yashsingh1/xdaforums huggingface dataset:
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] ddochi11:
I have the exact same issue. If I go into Phone info in the settings, Baseband is blank.

Do I need to flash a T-Mo rom?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] bjermane1:
Ive recently unlocked my skyrocket and purchased a T-Mobile sim. I'm using dirty unicorn and I'm also on the skyrocket radio with little to no issues.

Where I stay in Louisville I only get about 2bars of LTE and get around 5.5 down.

Going to try a Hercules radio and ROM tonight to see if there's any difference.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] SGS2X:
I just switched back to Mobilicity from Wind a few days ago and I'm quite upset with signal :( I got my other mobilicity phone right beside me and my Skyrocket barely retains signal and is usually at -111, 1 asu whereas my other phone is in the -80s with at least 12 asu at the same spot :/ Tried all 3 radios and they have no effect. Worst part is the texts keep failing, thats the one thing I need most

I feel so frustrated right now... why didn't I just stick with the Big 3 :( been flipping back and forth between Wind and Mobilicity for the past 4 months and each time the signal gets worse. The worst part is that the phone has more of a part in the bad signal than Mobilicity because phones they sell work fine, but mine keeps flipping between no service and 0-1 bars -.- I've wasted more money in the past 4 months than I would have spent with Bell/Telus/Rogers and I've had bad experience this whole time. Why is this such a **** antenna in our phones? it's not just the Skyrocket but the Hercules too... First with mobilicity i was getting mediocre service, switched to Wind and had slightly worse service, switch back to Mobilicity and I have NO service most of the time, wtf man

I see theres 2 external antenna ports at the back of the phone... can anything be done with those to boost signal?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] sigsegv0x0B:
Actually yesterday I compared a skyrocket with a galaxy nexus on wind. Results are very strange both phones were showing full signal but the network performance was pretty terrible with the GN doing a little better then skyrocket. But not by much. Skyrocket was getting 30-40Kb/sec and 5-10Kb/sec up. (that's Kilobytes not kilobits) and the GN was doin about 60Kb/sec down and 15Kb/sec up. Not a huge difference. No idea a SGH-T989 would have done.

But all of these phones have wildedly different radio implementations. The GN is different entirely while the T989 and I727 use same modem chip their radios are totally different. And their performance will be very different on any network.

There is a actually a really good tear down on the SGH-I727 on the internet if you search for it. It gives you a very good overview of the I727 radio layout. And it's rather complex. The SGH-T989 supposedly has a single SKY77604 power amp that supports AWS. The I727 has a weird layout with a SKY77606 handing the quad band WCDMA and then it has 3 more ampilifers (ACPM-5004 UMTS 1700MHz) (ACPM-5017 698-716 MHz) (ACPM-5202 1850-1910MHz) Not sure why the ACPM-5202 is there because I think the SKY77606 supports this band. So if this information is correct the I727 has tons more of radio hardware then the SGH-T989 even though the actual modem is the same. This might mean that the I727 won't be able to match the battery life of the T989 due to having so many more power amplifiers.

If someone can find a very good tear down for SGH-T989 it would be nice because my info for T989 comes from someone who opened it up but never punished a proper tear down.

Galaxy Nexus has also lots of excellent teardowns published and it has an single pentaband RF6260 power amp handing all the bands.

So from the current phones the Skyrocket has by the far the strangest and most complex radio layout with at least 4 power amplifiers in it's radio where the other phones usually have only 1.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] :
I saw only this http://xdaforums.com/showthread.php?t=1454537
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] SGS2X:
Do you know if there is any way to tweak the amount of power that these amps deliver to the radio? Maybe the kernel controls that? I don't mind sacrificing battery life if it means I can actually use my phone to text/talk at home
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] sigsegv0x0B:
I wouldn't imagine any phone user level control over these amplifiers it's likely fully automatic and done by the modem. It would be great to have some RF engineer to answer this. The IC docs do mention that the amplifiers have power control levels and likely the modem does manage them. There is a good chance that to work on AWS the Skyrocket must keep at least 2 amps going one for the 1700mhz (ACPM-5004) uplink and one for 2110mhz downlink on the (SKY77606).

Tying to browse the specs for these amps this functionality seems to be split across different chips on the skyrocket. While in the SGH-T989 it's all on the SKY77604.

And on top of all this is the fact that these IC's actually have multiple power amplifiers inside them. There is likely at least 2 amps inside SKY77606 some for rx and some for tx.

So my guess would be skyrocket simply has no choice but to run at least 3 AMPs when operating on AWS. The two in the SKY77606 and 1 in the ACPM-5004 for uplink. On the hand maybe the power-management in the SKY77606 will turn off the uplink amp if it's not being used.

In the end this all wild conjecture it would be up to someone who really has good experience with this and understanding of these chips to explain how it all works in the skyrocket.

---------- Post added at 04:44 PM ---------- Previous post was at 04:39 PM ----------

Another guess I would put is that the T-Mobile modem firmware when running on the Skyrocket simply is unable to properly manage the Skyrockets AWS Uplink amp so it's running with some defaults that are maybe not optimal. Perhaps isn't outputting the power needed and T-Mobile modem firmware might simply not know how to change power level on the Avago amp.

---------- Post added at 05:03 PM ---------- Previous post was at 04:44 PM ----------

It seems that a few sites list the "Docomo SC-03D Samsung Galaxy S II LTE" with 1700mhz support. Chances are this is basically a Skyrocket (of course without a proper tear down we won't know). But if they do support 1700mhz there is a good chance we can get proper AWS support with their modem firmware. So if someone has radio from this phone to flash and try that would be interesting.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] SGS2X:
That might as well be true because the T-Mobile modem wouldn't really know how to properly control the amps in the Skyrocket radio... as for battery, I haven't seen ANY difference in battery between my Skyrocket and old Hercules. With my latest rom (Paradox), my battery was still at 32% at 2:00 AM after taking it off charge at 6:00 AM the day before (and it was at 93% when I took it off) so battery life is great. I'm not running LTE tho so that may be why

Also, the 1700 is probably listed under LTE & not HSPA for those devices
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Talderon:
Ok, been reading through this post and still have a couple questions.

In order to get this to work, do I have to use a SG2 T-Mobile ROM and one of the radios in the OP, or can I use a custom Skyrocket ROM and one of these radios?

Trying to find out how to make a good combo to get this working.

Thanks!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jose makalolot:
You can use any hercules roms or some skyrocket roms and hercules radio/modem.

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[AT&T Samsung Galaxy S II Skyrocket SGH-I727] tomin.fhl:
Wonder it this is what is preventing consistent user experiences with the AT&T Galaxy Note to T-Mobile mod.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] sigsegv0x0B:
http://www.bell.ca/Mobility/Products/Samsung_Galaxy_Note/Specifications.tab

This seems to be it. If anyone can get the modem firmware from this phone and try it on a skyrocket. I know in ATT Note forums people have put skyrocket modems onto the note. It would be interesting to try Bell's GNote modem on skyrocket.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] :
sigsegv0x0B

I'm not sure if it's proper or not, but found one more teardown for t989 :)

Please have a look

http://www.ifixit.com/Guide/Disassembling-Samsung-Galaxy-s-2-T-mobile-T989-Phone/8179/1
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] sigsegv0x0B:
Doesn't list the ICs. Pictures are blurry and doesn't take off the RF shields off the modules. We need a much better one like the one ifixit normally does.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] iNeedICS:
Which Radio is the best??

As it says in the title so which ones faster?

and lets say i flash juggernaut with the conversion pack wouldnt i get the jugg radio?? pardon the noob question

also if i flash the tmobile rom with the conversion package is my phone gonna boot up with tmobiles logo ( i would really love that! im a tmobile guy im just getting the skyrocket for future tmo lte for next year;)
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] unlockingsky:
I am using [ROM] MHX-SUPERLITE-3.0 Stable

But my phone still shows I am using baseband UCLA3 after flashing it.

So any roms does not work and i am still trying to figure out what the :mad: went wrong...
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jose makalolot:
Also tried other UCLA3 roms and the modem sticks to that also. Also tried asking both in Q and A and Devs sections, but no one knows.

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[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Razor1973:
I have NexusMod 4 ROM and faux's kernel 5.0 and no matter what radio I install, I can't seem to overwrite UCLA3. I have tried both T-Mobile radios here, also AT&T's official I727ATTKJ2, I727ATTKJ7 and I727ATTKK1 as well as Da_G's radio from here and nothing. The flashing from recovery goes smooth and when I reboot, I still have UCLA3.

Is anybody else experiencing this problem? I tried with the MHX-SUPERLITE ROM (also UCLA3) with the same results.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] smully1:
It is a problem with ucla. You need to flash to a nom-ucla rom and then change modems. Then you can reflash the rom but not the ucla modem.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Razor1973:
You have been thanked, sir. Right after I posted last night, I decided to give Juggernaut 5.0 a try with the VKL1 modem and was on HSPA+ in no time! I did like NexusMod 4, but don't know how I could flash that ROM via CWM without flashing the radio. Unless there's an Odin version somewhere?

EDIT: By the way, which of those modems I mentioned above would you recommend? Based on the date in which these were posted, is it safe to assume that the ones in this thread are newer and better than the one posted by Da_G back in December? My speeds were very high (10 MBps) last night, but barely reach 1 MBps today with the VLK1 modem. I may try another one. And is that Telus modem going to get me connected to T-Mobile's HSPA+???
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jose makalolot:
So far VLK1 worked for me when I was still on Simple Mobile. i get 5mbps+.

If you want to try, I repack a rom with my mix based on UKK1. So far, worked great for me. :)

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[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Razor1973:
Actually, I had no voice with VKL1, either incoming or outgoing. Using Da_G's radio, I had voice, but only EDGE. The KID radio just wouldn't flash and I tried re-downloading and repacking it. Lastly, I tried the Telus radio and everything seems perfect. Funny... the Telus radio gets me the best results on T-Mobile when installed on an AT&T phone. hahaha
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] railinandnailin:
Do i need unlocked?

So if i have the phone rooted but locked on AT&T can i just install custom rom for T989 and it will work on tmobile SIM?

Im thinking of using Slimbean 4.3.1. Will this work with TMobile?

I had t989 but it broke and Skyrocket was cheaper, I'm hoping to join the community soon.

Thanks in advanced!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] xcrazydx:
No
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] sonuxda:
I am on CM 10.2 release with UCMC1 in LA area and getting LTE logo. My downloads are 15 to 20 Mbps and uploads from 0.5 to 8Mbps. Everything is great BUT I can't get MMS to work. I tried all the various APN settings from other posts and tried another messaging app to put in MMS settings. I can't get it working. Any help would be appreciated.

I posted this under QA and got no responses. Please help...
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] hitruput:
I brought my htc vivid to the nearest Metro store and...

When the unknown sim card was inserted and powered on, it immediately asked for the sim unlock pin number? Well, I nor the gent behind the counter had this information. And, a phone call to support he made yielded not positive results either. After a reboot, it no longer asked for the sim pin? Has anyone ran into this?

I did see something about a samsung tmobile sim sim-unlock.net (pasted below my last comment), but...that is not my case?

Backing up just a year or so, I would like to thank everyone here for the obvious. This is truly a great resource and hopefully you will all be here for a long time:)

Hitruput

How to enter code in Samsung Metro Pcs ?How to enter code in Samsung Metro Pcs ?

Unlock code You can enter in three different ways:

1. Insert foreign (Unaccepted) Sim card

2. The phone should ask for unlock code

3. Enter Unfreeze or Defreeze code

4. Enter NCK or Network code

The phone is now unlocked

If your phone does not ask for the unlock code:

1. Turn on the phone with original Sim card or without Sim card

2. Enter #7465625*638*NCK/Network#

The phone is now unlocked.

If your phone does not ask for the unlock code:

1. Turn on the phone with a foreign (Unaccepted) Sim card

2. Then enter the following sequence:

#0199*Unfreeze/Defreeze#

#0111*NCK/Network#

#0121*SCK/Subprovider#

#0133*SPCK/Provider#

The phone is now unlocked.

Unlock code You can enter in three different ways:

1. Insert foreign (Unaccepted) Sim card

2. The phone should ask for unlock code

3. Enter Unfreeze or Defreeze code

4. Enter NCK or Network code

The phone is now unlocked

If your phone does not ask for the unlock code:

1. Turn on the phone with original Sim card or without Sim card

2. Enter #7465625*638*NCK/Network#

The phone is now unlocked.

If your phone does not ask for the unlock code:

1. Turn on the phone with a foreign (Unaccepted) Sim card

2. Then enter the following sequence:

#0199*Unfreeze/Defreeze#

#0111*NCK/Network#

#0121*SCK/Subprovider#

#0133*SPCK/Provider#

The phone is now unlocked. topefully you all remain here in our free world. Have a great night!

Hitruput
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] spirodave:
Flashing skyrocket on tmobile t989 to get LTE

I have tmobile t989 and i have unlocked it and using it on att. I am planning onflasking the skyrocket radio to try to take advantage of the LTE bands on this phone. My question is has anyone got this to work . I guess im gonna try it tonight . Just looking for any pointers
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] TheCybertronian:
Won't work you lack the physical radios for lte.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] spirodave:
Tmobile t989 has late radio

The t989 does have let radios. A lot of people do not know this. I believe they are in the phone because of the possible merger of tmobile and att at the time of the phones release. If you type*#2263# in the dealer it show let bands. Please do a search. Just type in "T-Mobile galaxy s2 has late bands and you will see that I'm right. This is a penta band phone. After doing your search any tips for me will help
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] TheCybertronian:
Did you really tell me to do my homework... Do what you want but it WON'T work. If you really think you're going to be the one to make it happen over every other person around I applaud your skill. Your mobo lacks the ability. It's close but not exactly the same.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] spirodave:
sorry I didn't mean to come off that way. Actually you are the one that can actually explain why the Hercules shows let bands and why it won't ever work. This has just bugged me for a long time since seeing the late bands in my phone. Sorry I wasn't trying to talk down on you like don't know what you are talking about.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] TheCybertronian:
You're using a shared device tree which may be part of it if you're on an aosp system. You're phone was built without lte capability tmo had no use for it at the time and the 989 came before the skyrocket we got a slightly updated soc to support them as well as amps and antennae.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Dukenukemx:
Anyone have working links for these radios? They don't seem to work for me.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] nabbasi:
radio

Hi guys I have tried this radio t769-UVMb1 on wind mobile and it works.

; https:/ / mega.co.nz/#!CAV2jYQZ!ZcoR7i1T4pT3hbBZdCKgM4htWhxUR9Q1-oJf3Y_ZKOY
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] seezee:
radios

working radio dlz

en.sourceforge.jp/projects/sfnet_tmoicsmodems/releases/
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jjzeng:
the file does not exist anymore, any one help?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vincom:
most radio links are in the 1stop, link in my sig
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jjzeng:
thank you. :)
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Administr4tor:
please can someone tell me how to enable 1700/2100mhz tmobile frequency on n7000 phone? this phone supports GSM: 850, 900, 1800, 1900 MHz UMTS: 850, 900, 1900, 2100 MHz

Thank you
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Fatty1212:
Not possible
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] badbob001:
I just flashed my AT&T Skyrocket (i727) to cm11. Are any of the radios compatible with cm11 for t-mobile access?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vincom:
http://xdaforums.com/showthread.php?t=1785999
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vigorito:
What rom are you using?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jose makalolot:
He said Juggernaut on his previous post.

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[AT&T Samsung Galaxy S II Skyrocket SGH-I727] LKMR.PREZ:
Sorry for the noob questions but what is the difference between VLK1 and VK1? Also are you guys downloading the Tmobile s2 juggernaut ROM and flashing fauxs kernel? lastly, I went on the website and it says no file are found, can someone post again? thanks! And sorry

If someone could just re post the modems I would be greatly thankful
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Razor1973:
Indeed. *filler*
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Razor1973:
Has anyone tried the "official" ICS that just leaked and one of these radios? If so, please report your findings, whether you failed or succeeded to get 4G on T-Mobile and which of the radios you installed.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] LKMR.PREZ:
Can someone PLEASE tell me where to find the radios at!? Lol
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Razor1973:
Please tell us you're joking. They're right there in the first post. You saw them the second you opened this thread.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] KillerTacoPaco:
ICS Leak confirmed running fine on my Skyrocket using the telus modem
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Razor1973:
I'm still trying to flash the ROM and will then try the Telus radio, which is the same one I have installed today with the Juggernaut ROM.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] KillerTacoPaco:
The ICS leak kept dropping the connection with the telus modem so i switched over to the VKL1 and All was fine for about an hour untill it stopped reading the sim card. I tried flashing all of the modems and tried messing with the settings but it never picked up my sim card again.

Now, I'm back to JUG/Fau10/VKL1.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] gqkevyn:
After flashing the leaked ICS I have only been able to get edge. After I flashed Telus, VK1, and KID the phone would keep saying there was no SIM in the phone. I did noticed that in the "About phone" section the baseband only read "unknown"
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Razor1973:
I had a similar experience. I am now attempting to go back to my previous setup, but my nandroid backup is corrupted. I'm going to have to start all over again. Fun times. :|
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] LKMR.PREZ:
Actually I'm not joking, if I could download them I would have no problem now would I? But the fact that they are vividly in the first post, yet I'm asking that question, should hint that obviously I can't download them. Hence the reason I'm asking where you are downloading from. When I click on one, it takes me to a website saying the files don't exist, so again I ask; where are you guys getting the files from. Thank you.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] KillerTacoPaco:
https://www.google.com/webhp?source...sb&fp=49e91e21499bfe9d&ion=1&biw=1366&bih=705
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] saniyal:
hey it shows that i have no sim as soon as i flash back to the att modem on gb

how can i fix this
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Razor1973:
Then I suggest you use a different browser. I just tried all 4 downloads in the original post (links that haven't been changed) and they all worked; each one of them.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] :
Clear dalvik and cache reflash modem only let me know if that helps you
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] nuwan32:
btw the VK1 shows up as "VKL1" in status.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] LKMR.PREZ:
Thanks for the clarification
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] KillerTacoPaco:
I give up n this phone and I'm putting it on craigslist! ive tried every combination of ROM/KERNEL/MODEM and never manage to get anything over half a MB down.

Tmobile's 4g sucks in my city :(

im about 23 miles outside of downtown los angeles in norwalk,ca
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] xcrazydx:
Cool, have fun!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] tradeware:
Would this process be applicable to sgs2 9100?

If so help would be appreciated or even a pm how to....
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jose makalolot:
No.

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[AT&T Samsung Galaxy S II Skyrocket SGH-I727] .dan:
did you try rebooting? i had the same issue the first time around, around 500 kbps down, then i used rom manager to backup rom and after the reboot, it was at 2-3 mbps down, which is normal for my area for tmobile.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] .dan:
hey guys,

i am a tmobile subscriber and i need tmobile wifi calling to work, therefore i want to use a tmobile rom.

now with a tmobile rom on the skyrocket, am i better off with tmobile kernel or skyrocket kernel?

also, just to confirm, using an att modem / radio will not enable me to get 3g on tmobile network, correct?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] tspx23:
You can't use a t-mobile kernel on an ATT device, you'll have messed up rotation
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] YoshiNurijumi:
I would use Juggernaut. and you wont be getting 3g using the ATT radio. Your best bet is to flash the radio to UVKL1 or even KID
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jeweladdict:
Skyrocketing on Tmobile :D

Using Juggernaut + Faux + VK1 modem. Getting 10Mbps+ pretty much everywhere. I always see the H, or E, never see just 3G. Is this correct?

Also, battery sucks :( and phone heats up like crazy. Any fixes for these?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] VGMStudios:
Can someone upload the modems please. The ones that are on minus are not there any more.

Thx
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] xcrazydx:
Get them from the t989 forum