yashsingh1/xdaforums huggingface dataset:
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] b0nedaddy2360:
You need to flash the right ROM/radio man...read the OP...

---------- Post added at 11:05 AM ---------- Previous post was at 10:58 AM ----------

Well the good news is the method can be used on our phones! I don't know what modems work I know two that don't. I was able to use the T989 modem (Tmo_SGH-T989_UVLE1_radio.zip)to unlock my phone but others have reported UCLD2 (a skyrocket modem) works as well. after I unlocked I switched back to UCLI3 and the phone is still unlocked.

You'll need to be on a stock(or stock based) rom and you should make sure the number matches the text next to it.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] cooldude89:
what to do?

sorry I am new to this can you plz show me the link of what I need to exactly. How do I flash the ROM/radio, is there a tutorial via videos where I can learn to do that?

thanks for ur help.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] b0nedaddy2360:
You should start by reading the stickies in the forum for the skyrocket. Lots of useful info there. Step by step directions to take an already great phone and make it badass. These guys know their stuff, you just have to look in the right places. I can't post links yet, but it's not hard to find. Att>skyrocket>development>stickies...good luck man.

---------- Post added at 11:20 AM ---------- Previous post was at 11:15 AM ----------

You can PM me if you need help with anything man, I'll do my best to help you out.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] cschmitt:
The file extension doesn't matter, call it what you want.

Yes, backed up, unlocked, verified unlocked, restored mmcblk0p18 and mmcblk0p19, reboot, verified that it's locked again. Also, works with subsidy unlock code too.

From booted system or recovered, it doesn't make any difference.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] cnewsgrp:
I never got this message. However after reboot I am no longer presented with message "Please enter network key". Also I get message "SIM not provisioned". This is most likely because I am using non provisioned TMO SIM to unlock.

Am I unlocked?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] cschmitt:
Yes
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Datron:
Is this the only way to test if the unlock was successful: insert sim from another carrier?

Unclefest v2 alive and kicking - support SeanZ!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mahanddeem:
Cschmitt does anything (like flashing stock roms, flashing newer radio, flashing using Odin.....etc etc) change anything in the efs and related partition or not ? i.e. are these partitions "immune" or not to any factors (apart from corruption) ?

So are my partitions exactly like when I first unboxed my skyrocket 7 months ago from its AT&T new box or they changed in some way ?

By the way, my efs first was a usual 15 digits followed by /5 now with each newer radio it advances by 1 ...now my efs is followed by /8 instead of /5...
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] cschmitt:
Last digit is called IMEI SV (software version) and is tied to the version of radio/modem currently flashed to the device.

Of course the partitions change over time.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mahanddeem:
What exactly changes in those partitions ?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] kinhung:
thanks， just unlock my i727 with t-mobile sim card。
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] promiseofcake:
Unlocked using this method. Purchased Vodafone Prepaid sim. Dialed in to activate. Received free data amongst other things after loading 10 GBP, now voice calls do not make any sound. Any thoughts? Not even the number used to activate makes any sound. (2345)

Edit:

Flashed Rogers radio RUXLF3, works fine. Not messing with Network mode anymore. Seemed that before it worked for like 30 seconds and then died. All I did was choose an APN.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jcjcc:
It works! Thanks :D
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mahanddeem:
Any issues or problems or surprises during or after the process?

What radio you're using with T-Mobile and what data speeds you're getting?

Thanks
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] kendedel:
used the links in post #2 and it worked in my 1727r!!!! Thank you!!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] qtouch:
I have tried but is not working for me I don't know that it may be because I'm on Gingerbread but I don't get the 6th step :Press [6] NETWORK LOCK
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] hechoen:
This:
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] droidbabyxda:
reading and comprehending is a good start
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
If I did not get this after 'Press [4] NW LOCK NV DATA INITIALLIZ', would it be safe to assume it didn't work? If not, would it be safe to try the process again? Is there a limit to how many times I can try before my phone gets permanently locked?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] droidbabyxda:
did you flash both files?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
Yes, I flashed both the UCLD2 leak and radio before trying the unlock. I had an ATT Sim in there, but I read it should still work. But, I don't have a T-Mobile sim w/ me at the moment to try it out.

Update: I went to a store and it looks like it worked! No data, but I'm guessing that's because the APN is not configured. Will look for that and the other info (like radios) I need in the other threads. Big thanks to lart2150.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] lart2150:
I'm glad it worked for you. I only tested a method posted elsewhere on our phone thank owl74 he found the "bug".
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mr_magoo:
MMI

When I type the code I receive this:

Connection problem or invalid MMI code

Any suggestions?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mahanddeem:
Are you sure you're on stock UCLD2 rom ? because this error message shows up when the system doesn't recognize the code...
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mr_magoo:
Yes I am. I was looking it up, I'm trying with my ATT sim. Others said it worked with there ATT sim but from what I'm reading it appears I need to use another sim. I don't have one.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mahanddeem:
Other than the correct rom and correct radio , the code should work..And it's not a requirement to use a non att SIM...It's just "useful" to check for sure that you're unlocked after finishing the process...
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mr_magoo:
I will try and reflash the radio.. Thanks

Edit:

Well it appears to have worked I will have to find another sim and check it!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Datron:
Would a sim from another ar&t plan confirm if the unlock worked? Or should I go get a tracphone sim?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] hechoen:
No. It's gotta be from a different carrier. Just borrow someones TMOB sim.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] nhs510:
Worked great, first try. I put the TMO sim in before starting the process. Thanks!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jkq:
It worked, but I never saw the "PERSO_NV_INIT is SUCCESSFUL" message (or it flashed past way too quickly).

Thanks!

Sent from my GT-N7000
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
Same for me. You just gotta believe!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jkq:
Believe, then reboot. :)

Sent from my GT-N7000
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Lemondief:
Works Great

Thanks it works great for my Skyrocket from South America, there's not to many people who dedicate to unblock this phone in here being ATT exclusive.

:)
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] fly32:
Works on Rogers as per OP...
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vbrookie:
Thanks!

This saved me from big headache. I knew I had to unlock my phone before I left, but I simply did not had enough time. I can now use Claro SIM without any issue.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] promiseofcake:
Worked perfectly in Europe with Vodafone SIM.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] JonathanKing:
Should i flash the rom then the modem?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] lart2150:
if you are on a ics modem already the order does not matter but you might as well flash the modem first.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] JonathanKing:
Well, i still have the stock ICS rom from AT&T, but the modem that i have is UCLF6, even if i just flash th modem, will it work?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] droidbabyxda:
Flash both files. It will save you a lot of grief. Trust me.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] JonathanKing:
Well, this method worked on my skyrocket
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vbrookie:
I flashed both files as well. Just download both files and flash rom then antenna. Booted up and followed instruction. Everything went smoothly. Using my sky on international sim.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] cowabunga:
Just want to also confirm this worked for me. I followed the instructions from cschmitt...

Just perform a nandroid backup of the current setup, flash an appropriate ROM and modem, factory reset, reboot, perform the network unlock, reboot, verify it's success with a non-accepted SIM, then restore the nandroid backup and re-flash the previous modem.

On the first attempt after flashing the "appropriate ROM and modem", I forgot to factory reset. So the phone booted up to an android logo and stayed there. Every few mins it would just vibrate and buzz but remained in that logo. So I pulled the battery, booted back into recovery (vol up + vol down + power) and did a factory reset followed by a reboot. This time the phone booted to stock and I was able to then enter the hidden menu per instructions and do the unlock.

I also did not see any confirmation of unlock but went ahead and rebooted and tested with a Tmo sim. Phone was unlocked.

I then put CM10 back on the phone from my nandroid and confirmed Tmo sim still working.

Thanks to all those involved in figuring out this sim unlock method. This is absolutely fantastic. What a way to start my 2013. :laugh:
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] serranom:
Just wanted to also thank and let people know that it worked. Many thanks.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vbrookie:
If this isn't a sticky material I don't know what is.

I knew I could count on folks here at xda when I needed them.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] awerni:
I am having trouble unlocking my phone. I followed the instructions precisely and accuratly the first time around and it worked. I tried flashing another rom and for some reason I kept getting No Sim inserted. I tried to reflash stock and modem to unlock, and it worked again, but then I would reboot and my phone would display the No Sim inserted message again. And now, I reflashed stock and modem, and it doesn't want to detect the Sim anymore! The sim is brand new, and sometimes after some reboots it will detect it, but then it won't. Did I do something wrong?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] serranom:
Did you reflash the newest radio. You maybe on the radio to unlock.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] colinjlyon:
This is a very distinct possibility. Some roms have the radio in the zip, and others do not. I am running Embryo 6.0 and the radio is included in the zip, but when I flashed slim bean there was no radio in it so the rom simply interfaced with the uclf6 that I had installed prior to flashing.

Try flashing a radio then clear cache and reboot. ;)

Sent from my skyrocket on Embryo
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] lingowistico:
This is great news for Skyrocket!

I unlocked my SGH-i727r with cellunlocker for $7 but still, this should be added to all noob guides and stickied!

Free unlock should be a human right!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] lart2150:
What rom/baseband are you running? What phone do you have (att, rogers?)?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] pratyush795:
Thanks guys!

I'd like to thank everybody involved in this exploit. Now I can use my phone the way I want to! This really means a lot to me guys, thanks A LOT. :good:
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] colinjlyon:
I have a question regarding lock status. I bricked my last phone (infuse) trying to root it using Odin running in parallels on my imac. Apparently I bricked it so bad that even Samsung couldn't figure out what was wrong with it so they sent me a skyrocket for a replacement. Now here I am with my skyrocket sent from Samsung. Now it came with a rogers back plate but when I switched from rogets to Fido the sum went in and everything worked. I tried putting my friends Telus sim card in and everything worked fine too. This world indicate to me that the phone is factory unlocked. However, when I tried a sim card from Germany, it prompted me for an unlock code. I travel to the us and around the world often so I want the phone to be useful everywhere I go so I purchased an unlock code from eBay and the code they have given me does not work.

Are there different types of locks that they put in from the factory? Is it possible that I have a phone that is only allowed to be used in North America? If so how would I check that?

Sent from my skyrocket on Embryo
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] droidbabyxda:
Follow the unlock method here and you should be alright
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Jhebi:
Yes........Dolicious!!!!!! It works flawless. To everyone as long you follow the OP steps, you can't got wrong at all.

You need the ROM and MODEM as op stated and you are golden. :victory::victory:

Just tested with prepaid T-mobile sim card and works like a charm.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] engnrd:
It worked! Thank you so much for finding this hack.

Question though, I was on stock ICS when I first tried this, and it didn't work. Read through the thread and figured out that I didn't have the right modem installed. There were a couple posts that made it seem like it might work if I just installed the modem linked in the first reply, but quite a lot more that said I should install both the modem and the ROM. Just to try, I only installed the modem, followed the steps for the hack, and then updated the modem again to this one. I didn't get the success message, but all the menu items were good, so I chose to believe! and when I went to Vodafone for a SIM card everything worked. I've been using my phone for a few hours now, and everything seems to work beautifully. Was there a specific reason people said to install the ROM as well? Was that mostly for people that are running custom ROMs that might now work with the modem, or should I be on the lookout for issues that might crop up later?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] cschmitt:
Most custom ROMs don't support the dialer codes to access service mode.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] kchen96:
If I do a nandroid and then flash the rom and modem, will I have my UCLL3 modem again when I restore? I can't seem to find that modem in a flashable zip... But if anyone could send me a link that would be great too. Thanks
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] droidbabyxda:
I don't think nandroid includes radio. UCLL3 zip is in the dev thread or use search engine, should be easy to find.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] colinjlyon:
No they do not include modem
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jsarino:
Like cnewsgrp on page 8, I didn't get the 'PERSO_NV_INIT is SUCCESSFUL' message either. To test, I didn't have a T-mobile SIM, so I used a Cingular (pre-ATT merger) SIM, and got the message "SIM not provisioned MM#2". Does that mean I'm unlocked, or is the Cingular SIM too close to ATT's to use as a test?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] droidbabyxda:
SIM is not compatible.. have to have a 4g SIM for this phone ... I think.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vincom:
it usually means its not an active sim card, no account associated to it, but that message indicates it is unlocked as it tryed to get on the network, just try to use any1 else sim card that the phone was not locked to to definitively test the unlock
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jsarino:
Will do. :) Now, if I can find a friend locally that uses T-Mobile that I can use their SIM to test. Going out of the country in a couple of weeks, so I'd like my phone to be unlocked.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vincom:
make sure you have the right radio and apn's b4 leaving
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] colinjlyon:
If you don't, you could always use wifi to Google them :P lol
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] kchen96:
Hold up... If I go abroad, and get a prepaid sim, I would need their radio too? What if I use the ATT of whatever country I go to?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] cschmitt:
Any ATT radio will work for basic voice/text/data abroad, provided it's a GSM network.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] droidbabyxda:
I am abroad and did this unlock. My voice and text are okay. Didn't want to pay for Data plan so I can't tell you.

I'm using UCLL3 radio on Embryo 6 ROM. I also tried the UCLI3, UCLF 6 the radio here.. all worked fine.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jsarino:
I guess my next question is, how do I find out what radio I have on mine now?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Mike:
System settings-->about phone-->baseband version

------------------------------------------------------------------------

Sent from my Skyrocket i727 w/ Blinky'sRevenge

-----------------Nexus 7 running AOKP M1-----------------
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jsarino:
Duh, I should've known that. :p Anyways, my baseband is UCLD2. So, assuming my phone is unlocked (still need to check with someone that's got a T-Mobile SIM), any ATT radio should work in a GSM network overseas. I'm heading to Malaysia, and their network there is GSM.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] droidbabyxda:
Flash the UCLI3, so far that was the radio I had the best signal on. UcLD2 is an old ATT radio. You should be fine.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jsarino:
I think I had UCLI3 before but flashed the older version to unlock the phone. I'm getting UCLI3 again as you suggested (http://xdaforums.com/showthread.php?t=1785999).
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] atinder:
The modem zip isn't working, for all people who are having problem. They'll need to flash the mdm.bin, using odin and then it works fine. IDK maybe you wanna add it to the post. Thanks for your help.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] roghax:
It work for me.

Thanks from Honduras
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] intelxtreme:
Can I flash with twrp
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] crashpsycho:
delete

yes u can
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] RaZerSide:
Jelly Bean unlock

I Have I727r rogers with UCLD2 ICS 4.0.3 and I want to install Jelly Bean on cell.

Can I unlocked my cell with Jelly bean ?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jd1639:
Read the op.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] colinjlyon:
Read the op, and yes :P
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vbrookie:
All I am going to say is it this method has unlocked my phone and used in Mexico, Dominican Republic and in Honduras Claro network. I am currently in Dominican Republic and using it on my phone and tethering without issue.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] intelxtreme:
where can i download stock ics or gb
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vincom:
really?

look down, lol
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jsarino:
Saw this on Mashable today...all the more reason to do this. :): http://mashable.com/2013/01/23/unlocking-cellphones-illegal/
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] intelxtreme:
mine says network off after service entries dont get succesful
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] porkchopsandwiches:
Confirmed working on my AT&T i727 using the UCLD2 modem and rooted 4.0.4 firmware from post #2. My father's O2 SIM and my stepmother's Vodafone SIM both work like a charm. Just had to back up my current CM10.0 firmware using Nandroid and then flash back to 4.0.4 rooted stock and follow the instructions. After that, just had to nandroid back to my settings and then flash a new UCLI3 modem package. This method is quick and much easier than it was on my Samsung Infuse i997. Next to try it on is my mother's black Skyrocket. :)
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] xda1zero:
Confirmed working on an i717r Canadian phone using method described in post 1 and files from cshmitt post 2. Thanks guys

---------- Post added at 03:40 PM ---------- Previous post was at 03:38 PM ----------

---------- Post added at 03:42 PM ---------- Previous post was at 03:40 PM ----------

Read the first and second post again, and don't forget to thank both of them
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] intelxtreme:
it does work just unlocked a skyrocket att version
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] latinohot:
If you missed it, after January 26th is illegal to unlock phones in the u.s.a.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jd1639:
That's for new phones. Mine's old:D
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] shak1044:
First off thank you for the great release. It is greatly appreciated. However, while I was unlocking my phone a problem arose.. I followed all of the steps as listed I flashed the modem and the stock rom, and then proceeded as stated through the dialer menu. Unfortunately, when I get to the final step I never receive an initialization success confirmation. The device is locked to ATT, and I'm trying to use a Vodaphone sim. Thank you in advance.

Extra information that may help:

Android Version: 4.0.3

Baseband Version: I727UCLD2

Build Number: IML74K.UCLD2
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
Have you tried putting in another SIM to try it out? I didn't receive any confirmation message either, but it worked for me.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Logix:
quick question

do you need to use the tmobile modem after to get full tmo hsdpa speeds if your using a tmo sim

or do you reach the same speed with the att modem?.

reason why i ask is im on st and tmo side is way faster here.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] PeteSeiler2010:
I had a few issues, but it all worked out in the end. I wasn't able to get the ROM posted to boot past the Samsung screen, so I just Odin'd back to stock UCLF6, flashed CWM and then flashed the UCLD2 Modem. I did this without having a SIM in my phone and i tested this with a T-Mobile SIM and I have service.

BIG THANKS!!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] JoBroCro:
I can confirm this worked on my Rogers i727r.

I used the ROM and modem in the OP. The first time after flashing both it didn't load...just stayed on the "android" screen for several minutes. So, I pulled battery and rebooted to TWRP. Did factory reset (3x). On my first attempt (the one that hung on the boot screen) I had just wiped once. After that it worked perfectly.

Thanks so much for this.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jedah:
If you're in an area where their 1900 Mhz spectrum was refarmed, then I think you're good to go for HSDPA. Otherwise, yes, you'l need to flash a T-Mo radio.