yashsingh1/xdaforums huggingface dataset:
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] TonyMac70:
This helped with unlock code from ATT

I was able to use part of the instructions in this thread to unlock my skyrocket.

We were given the unlock code from AT&T but it was always unsuccessful. The phone is running CM 10.1.3 RC2 with UCMC1 modem.

After performing a backup, I installed the OEM stock rooted image and UCLD2 radios from the cschmitt's post on page one.

Once the stock OS was up, I powered off and installed the foreign SIM card and started it up.

This time the unlock code from AT&T worked.

Powered down and put the original ATT SIM in, verified connectivity.

Then restored the CM10RC2 and the modem - all working.

Thank you.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vincom:
need to be on stock firmware for unlock code to work, although UCLD2 is a leak it is considered stock
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] TheCybertronian:
Unlock is confirmed to work even with an at&t Sim. I unlocked prior to my switch to t-mo today. Paying 62 bucks for unlimited.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] k.houan:
HELP

oops
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] willy_itc:
Help meeee

I did this process and now

When he called me not listening Help Me

Unlocking Worked Well:(
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] ismael247:
Please someone help me

I have tried this over and over am i missing something it just doesn't work i get the PERSO_NV_INIT is SUCCESSFUL and i reboot but it still doesn't recognize my sim card. Please can someone help me i would appreciate it. Thank you
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] lart2150:
is it asking for a unlock code? This process only helps with unlocking your phone. When I first got it I noticed some old sim cards don't work with my skyrocket.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] ismael247:
no nothings comes up what do you think the problem is. Is it the sim card
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] lart2150:
That would be my guess. Do you have another simcard from another carrier that you can use to test?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] 350Rocket:
I tried this first and failed due to my own error I'm sure. Then I paid for an unlock code online and it kept failing too (possibly because of what I did trying to run this free unlock), anyways rooting and flashing the at&t full ROM and radio suggested as working and then got it unlocked with this process. It saved my Bacon.

This is a rogers phone I'm using on Telus. Lte is not working but HSDPA is.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] jd1639:
Check you apn and make sure it's correct for lte

Sent from my Nexus 5
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] 350Rocket:
APN settings are the same as what other people have and they got lte but I haven't verified if anyone has gotten lte with a skyrocket on Telus. It was working on the s3 but it was a stock Telus phone.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] willy_itc:
Realize ese desbloqueo y no me escuchar y cambie bocina y nada se escucha avece

do not listen to me

My phones s2 i727

Help meeee plzzzz:(

---------- Post added at 08:05 AM ---------- Previous post was at 08:00 AM ----------

No me escuchan por que sera ayudaaaaa
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] AMCJUNGLE:
Easy sim unlock method

There is a simple easy sim unlock method. Follow this wise mans words......

https://www.youtube.com/watch?v=F4ONom68Jig
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Devilish_Angel:
... in the final step when pressing [4] NW LOCK NV DATA INITIALLIZ, it takes me to SHA_256_Enbaled_Flag [0] screen instead of showing PERSO_NV_INIT is SUCCESSFUL :confused: ...
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Richdd:
Hello. I tried this, but when I press the menu key back to the Network Lock screen, option #4 has "RAT_FREE_Supporting ON"

Did I do something wrong?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] wallybanger:
OK, now I'm really confused. Working with an 727R in Canada. After flashing both of those roms the NV unlock option was in the NV lock menu. When I hit it, it does nothing. With SHA256 enabled or disabled, doesn't seem to make a difference. Once I saw "successful" flash on the screen after doing the unlock but it still won't work with my sim card. wtf?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] bmyury:
reverse sim unlock

Is there any way to reverse sim unlock if it was done on i727 as suggested in the beginning of this thread? I unlocked in original stock (gingerbread) and then flashed to JellyBEan and UCMC1 radio

I find that after sim unlock my phone (i727 AT&T) randomly (couple of time a day) shuts out of service (going into emergency call only)

I want to try to reverse it and to buy the code.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] ocd_amp:
SIM Unlock has nothing to do with your issue. It is seperate from the Radio. You need to flash the proper Radio. Also, Flash a proper stable ROM. Going out of service could be a result of many factors, but Network Unlock has nothing to do with it.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] rpjones68:
Worked like a champ and now back on KitKat 4.4.4! Thanks Vincom!!!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] pseter:
I tried it on cm 10.2 and had no luck, tried with the radio described too.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] racklers:
Thanks a lot u r the man

thank u so very much 4 ur information i just have to change my radio from UVL1 to UCL2 to get the neccessary service mode menu item and get my phone unlocked

i was looking for a month and nothing that i did works but your information is not in any place

One more time THANKS
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] saaqirajput:
I have a Samsung Galaxy SII LTE SGH-i727r, running JellyBean 4.1.2.

Can I unlock this phone? If yes how please. Thank you
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] bproulx:
Got a rogers i727r and was running cm11 on it when I found this thread. Tried it on cm11 and of course as advertised it didn't work..so flashed the attached ROM & modem, followed the directions and after a reboot was sim unlocked. Confirmed working method here just follow directions. Made a nandroid backup first and restored it and flashed back my original modem. Good as new. Can't even tell I flashed anything after the restore. Its like I never left only now..I'm sim unlocked. Great work! Thanks a bunch!!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] toejam122:
Hey there,

I have a 1747m locked to rogers.

I tried to flash the provided rom and now my s3 won't turn on whatsoever. I obviously can't flash it again if I cant put it on download mode. I was running 4.4.2 if that matters. Thanks in advance. Really missing having a phone right about now haha.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vincom:
u most likely bricked ur phone as that rom is for the i727
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] ocd_amp:
Have you ever tried to put a Lawn mower engine into your family car and if so, how is it driving? Let us know ;P
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] toejam122:
wow can't believe I did that

.... Yeah it won't even turn on whatsoever. Is there anyway to unbrick it to your guy's knowledge?? Thanks for the replies... I feel pretty dumb right about know.. thanks.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] KorbenDallas2016:
Where do you get the necessary stock ROM and modems? Can someone please provide links? Thanks!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vincom:
all roms/modem in my sig for 1stop.

roms to unlock are in this thread or here http://xdaforums.com/showthread.php?t=2638037
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] gpriore:
My SGH-i727 has the UCLI3 in its' original stock ROM. And where you say "Press [6] NETWORK LOCK", [6] is actually "REALTIME LOG(OFF) - DON'T!". [4] is actually "NETWORK LOCK". Then after I press "[3] PERSO SHA256 OFF" and wait 30 seconds and press the back button, where you say "Press [4] NW LOCK NV DATA INITIALLIZ", I don't have that option. [4] is actually "RAT_FREE_SUPPORITNG ON".

What do you recommend I do?

Thank you in advance for your time.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vincom:
maybe try this way http://xdaforums.com/showthread.php?t=2638037
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] gpriore:
Thank you very much for your time. However, the method you mentioned entails having to do flashing of a custom ROM, which is highly dangerous! I already did this on my beautiful and flawless Verizon Galaxy Note 2 {SCH-i605}, and actually bricked it! Now my goal is to find a smart Android software specialist who can bring that phone back to life again.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] vincom:
unlocking wont work on the rom that youre on.

as for not bricking, read, read, read.

option, pay to get code, ebay depending on price.

jtag is usually the only way to bring back a hard bricked device but sometimes a USB Jig might work.

soft brick can be fixed by user if they read, read, read.

"flashing of a custom ROM, which is highly dangerous"? r u sure youre in the right forum
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] gpriore:
Of 'course' I'm sure I'm on the right forum. Here is the latest message I just recently posted on another forum of a person who was talking about a LiquidSmooth ROM for the Samsung Note 2 {SCH-i605}:

Four years ago I found a genuine expert who unlocked and rooted my Verizon Samsung Galaxy Note 2 {SCH-i605} smartphone, and he even installed a custom ROM onto it {called CleanROM}, which has always worked perfectly. But I never saved that man’s contact info. And now I wanted to install the Lollipop 5.1.1 operating system onto it. I made sure to have the latest TWRP installed and updated. I have no clue what Safe Strap is. All my personal info is saved onto my computer, but I did not backup the operating system. Then I installed CyanogenMod 12.1 Nightly, as well as the GApps package {both specifically designed for the SCH-i605}. This operating system actually worked more beautifully on this phone than anything I’ve experienced, but every time it booted up, I had an endless stream of errors stating that every Google app stopped working. I wiped the Dalvik Cache, Data, System, and even did a Factory Reset afterwards, but it made absolutely no difference. So then I tried your LiquidSmooth ROM, following the exact same method. But it did NOT successfully install like the CyanogenMod 12.1 Nightly ROM; instead it failed. Then as a last resort, I decided to used the full original factory image directly from the Samsung-Updates website by using the Odin flashing software. It showed the yellow random COM message. There was no blue color; it was yellow. The entire process was successful; it showed a PASS message. But interestingly after that very first reboot, it would not get past the Samsung logo that displays the moment the phone is powered on! And now it just endlessly loops that Samsung logo! All I wanted to do was simply give this phone an update of the latest and finest Android operating system, because, I had been using the old CleanROM operating system for four years!! After verbally explaining this whole scenario to someone else, they told me they believe I may have bricked the phone, which would be disgustingly devastating, because, this phone is flawlessly gorgeous beyond belief!! There is NOTHING wrong with the hardware, and the cosmetics are PERFECT like day #1!! If this is just a damn software issue, then there should always be a way to do some type of proper clean install to revive this phone to working condition!!!
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] ocd_amp:
Read [MENTION=4057370]vincom[/MENTION] threads. The information there is valuable and can serve you even if your model of phone is not similar to the ones he has posted on

As for your Problem of not booting after your "pass" message in Odin, You need to go back into Recovery, and Clear your Cache partition.

If you want to unlock your phone, you will need to be on the Stock ROM because it will offer the interface required to turn Encryption OFF. That is essentially what Unlocking is. It is to turn off Encryption, change the Lock state, and then optionally, turn it back On. After this procedure, you can Flash TWRP and Cyanogenmod, and your phone will be permanently unlocked.

If you do not want to "BRICK" your phone, do not flash Bootloaders/Modems unless specifically required to do so for your choice of ROM.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] gpriore:
I already 'did' clear my cache partition. It makes no difference whatsoever. Also, I forgot to mention one last detail. After I had received that Pass message, and afterwards the phone would not boot past the Samsung logo screen, when I then attempted to re-install the factory image software using the Odin, it no longer displayed a Pass message anymore. It now consistently displays a Fail message. I would however like to thank you for introducing me to a new possibility I never knew of before, called 'jtag'. I will read up on this and try this as my final option.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] RootingMaster:
Do you think this method of unlocking will work for my sgh-i727r running CM 12.1

Baseband: I727RUXUMA7

Rom: CM 12.1
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] legend999C2A:
It doesnt work with me on a sgh-i747 4.1.1 android.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Jack_R1:
That's because you're looking at the Galaxy S2 Skyrocket section, and your device is Galaxy S3. Try looking at the right forum, it'll help ;). You're really lucky it has internal checks that prevented it from updating.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mkicon:
I apologize first for being a newb, but when it comes to doing stuff to my phone I like to be thorough and informed before I even make attempts.

First in the OP it was stated " make sure the number matches the text next to it."

Once in the "Simulation" menu, my network lock is 4 instead of 6. I went into 4 and the next step ([3] PERSO SHA256 OFF) was there and was 3. I just wanted to make sure this previous discrepancy isn't a sign of this method not being viable on my phone.

I am on a rooted, stock ICS rom from AT&T. Do I need to flash anything before trying this method? The "modems" part was what threw me off, but admittedly I don't know how to check my modem.

Again I apologize for what must seem like the the stupidest questions to most of you, and thank you for your time.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dulexetina:
amazing :) just unlocked my sr!!! dont think that i waited for 30sec and one minute when it asked,but no issues :) THANX people
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] cschmitt:
@mkicon - as long as the menu options are the same text having a different number is probably Ok. Modem version is listed as baseband version under about phone. Since you are already on stock ics you shouldn't need to flash a different rom. What is your current baseband? Sounds like it might work to unlock.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] droidbabyxda:
For some reason, I had to flash the ROM and the modem posted here before I could unlock the phone. (I was on ATT stock ICS... Debloated). It is just easier to do nandroid, flash both files, unlock, and do restore. You will need to flash a newer modem afterwards.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mkicon:
UCLI3
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mahanddeem:
Thanks so much ...

Just to make sure :

SHOULD I use a "NON-at&t" SIM during the process of unlocking (i.e before entering the secret menu) or it's not necessary?

Thanks again
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] dvandam:
It's not necessary. I unlocked using an AT&T SIM. Having a different one is just an easy way to ensure that the unlock worked, because if it didn't then you wouldn't get a signal.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mahanddeem:
Good idea .. Thanks
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] avn128:
Reverse the process?

Is there a way to reverse the unlock.

I was able to unlock my phone using this process but, then shortly later figured out that there was a negative effect. Whenever I insert any SIM card I get a message that's is titled "Sim Card Removed" the SIM card is from AT&T and I have also gotten two replacements to make sure the SIM card was okay. I even inserted paper between the SIM card and the holder to make sure the connection was tight. The phone notification bar shows 4g LTE off and on, the signal bars always show zero, even though I am able to make call and go on the internet as long as the 4g LTE is in the notification. It wouldn't be a problem if the "Sim Card Removed" pop up could be exited but, the problem is that I cant exit it. I can only hit the restart button that the message makes available. the rest of the message says "The mobile network will be unavailable until you restart with a valid SIM card inserted". I've tried many different things removing the battery, swapping SIM cards, restoring an old nandroid backup. Please help.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] lart2150:
Are you swapping sim cards while the phone is on?

To reverse the backup you would need to have backed up some partitions (not done by ndroid).
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mahanddeem:
What partitions exactly?

I feel sorry for this member!! and feel happy that I didn't proceed for this procedure !
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] lart2150:
my guess is mmcblk0p21 aka /efs. With that said I don't think the phone likes hot swapping sim cards regardless.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Logix:
im pretty sure odin will restore that partition.... some how a full wipe dosent? i dunno... can i just back up the efs partiton manualy by zipping it? n how do i restore.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] cschmitt:
EFS data is stored in mmcblk0p18, neither Odin or nandroid will backup or restore this partition as it's specific to each device (lock code, IMEI, mac addresses, etc.)

No, you cannot hot swap sim cards, a reboot is required if switched while powered on.

I seriously doubt this unlock method messed up the phone.

Are you saying you cannot boot up with a certain sim card and get signal?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mahanddeem:
avn 128 please clarify your problem....so that we can know whether this method is associated with bad effects or not...

And again: are you changing Sim cards while the phone is powered on ? I always thought you can't hot swap Sim cards on the skyrocket!

---------- Post added at 09:27 PM ---------- Previous post was at 09:24 PM ----------

The new CWM recovery by sk8...... in the dev section has a feature that lets you back up and restore that partition as an image...
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] droidbabyxda:
is anybody else getting this problem. now i'm worried coz I did this unlock out of the country.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] cschmitt:
Ok, here goes...

The 'efs' partition that CWM is backing up is mmcblkop21, which is mounted as /efs on the SR. This is NOT the 'real' efs data, only copies of certain properties like BT and WiFi MAC addresses, IMEI, etc.

In fact you can blow away everything in the /efs partition, except the /efs/imei/keystr file, and it will all be regenerated by the radio on the next boot. And /efs/imei/keystr can be generated manually, it's simply a file with an ON flag that tells the radio it's ok to dump things into /efs on boot. I've done this myself and know that it's safe.

The actual EFS data is stored in 3 encrypted partitions mmcblk0p18, mmcblk0p19, and a 'golden backup' in mmcblk0p20. This data is accessible by, and can only be decrypted by, the radio software-- which is why the radio writes certain properties to the /efs partition on boot -- so that ordinary apps can read the MAC, IMEI, etc. without having to be granted access to the encrypted data (and most certainly to protect the decryption routines.)

Now when you unlock the SR, either with a valid unlock code or using the method in this thread, the service mode app that is access by the dialer 197328640 command is actually bringing up the menu items stored in the radio (which is why only certain radios work for this method) and the menu item is issuing a command to the RIL (radio interface library) that tells it 'hey, lets unlock this phone' and the radio is actually performing an update in the encrypted data stored in mmcblk0p18 and p19.

So, unless you have backed up mmcblk0p18 and p19 (using the dd command) prior to performing this unlock method, there is no way to get back to square one, but I don't think that's a big deal because this method is safe if the instructions are followed.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] Logix:
soooo... whats the best way to do this i just used es file explorer and ziped the /efs folder.. what else do i need to do before I do this kernel sanders??

also since you have some expertise in this i run straight talk with a att sim which can roam on tmobile how do i force roam like roam control for sprint/verizon

tmobiles hsdpa is like 4x faster on straight talk.

Run the tmobile modem i guess is step one i have that thread for the aws band.
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] TurboTronix:
Anyone got this working on a Rogers (Canadian) device, also how do I know what modem I am on and which one I need? Using CM 9.0.0-skyrocket
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] cschmitt:
Backing up EFS data

To backup the /efs mounted partition and the EFS data partitions to the sdcard, issue the following commands from an ADB shell or on-device via a terminal window. You must have root access to do this.

su
dd if=/dev/block/mmcblk0p18 of=/sdcard/mmcblk0p18.bin
dd if=/dev/block/mmcblk0p19 of=/sdcard/mmcblk0p19.bin
dd if=/dev/block/mmcblk0p20 of=/sdcard/mmcblk0p20.bin
dd if=/dev/block/mmcblk0p21 of=/sdcard/mmcblk0p21.bin

To restore, just reverse the parameters for in file and out file:

su
dd if=/sdcard/mmcblk0p18.bin of=/dev/block/mmcblk0p18
...

If you want to know what each partition is, that's here: [REF] Skyrocket Partition Info
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] BRIMS7ON3:
Is there a way to check if it worked without having a non-network sim?
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] TurboTronix:
Worked on my Rogers I727R S2 LTE.

ROM used: I727RUXLF3_I727RRWCLF3_RWC

Modem: UCLD2
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] mahanddeem:
I think the extension of the backed up partition should be .img (not .bin) ?

PS:Second question please : did you "actually" try reversing the command and succeeded with it ? and should it be from inside Android (when the phone is on and running) or on recovery ?

Thanks
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] [bman123]:
This worked for me, just got my S2 from craigslist today and it worked the first try. Directions were really easy to follow also. Great job for coming up with this.

This was on a AT&T SGH-I727 skyrocket, was running 4.0.4 Used odin to install CWM, then used the files in post #7 then the first post on what to push in the menu and it went thru immediately. Thanks
[AT&T Samsung Galaxy S II Skyrocket SGH-I727] cooldude89:
Help I cant unlock my skyrocket s2 for atnt

Hi, i just bought my skyrocket s2 for ATNT brand new that has a UCLI3 base band version. I have tried the unlock process but for some reason it does not work.

I Go to dailer screen. press *#197328640#.

press [1]DEBUG SCREEN

Press [8]PHONE CONTROL

Press [5] SIMULATION

Press [4 instead of 6] NETWORK LOCK

Press [3] PERSO SHA256 OFF

After that it come:

MENU NOT EXIST

PRESS BACK KEY

Current Command is 18543

Any idea what I am doing wrong, I have a sim from another network inside to let me know if it is unlock or not.

Please someone guide me as to what I might be doing wrong and what i need to do to fix the problem and unlock the phone....