on nightly #14. I even tried power cycling my router. Anyone have any ideas?
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
Have you changed your apn settings also? I have seen that while messing with my apn settings, specifically when I tried to send an mms my signal would cut out and back in and the mms would not send. Text would go through with no issues.

I have been using the kj4 modem since I posted it and for me and/ or my area it seems to work better. What I learned from modems on the captivate was that what works good for one person in one area does not always work for another in a different area.

Also once you flash back to the stock modem make sure to wipe dalvich cache. It can have an effect.

Sent From My KickAss ATT SGS2 SPORTING CM7
[AT&T Samsung Galaxy S II SGH-I777] jcr81:
I have not changed Apn settings.
[AT&T Samsung Galaxy S II SGH-I777] SSJ_Gomike:
Same problem I've had....

Sent from my Galaxy S II - I777
[AT&T Samsung Galaxy S II SGH-I777] tmckenn2:
Stock apn serums will fix everything. Set it to stock
[AT&T Samsung Galaxy S II SGH-I777] CNLiberal:
I was having severe problems with the modem yesterday. I was in a hotel and joined the hotel network, yet I had gray bars the whole time. It was very frustrating. Reboots didn't help. This morning, I cleared Dalvik cache and I still have green bars. Hopefully, that was the fix I should have done the first time. I'm never changing modems again. Seems too iffy especially when I rely on my phone.
[AT&T Samsung Galaxy S II SGH-I777] moustro:
I am having issues flashing the UCKJ4 MODEM. I have tried to flash through cwm and I get an error saying that process was aborted. I tried using odin and it said it passed but in my about screen I still have the UCKH7 modem. Any help would be great.

I am running checkrom revolution 3.1.1
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
These are cwm flashable for CM7, you may need to find a cwm compatible modem for your rom. You can look through the GENERAL or DEV SECTION as I do not remember where exactly I saw it but there is a Odin flashable modem in there. Possibly in one of DGs post also.

Sent From My KickAss ATT SGS2 SPORTING CM7
[AT&T Samsung Galaxy S II SGH-I777] melbourne408:
This was with KJ4 today, too clean imho hahaha
[AT&T Samsung Galaxy S II SGH-I777] drawde40599:
leaked modem

Been using updated modem for 8 says no issues at all flashed just fine!! Cm7 nightly 20
[AT&T Samsung Galaxy S II SGH-I777] melbourne408:
RockRatt you have done it again

and again

still getting my speeds better through two CM7 devices now!
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
NO WAY!!! I would love to see those kind of number. Where were you at that got that great of a signal? I think the highest I have ever seen was in the 10's.

Sent from My KickAss CM7 Captivate
[AT&T Samsung Galaxy S II SGH-I777] melbourne408:
Over at college, funny tho I was surprised at the speeds myself, nightlys download like butter haha

Sent from my Snappy CyanogenMod7 SGS2
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
was that on wifi at your school?

Sent from My KickAss CM7 Captivate Running ICS
[AT&T Samsung Galaxy S II SGH-I777] melbourne408:
Nah just mobile, I'll be back there tomorrow and post those up when I get there, should be epic!

Seems like libraries and colleges, without their blazing wifi-my school does need a low balancer. My homie easily pulled up BT off his notbook, airmon-ng the network and killed the connection for a good couple hours and left my mac address and channel alone hahaha.
[AT&T Samsung Galaxy S II SGH-I777] Globalrebel:
I wish I could even get 6Mbit/s, I mainly stay around 1 - 2 Mbit/s down.

Located in Mission Viejo,CA :(
[AT&T Samsung Galaxy S II SGH-I777] Rolex81:
THANK YOU for having these modems up. I accidentally flashed a wrong ROM earlier today and it changed my modem and i lost in call sound. Just flashed your Stock Modem in CWM and all is well again.
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
I am also in Orange County and in Newport/Irvine area I get from 6-8Mbs and at home in Buena Park I get 4+/-Mbs. Try changing or resetting the apns to stock with the jk4 modem and see if it gets better for you. If it does then shoot me a pm and I will show you what apns I set and have been working for me. With the CM7 settings from the OP it worked great but mms didn't work, so I played with my APN setting until mms worked and I kept better speeds.

Glad it worked out for you. That is one reason I posted them up. Plus when I was on my captivate I would try all the new modems until I found what worked best for me and my area.

Sent From My KickAss ATT SGS2 SPORTING CM7
[AT&T Samsung Galaxy S II SGH-I777] DaUnderSheriff:
????

Could you post the APN's that your using? I've tried several different variations, but don't like the dismal speeds I'm seeing. I'd appreciate it. Thanks for posting the modems!
[AT&T Samsung Galaxy S II SGH-I777] RockRatt:
The first pic is the names I used for the two APN numbers. The 2nd and 3rd are of the hspa+ settings, the 4th and 5th are of the mms APN. Hope this helps

Sent From My KickAss ATT SGS2 SPORTING CM7