yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab General] hacker20107:
i need help guys

hi every body

i just got my galaxy tab yesterday and i started with the below instructions to unlock it and i did the following

-

"root" it first - z4root ( permanently root done )

buy/install rootExplorier ( i tried to do copy the folder but it's not coping any components or the folder it self,( do i need to backup the efs folder to the root folder or to the SD memory and how is that can be done?

backup /efs ( i stuck her because i need Hex editor.apk , could some body help me in that because im not able to connect to market )

copy nv_data.bin to safe place

edit as per suggestions - this is only one byte I have changed:

0x181469 change this one byte from 01 to 00

mount / in rw

put the nv_data.bin into /efs

delete nv_data.bin.md5

reboot

define AP

reboot again

got a gmail !!!
[Galaxy Tab General] Croak:
I think the rule of thumb we're going by here is that if you can't figure out how to find a hex editor with a little Google-fu, you're probably not ready to be hex editing in the first place.

I.E., we don't want to be spending all of our time dealing with people who've ****ed up their unique and critical nvdata files. Consider it a little barrier to entry.

I mean, we've had to ****ing explain OFFSETS in this thread, for crying out loud.
[Galaxy Tab General] maxtcee:
lol croak lol
[Galaxy Tab General] hacker20107:
chaing the nv_data.bin

can some body help me to update the required changes into my file of the nv_data.bin which i attached it in my current post .

Again thanks in advance
[Galaxy Tab General] adinis78:
A lot of us want to get the right info on how to do this so that is why we ask, if it feels repetitive is because no one has given a straight answer. I would ask the same question in regards to the hex editor since we do not want to screw up our device, not all of us are knowledgeable how to do certain things. We all come here looking for help from those that know so please bear with us.
[Galaxy Tab General] adinis78:
thank you for the steps, im sure this is what people were looking for. now i will need to set some time aside to try it, but i have a few questions:

you mentioned just open up a copy make sure you save you original nvdata bin then make all the changes i got all that, but then you stated deleted the nvdata bin and nvdata5 bin in /efs folder but where were all the changes made on both nvdata bin and nvdata5 bin or on one of the files, that's where i am confused.
[Galaxy Tab General] moviecouple:
So once I have the device unlocked... is the only way to get data working with an AT&T SIM to flash a copy of the Bell modem.bin that is in the post... [HOW-TO] Flash your at&t Tab to make calls + 1900+850 WCDMA - UPDATED??
[Galaxy Tab General] jnutz:
You realize that file contains your IMEI and serial number right? Not something I would have shared with the internet but it is a little late now. Be careful about uploading random files from your phone because some of them contain sensitive information.
[Galaxy Tab General] n123456:
Got my Rogers Tab unlocked as well. Just followed the instruction and help from borodark... Thanks

Tried Fido on it and it worked. Although I can't seem to get mobilicity to work for some reason....even after i created the APN for wap.davewireless.com

thoughts?
[Galaxy Tab General] maxtcee:
no you delete your original nv data and nvdata 5 file using root explorer then copy your edited nv data file only into to efs folder

the nv nvdata 5 bin will regenrate once you reboot

in essence your saving 2 one of them will be the one your editing nvdata bin

and one in case something goes wrong nvdata bin and nvdata 5
[Galaxy Tab General] maxtcee:
yes you might have to flash a euro rom on it as well
[Galaxy Tab General] borodark:
i have already voice plus data from fido so paying around 60cad
[Galaxy Tab General] borodark:
mobilsity data? are not they have different radio frequencies for they 3G?
[Galaxy Tab General] n123456:
so this tab may not be usuable with mobilicity?
[Galaxy Tab General] aguiamaster:
long live to hammer<:) and alex
[Galaxy Tab General] Croak:
You want the T-Mobile version for that, since Mobilcity is AWS (which up here in Canada means Almost Works Sometimes).

But unlike T-Mobile's more robust, actual, real, nationwide AWS network in the States, the micro-networks WIND and Mobilcity have built up here don't seem to have any 2G EDGE as a fallback.
[Galaxy Tab General] n123456:
Thanks Croak ... appreciate the feedback
[Galaxy Tab General] ckjy:
For some reason, I cannot write to /efs nor any files in the directory. I can delete nv_data.bin but I can't write anything back into the directory.

I am rooted, and can see all of the files, as well as everything in /system. I am definitely mounted in rw, and have tried adb, and even through terminal emulator to remount /efs as rw.

Is there something protecting this directory that prevents me from making any changes to it?

Edit: I figured out the reason. I didn't have busybox installed. Downloaded it from the market and everything copied great.
[Galaxy Tab General] STEEPSIDE:
Props for the Solution

Just like to say thanks to Rotohammer for a simple procedure and Croak for the quick tutorial on reading the code!!! I had used the discredited method and had a BS IMEI number but thanks to some good reading I backed up my efs/ folder and was able to revert back and use the correct procedure!!! IMEI is intact!!

:D
[Galaxy Tab General] Technomancer:
I think byte offset 0x18150F is number of unlock attempts

Also, at byte offset 0x180075, there is a list of 6 digit GSM network codes

My AT&T tab has 31015031017031118031041031098099999

Decoded using http://en.wikipedia.org/wiki/List_of_mobile_network_codes_in_the_United_States 310 is USA:

310 150 Cingular Wireless

310 170 T-Mobile	Formerly Cingular Wireless CA/NV known as "Cingular Orange"; previously Pacific Bell Wireless

311 180 Cingular Wireless	Not in commercial use

310 410 AT&T Mobility	Standard; formerly Cingular Wireless standard

310 980 AT&T Mobility	Not in commercial use

99999
[Galaxy Tab General] cvega99:
Great work. Thank you for sharing! I have the Euro code, a rooted Tab and fully functional phone but it SIM locked to initial provider. I need to unlock it. I installed HexEditor from the Market Place. HexEditor has superuser access. I go to \efs\ and open up .nv_data.bin. It's all zeros; I am unable to jump to location 0x181469. The file seems to end long before that.

Should I be using a different editor? Thanks in advance!
[Galaxy Tab General] Croak:
Yes, you should be editing it from a PC (after making a backup, of course).
[Galaxy Tab General] youtube10:
Hello, I tried this the first time, but I forgot to change one of the hex codes. Upon rebooting, when I tried to get into the efs folder, it appears I have been locked out! I can access and view all other files in the same directory as the efs except the efs folder itself. How can I view the files here again?
[Galaxy Tab General] youtube10:
I figured out how to get back into my efs folder. I apparently had my tab on temporary root. However, changing the two hex codes does not unlock my tab. Little more help please?
[Galaxy Tab General] rotohammer:
The editor is fine, you should be editing a different file!

Its nv_data.bin without the leading period.
[Galaxy Tab General] rotohammer:
Little more info please?

Explain the steps and what you see in the editor and on the screen when you reboot.

When you power on the phone with a different carriers SIM card you still get prompted for the unlock code?
[Galaxy Tab General] youtube10:
I backed up my efs folder and then made a copy of my nv_data.bin file. I then took this file hex edited it at adresses 181469, 18150e and even took the advice of someone else on this thread by changing all addresses from 180069 to 1800ce to "ff" after the previous edits did not work. I then proceeded to delete the original nv_data.bin file and nv_bin.md5 file, after which I copied the hex edited file into the efs folder, finally I reboot. When I reboot, it asks me for the unlock code (with 3 attempts remaining).
[Galaxy Tab General] rotohammer:
Luckily, with your backup, you now have unlimited attempts remaining. Lets try a new strategy, copy back a copy of the original nv_data.bin to /efs and edit it there (just the 2 bytes) with the hex editor from the market, then reboot.
[Galaxy Tab General] youtube10:
Thanks for your promptness. You're all kinds of awesome. I tried what you suggested, but on reboot, the sim lock screen still pops up.
[Galaxy Tab General] cvega99:
Thanks. How do I edit it from the PC? When I try to abd push it tells me access denied. I can do abd shell then SU and get to the folder but then what? I don't know what the commands are to copy to and from the computer since push and push don't seem to work on this folder. Somehow I need to SU the adb pull and adb push...

What is the easiest way to copy files back and forth?

This is the final piece of the puzzle. Samsung Tab is working great as a phone... just need to unlock it so I can use my primary SIM on it...

Thanks.
[Galaxy Tab General] rotohammer:
Even though I agree with Croak that file editing is best done on a PC, this is one case where its bit more of a hassle. Luckily, because its only 2 bytes that needs to be changed, editing right on the Tab is feasible, almost trivial.

Don't forget to read my previous post, you were editing the wrong file!
[Galaxy Tab General] rotohammer:
Look for a pm above.
[Galaxy Tab General] cvega99:
Thanks. I did see your email. I had a typo in the post. It doesn't have a leading zero. There is no such file in the directory. Sorry to add to (my) confusion.
[Galaxy Tab General] youtube10:
I'm sorry, I'm a bit new to this. What's a pm?

Edit: Would it help if I could send you a copy of the nv_data.bin for you to look at?
[Galaxy Tab General] rotohammer:
New method

Since hex editing was getting to be a bit of a chore, I made a script to do all the work. I updated the 1st post with the new method.

Back up your /efs folder first! Theres no excuse for you not to!

Now go read the updated post.
[Galaxy Tab General] youtube10:
Looking at that beautiful code makes me want to change my major from mechanical engineering to computer science. *sigh*.
[Galaxy Tab General] xoltrix2000:
Hi Roto, thank you so much for this guide.

I thought I should mention though that the new scripted method did not work for me. I used your original method of manually editing the hex and that worked well.
[Galaxy Tab General] cctw:
help!

I'm able to use root explorer to back up and extract the nav.bin folder and hex edit it..

but when I use root explorer to replace the modified one with the original one..when I paste the modified one in the efs folder it says copy complete but the file doesnt show up!

i try to reboot and the unlock code prompt is still there

anyone know what's wrong?

tia
[Galaxy Tab General] skoogee:
Thanks it worked fine

@rotohammer : thank you for sharing the unlock trick.

I have purchaced a T-Mobile Galaxy Tab from AMAZON and followed the instructions in post #1 and it worked fine.

in my case both i had to set to 00.

after making sure the SIM was working (i have an international one for the middle east) i have updated the firmware with the European one then added the Middle eastern Firmware as well.

Both phone calls and DATA services are enabled now :D

Thanks again for sharing the info :)
[Galaxy Tab General] elmotheelk:
Just wanted to add: I used the new method (executing the different commands via adb) and it worked brilliantly. I unlocked my T-Mobile US bought Galaxy Tab to work with my T-Mobile Netherlands mobile internet. 2G and 3G work fine after adding the T-Mobile NL APN as well. Thanks!
[Galaxy Tab General] monoko:
Roto I used manual hex edit it worked. Thx

but you new script would fail me, after i flashed at&t tab the way described in forum my /sdcard mountpoint moved to /mnt/sdcard make sure you acount for that
[Galaxy Tab General] youtube10:
Where did you get the European firmware? I unlocked my and it works with an AT&T sim, I have a Middle Eastern Sim, but that doesn't work. (My tab is T-mobile).
[Galaxy Tab General] adinis78:
was trying to pm you but you disable that option so i am trying to get your help here:

so i read somewhere that you managed to get a flashable stock rom for the t-mo tab, i have been trying to find it but i cant remember where it is. since there is word running around that t-mo might update the tab to use both voice and 3g i want to be ready to flash back to stock, if that is true of course. could let me know where to find it and how exactly to flash it back.. thanks...

i am wanting to unlock my tab using your method since t-mo wont give me a code for another 3 months since i just got the unlock code for my vibrant, but i am a bit iffy about using adb (never used it before but the step seems simple enough, copy/paste) and stuff and using the hex editor seems to be a bit complicated. so i dont know what to do.
[Galaxy Tab General] songlaze:
did you manage to see the file in /efs?
[Galaxy Tab General] rotohammer:
http://files.deodexed.com/ModADroid-Galaxy-Tablet/T-Mobile/T-Mobile_Stock.zip

As far as knowing what to do, that I can't help you with :)
[Galaxy Tab General] adinis78:
thanks, do i just add it on the PDA? any PIT?
[Galaxy Tab General] ozy1905:
Some good and some bad news :)

Hi Guys,

I have a T-Mobile Samsung Galaxy that that I bought from USA last week.

I managed to hex edit my SGT by using instructions of Roto(thx to him! ) but by changing the values 00181462, which was the closest to 181469 and keeping 00181507 same , which was again closest to 18150e.

When I tried it first time by root explorer and copy&paste, everythime I reboot the SGT I saw that the values were the same despite I change them and paste the edited nvbin file. I was managing the copy and paste by using rootexplorer, and then I paste the edited nv file by using ES file explorer and managed the change the values after the reboot operation. It is done!

I can see my turkish network operator, but I can not connect to the internet. I have checked the settings/mobile networks and click on data roaming and enabled it. However I still can not access to the internet. What can be the solution? Any ideas?
[Galaxy Tab General] rotohammer:
No Internet = missing APN settings.

Go set them for your Turkish carrier and it will instantly start working.

Google "APN settings your_carrier_name_here"

If you have no "G, E, 3G or H" indicator, then you need to select

"GSM Only" in Mobile Network Setting-> Network Mode .
[Galaxy Tab General] efxtr:
I've T mobile galaxy tab flashed with P1000XXJM6. I'm also using it in Turkey and everything is ok but after flashing, I can only get EDGE. Before flashing I could connect via 3G network. Isn't it weird?
[Galaxy Tab General] rotohammer:
Clarify when you did what. Obviously you had 3G in the USA before flashing.

So you had 3G in Turkey, then flashed JM6 in Turkey and now only have Edge in Turkey?

I don't think T-Mobile 3G should work in Turkey.
[Galaxy Tab General] efxtr:
I'd had 3G in Turkey (it was yesterday), I flashed it today and I've Edge right now. It might be due to temporary connection problem with 3g network though I'm not sure about it.
[Galaxy Tab General] rotohammer:
Ok, I did some Googling and found others have in fact used T-Mobile phones (Nexus One) in Turkey and got 3G using the 2100Mhz band.

So, theres two potential solutions:

You have to enable the 2100 band using *#2263#, and pick Combi Bands, select 1-5 which is all the GSM bands plus the 2100 3g band.

Or

Try flashing a different modem.bin file, perhaps a Vibrant one or the I9000. Flashing the original T-Mobile modem.bin will get your 3G back without voice.
[Galaxy Tab General] cvega99:
rotohammer! Thanks for your help. It worked like a charm. I now have a fully functional and SIM unlocked Samsung Tab! Thanks for dumbing it down for the rest of us!
[Galaxy Tab General] efxtr:
Thanks alot,

Unfortunately I cannot make combi bands checked. I can enter sub menu and select 1-5, but when I come back to band selection menu, combi band is unchecked.

Interestingly, WCDMA 2100 seems checked in WCDMA Band menu but I still have Edge. It seems that I should flash modem.bin but I'm not sure which modem.bin I should use to have 3g (as T mobile modem) and calling. Do you have any particular suggestion for which modem.bin should I use (ie I9000 2.2 modem file etc)?
[Galaxy Tab General] :
Many, many thanks, Rotohammer, et al. I am a noob.5 in the Android world, so thanks to everyone for your patience in explaining hex editing. With several of your instructions, I was able to unlock an AT&T Tab using only the editors on the Tab(HexEditor, Root Explorer), boot up with a VodafoneUK SIM, change the APN's, and check the score of my college basketball games. I use VZW for my phones, so there was no way that I was going to get AT&T to unlock for me while I'm on this trip.

Thanks again, folks. I sincerely appreciate the help!

CJ
[Galaxy Tab General] rotohammer:
I'm not sure which one if any will work. Try all the ones I've posted first. Flashing modem files is quick and safe, so try them all one at a time. Your results will help someone else I'm sure.
[Galaxy Tab General] efxtr:
Thanks a lot, I'm going to try as you recommended. It still seems weird since I can not use 3g after Euro flash in Turkey while I was able to use 3g with T mobile firmware.

PS: Do you recommend samfirmware.com or another source for modem files?
[Galaxy Tab General] ozy1905:
Thank you Roto, It definetely worked in my Galaxy Tab, but the same story I only have Edge, may be I have to flash it
[Galaxy Tab General] efxtr:
RESOLVED

Credit goes to Rotohammer.

I flashed with Samsung T959 Vibrant modem file www samfirmware com / WEBPROTECT-t959. htm, I downloaded T959UVJI6 ## NEW -it's actually T mobile firmware for Samsung T959 Vibrant- then uncompressed tar file with 7-zip).

I previously flashed galaxy tab with Odin 1.70 using Euro fimware. This time I only used modem.bin that extracted from file I mentioned above. Now it shows H (HSDPA) instead of E.

I hope this will help someone else.

Note: My service provider is Turkcell, so I'm not sure if it works with other providers.
[Galaxy Tab General] adinis78:
i downloaded the file, thank you very much but one question is there a PIT file to go along with it or i dont need one?
[Galaxy Tab General] castlevanian:
Not working for me after first 2 calls

I have a T-Mobile Galaxy tab. For editing the file I used a PC hex editor. After following the steps of overwriting the .bin file and deleting the .md5 file I was able to boot up the tab using an AT&T SIM without the unlock warning anymore. I was able to make 2 calls as well. However within 10 mins it seemed like I am in locked mode again. I can't connect to AT&T both data and voice. Whenever I try to make a call, it will say "Not registered on network"

Am I missing something here? Should I try something else?
[Galaxy Tab General] rotohammer:
That problem is unrelated to unlocking, which has nothing to do with the quality of your service. What you need now is to flash a different modem, like the Vibrant one I've posted in one of my threads. Try setting GSM Only mode in settings as well.
[Galaxy Tab General] ozy1905:
something strange?

After I have updated the APN numbers for my Turkish cell phone carrier, I have changed the simcards yesterday. TOday I changed my simcard again and I saw no internet connection and I figured out that the APN numbers that I have changed were same but only MNC number was changed from 02 to 01. So no internet connection! However the strange thing is that when I change number to 02 and try to save it, it erase the APN data!

Any solutions/ Suggestions?
[Galaxy Tab General] castlevanian:
It's working now!

Thanks rotohammer! Flashing the Vibrant modem.bin fixed the problem!
[Galaxy Tab General] Longhofer:
Thanks, the unlocked worked, however you should note that you NEED an SDcard. However I could not seem to get the 3G to work only edge, any help with that?
[Galaxy Tab General] efxtr:
Try using another modem.bin. I tried Samsung T959 Vibrant modem file and I'm able to connect 3g+.
[Galaxy Tab General] rotohammer:
I'd like to know specifically which Vibrant modem you used to get 3G. If you're sure about that, post it here. I haven't had any luck getting 3G with the the Vibrant modems I've tried.
[Galaxy Tab General] efxtr:
Dear Rotohammer,

It's Samsung T959 Vibrant, I downloaded it form samfirmware (T959UVJI6 ## NEW):

http://xdaforums.com/showpost.php?p=9674425&postcount=156
[Galaxy Tab General] rotohammer:
I just realized you're probably not in the USA, thats why you have 3G.
[Galaxy Tab General] efxtr:
Yes, actually I was able to use 3G after sim unlocking without any firmware change. After flashing with European ROM, I was able to use phone capabilities but I could only use Edge not 3G. After flashing modem.bin of vibrate, now I can use hsdpa
[Galaxy Tab General] spanky77:
Awesome steps Mr. Rotohammer! Worked like a charm!!
[Galaxy Tab General] 3dadd:
Trying to get back to Stock AT&T

Thanks again to Rotohammer for the advice in the past..

I've downloaded the stock AT&T from the link in the thread but when the Tab boots back up I get the Samsung start up animation and the screen stays black. I can still use Odin to get it back to the firmware to allow phone calls ( flash with WJJ4 then flash PDA with .tar with XJK5 and modem file)

The works fine, just want the ability to get it back to stock.

thanks.
[Galaxy Tab General] osukaaa:
i just unlock my bell P1000...

change 00181462 from 01 to 00

then delete nv_data.bin and the nv_data.bin.md5

then replace the edited nv_data.bin

thank you so much
[Galaxy Tab General] rotohammer:
I'll look into that later, perhaps I didn't test it well enough.
[Galaxy Tab General] jobasa:
Hi, thank's for the solution.

I've tested on my TMN samsung Galaxy tab, without any problem, now it's working with Optimus, only had to configure APN settings to get HSDPA working.

TMN -> Optimus = 100%
[Galaxy Tab General] Levelpar1:
Dear Rotohammer, I need your help!

I am very new to this and it seems like you are the person to ask.

I have a US bought T-Mobile Galaxy Tab. I am finding out their 3g coverage is not very good in all of the places I travel. My Tab is unlocked. I have an At&t Iphone with an unlimited data plan. I inserted my At&t sim into the Tab and I am only getting data on the edge network. I have be reading through all of the posts in this thread and it is very confusing to me. I would like to be able to switch my sim card back and forth between At&t and T-Mobile. What is the best fix so this devise will read the 3g networks for both carriers.

Thanks for your help!!
[Galaxy Tab General] Technomancer:
T-mobile Tab cannot do AT&T 3G and AT&T Tab cannot do T-mobile 3G,

It does not matter what ROM or modem.bin you flash. The hardware (amplifiers) for these bands just are not there.
[Galaxy Tab General] wiredlessguy:
Hey Roto, I am getting an error of "write error: No space left on device"

Any ideas?

Kleiny
[Galaxy Tab General] rotohammer:
The phone you have is not equipped with the circuitry to get 3G on AT&T.
[Galaxy Tab General] rotohammer:
Yes, there's no space left in the /efs partition to allow you to copy another file there, that's why you must delete or move out the original file before you put the edited one in its place.
[Galaxy Tab General] biocalves:
Is there a way to do this whole process on the phone through android terminal emulator? My gf took her AT&T Galaxy Tab out of the country already and since AT&T won't give her the unlock codes and she does not have access to a computer right now its proving to be a difficult task to unlock.
[Galaxy Tab General] edcbabe:
tried this unlock on docomo sc-01c, did not work unfortunately.

there's a guy here in japan that claims he can unlock the sc-01c for 3,000 yen

I will tar my entire system then after he unlocks my GT I will compare files to know what he did :p coz he said there will be no flashing involved.