Unlock iPhone 3GS / 3G iOS 4.2.1 with UltraSn0w 1.2

UltraSn0w 1.2 is out to unlock iPhone 3Gs/3G iOS 4.2.1. This guide is on how to unlock iPhone 3GS or 3G iOS 4.2.1 baseband 006.15.00 with UltraSn0w. iPhone 3GS / 3G unlock instructions can be found below.

IMPORTANT

  • Your iPhone 3GS or iPhone 3G must already be jailbroken.
  • For baseband 05.14 or 05.15 your need to update your baseband to 06.15.00. (How to jailbreak and update baseband 06.15.00).
  • This UltraSn0w update can unlock baseband 05.13.04 or older too.

NOTE: This is NOT for iPhone 4 users. iPhone 4 unlock will take some more time.

Disclaimer: This guide is for information and educational purposes only. Use it at your own risk. we cannot be held responsible if anything goes wrong. *** Some users are reporting WiFi, GPS and battery drainage issues after jailbreak and unlock.

Let’s unlock iPhone 3G or iPhone 3GS running iOS 4.2.1 or 4.1 with UltraSn0w unlock.

How to Unlock iPhone 3GS/3G with UltraSn0w

***T-Mobile USA users please disable 3G network first. (Settings >General >Network and turn the “Enable 3G” switch to OFF.)

Assuming that your iPhone 3GS/3G is already jailbroken on iOS 4.2.1/4.1

  • Open the Cydia.
  • Go to manage Tab at bottom.
  • Hit the big Sources button.

unlock iphone 3gs / 3G iOS 4.2.1

  • Hit the Edit button on Top-Right
  • Then Hit the Add button on Top-Left
  • Then Enter the following URL: http://repo666.ultrasn0w.com and hit the Add Source button.

unlock iphone 3gs / 3G iOS 4.2.1

  • Once the Source is added to the Cydia, hit the big return to Cydia button at bottom of the screen and then Done button.
  • Go to Search tab and search for ultrasn0w and install it.

unlock iphone 3gs / 3G iOS 4.2.1

Installing UltraSn0w will unlock iPhone 3GS or iPhone 3G iOS 4.2.1 with baseband 06.15.00. Once the installation is completed, reboot your iPhone.

Voila! You have unlocked iOS 4.2.1 on iPhone 3GS/3G baseband 06.15.00 with UltraSn0w and can use SIM from any carrier now.

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102 comments… add one

iSteve Hacker Jobs November 29, 2010, 6:36 am

Go ahead beyond apple with iphone/baseband 6.15.xx (why not 7.16.xx), what if tomorrow apple highest baseband for iphone only 6.14.xx then what…

I am not that smart so I’m waiting for GEOHOTz about Limesn0w

bernek November 29, 2010, 6:54 pm

You will wait forever then LOL

renabrasa November 29, 2010, 7:09 am

pawnage tool 4.1.3 update my baseband 05.13 to 05.15 ? i have an iphone 3G .

latium November 29, 2010, 7:10 am

iPhoneheat reported on October 14th that Sherif Hashim has found a new exploitable crash in iPhone baseband which may lead to and unlock for iOS 4.2 and iOS 4.1 Baseband 05.14.02 and 02.10.04. I’m just curious to know what happen to it.

iSteve Hacker Jobs November 29, 2010, 12:14 pm

GEOHOTz is better than Sherif Hashim in unlocking. don’t guess me wrong here.

AfRoO December 2, 2010, 3:27 pm

man there’s no better and bad, both is doing jobs we couldn’t made, but
let’s say Geo is better so where’s HIM now???

Peter November 29, 2010, 8:16 am

Yea, good question… Huge disappointed for iPhone 4 users.. :(

Dmitriy November 29, 2010, 8:33 am

How about 05.14.02?

Jules_f November 29, 2010, 1:33 pm

Hi I think you have no issues with 05.14.02 since in this article they are saying ” This UltraSn0w update can unlock baseband 05.13.04 or older too”

jax November 29, 2010, 9:18 am

lets see if you can help me, i have a 3GS, new bootroom, firmware 4.1 with its baseband, can i use redsn0w without going to 4.2.1 or upgrading baseband???

most November 29, 2010, 11:56 am

hi

i have same thing with bb 5.14 i’m scared
to update it to 4.2.1 !!!

so can i unlock it without update??

zigen November 29, 2010, 3:32 pm

i manage to unlocked and jb my iphone 3gs (new bootroom) 4.1/ bb 5.14.02. i DID NOT upgrade my ios to 4.2.1. just download iPhone2,1_4.1_8B117_Restore & Redsn0w 0.9.6 Beta 5.

1) run redsnow then browse to iPhone2,1_4.1_8B117_Restore. (why 4.1? because that’s the CURRENT FIRMWARE OF MY 3GS) then it prompted “is this a newer version of 3gs, click YES. then just follow the instructions. after this bb update, use ultrasn0w via cydia to unlock ios 4.1

jax November 29, 2010, 8:41 pm

thanks for your answer, thats what i thought on the first place, ill get my brothers 3gs today to make it work with this unlock situation.

ill stay on 4.1 with this whole thing about mixing ipad baseband on iphones firmware.

slik4u2 November 29, 2010, 8:56 pm

@zigen can i do the same too?

Lezanz November 30, 2010, 1:22 pm

Any GPS issue? Mine not working

kenzo November 29, 2010, 11:12 am

i have a 3gs 4.1 5.14.02 , bootloader 6.4 new bootroom…can i use redsnow or l1merain to jb and UltraSn0w 1.2 to unlock?

tonz November 29, 2010, 2:04 pm

Hi, I am a new entry in this topic, not so expert….please help me ….
CAN I UPGRADE AND UNLOCK WITH ULTRASNOW 1.2 ???

my iphone 3gs baseband 05.12.01,
Ios version 3.1.3(7e18)
is already jb.

plz answer mi thanks a lot….

zigen November 29, 2010, 5:33 pm

no need to update ios. you can jb & unlock with your current ios 3.1.3 with bb 5.12.01. yes you can unlock it using ultrasn0w

zigen November 29, 2010, 5:35 pm

updating to ios 4.2.1 will also update your bb to 5.15 which atm is a tethered jailbreak/unlock means you have to connect to a pc everytime your phone reboot or maybe ran out of batt/ accidentaly you switch off your phone

AfRoO November 29, 2010, 2:24 pm

Hey
The Dev-Team has updated redsn0w to version 0.9.6beta5 for unlockers. Below is all the info.

Update #2: The new redsn0w 0.9.6beta5 is out. It gives both Windows and OSX users the ability to flash the iPad 06.15 baseband on iPhone3G or iPhone3GS. It fetches the baseband files directly from Apple for now (the only IPSW you ever point it at is the stock IPSW for the FW on your iPhone right now). There may be a long delay while it’s doing this (their servers are currently getting pounded).
windows user :http:// sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.6b5.zip?attredirects=0&d=1

OSX user: http:// sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.6b5.zip?attredirects=0&d=1

If you do flash your baseband via redsn0w, please keep it plugged into USB the whole time. You don’t want your battery to die during the flash process!…

hope fully for iPHONE-HEAT to give u more info

Good luck,

zigen November 29, 2010, 3:39 pm

THANK YOU SO MUCH DEV-TEAM & IPHONEHEAT!!! :)

i manage to unlocked and jb my iphone 3gs (new bootroom) 4.1/ bb 5.14.02. i DID NOT upgrade my ios to 4.2.1. just download iPhone2,1_4.1_8B117_Restore(IOS 4.1 FW) & Redsn0w 0.9.6 Beta 5.

1) run redsnow then browse to iPhone2,1_4.1_8B117_Restore (w/c you downloaded).(why 4.1? because that’s the CURRENT FIRMWARE OF MY 3GS) then it prompted “is this a newer version of 3gs, click YES. then just follow the instructions. after this bb update, use ultrasn0w via cydia to unlock ios 4.1

slik4u2 November 29, 2010, 5:59 pm

@zigen,did u update to 6.15.00 to unlock it

bernek November 29, 2010, 6:56 pm

ofc he did otherwise no unlock.

lucky November 30, 2010, 8:22 am

dude..i have an iphone which is currently running on 4.1 os..so again ‘ve to update to 4.1 through redsnow?? pls guide me throu’

lucky November 30, 2010, 8:39 am

and one more question,are you experiencing any kind of problem like wifi/GPS not workin?? cuz thats the problem most of them are facing..if possible,send me ur email id cuz i wanna chat nd get info before i unlock/jailbreak.

Tim Smith December 1, 2010, 12:25 pm

I have the same problem weak WIFI / No GPS

Nuno Neves November 29, 2010, 4:32 pm

For Iphone 4. Any idea when it’s gonna be out???

Dearsami November 29, 2010, 5:41 pm

I’m stuck on ultrasnow. repo666.ultrasnow.com is not opening in cydia. Is there any alternate of getting ultrasnow???

slik4u2 November 29, 2010, 6:26 pm

@dear,let me knw when u succesfuly unlock

AC7 November 29, 2010, 7:11 pm

its repo666.ultrasn0w.com not repo666.ultrasnow.com, its a 0 (zero) not a o. ok?

alanzaki073 November 29, 2010, 8:14 pm

It is spelt as ultrasn0w…zero”0″ is used not “o” for owl…

TCL November 29, 2010, 5:47 pm

Hi I have a 3G. Because I was running on 5.14.02 I had to upgrade to 4.2.1 and then used ultrasnow to unlock. I’m not that technical so simply followed the directions. My 3G is unlocked now but having battery issues. In 3 hours my phone went from fully charged to dead.

Anybody experienced similar issues?

slik4u2 November 29, 2010, 5:53 pm

plz i this working for anybody.someone plz confirm

dansmith November 29, 2010, 6:01 pm

Share my finding with you guys.
Before I try to upgrade to iOS 4.2.1, my iPhone 3G was jailbroken and unlocked at iOS 4.02 and baseband 5.13.04.
Before I install iOS 4.2.1, I did a backup of iPhone.
Then I just installed iOS 4.2.1. At first boot up after updating to iOS 4.2.1, I did notice lost of connection to my phone network. Then simply followed suggestion from iTune (v10.1.0.56) to restore my previous backup.
After restoring the backup, the phone is back to unlocked state! (I made phone calls successfully) And I checked the baseband is updated to 5.15.04.

tarekelmalah November 29, 2010, 6:17 pm

Hello, im having problems , i got the 1015 error how the heck can i get out of it ?!

Ricardo Tavares November 29, 2010, 7:02 pm

Hey guys, thanks for the infos!
I´ve a iPhone 3g running ios 3.1.2.
Can I update to 4.2.1 without updating the baseband and still unlock my phone?

Thanks

G.S.Bedi November 29, 2010, 7:06 pm

Hi. I would like to take this 6.15 baseband of iPAD unless some body assures me that my phone’s battery performance , speed will improve with iOS 4.2.1.

I need not to update to future iPhone OS(s) if my iPhone (3G 16GB-running on 4.0.2) gets back to normal speed and all over performance.

Did any body try 4.2.1 ? Is it bugs free ? ?

Please share your experiences !

Thanks & Regards.

jerry December 5, 2010, 9:28 am

Better not trying to upgrade to baseband 06.15.00 – I already bricked my iPhone 3G! Now it is in recovery mode FOREVER. Don’t know why those guys developped something but they cannot roll back. They do have warnings, but when someone else tells you how to jailbreak it, it didn’t come up with the warnings.

darsh November 29, 2010, 7:07 pm

thanksssssssssssssssssssssss

maximAk November 29, 2010, 7:41 pm

Now sure what I am doing wrong but I’ve tried to update the baseband with redsnow, I am using 4.1 4.15, but after trying three times I am getting nowhere. At first, since my iphone 3G was jailbroken with snowbreez, I thought that I needed to have the original OS on the phone so I did the restore to 4.1 not altered by snowbreez. After that I have followed the steps to update the phone but it is getting stuck during the unload ramdisk process. Can someone tell me what I am doing wrong. Do I need to upgrade to 4.2.1 in order to get it to work.

wynnter February 7, 2011, 11:35 pm

well i have been without my iphone for two month i just updated to 4.2.1 and used redsn0w 9.6b6 and unlocked my 3g in less than an hour

latium November 29, 2010, 7:58 pm

This is my opinion, this unlock method is not the best one, the reason why I don’t like the fact that we are forced to update the BB to 6.15.00 and take all the consequences with it, if you read the risk from the Dev Team you will understand it better, this is a trip of no return, so I want to share my opinion with you don’t do this unless you really need to, for now I will stay away from this method and hopping in the future with better option.

By Dev-Team – YOU DO THIS AT YOUR OWN RISK! PLEASE UNDERSTAND THE CONSEQUENCES OF UPDATING TO 06.15.
1. There is no way to come back down from 06.15, and there’s no hiding the baseband version from Apple. You’ll be voiding your warranty in a very obvious way.
2. If some future baseband comes out with a critical fix, you won’t be able to update to it if it remains down in the 05.xx sequence (then again, you wouldn’t update to it if you wanted to keep your unlock anyway).
3. Starting with FW 4.2.1 if you have 06.15 on your iPhone you won’t ever be able to restore to stock firmware (it will fail). You’ll need to only restore to custom IPSWs (then again, if you’re unlocker you should already be doing that).

WARRAICH November 29, 2010, 8:05 pm

ISN’T THERE A WAY TO UPGRADE TO iOS 4.2.1 *WITHOUT* UPDATING THE BASEBAND FROM 5.13 TO WHATEVER COMES ALONG WITH iOS 4.2.1??!

UPDATING BASEBAND TO 6.15 sounds A LOT scary ONCE U READ THE WARNING…..

maximAk November 29, 2010, 9:21 pm

If I have an iphone 3G running 4.1 which was previously jailbroken with snowbreeze 2.1 how can I get it unlocked. I did try updating to 6.5 with redsnow but it didn’t work. Is there any other methods by which to do it. One other thing, if I do have upgrade to 4.2.1 and showbreeze won’t able to jailbreak it, I think I wouldn’t be able to activate the phone since I do not have an ATT SIM card.

alanzaki073 November 29, 2010, 11:08 pm

Have my 3GS[new bootrom, ios4.1, bb 5.14.02] updated to bb 6.15 and unlocked..
I’m still on ios 4.1, as ios4.2.1 is a thethered jailbreak(you don’t want that for sure)
My idevice:- jailbroken and unlocked and i’m using the sim Of my choice( any carrier).
just follow the instrctns of red snow 0.9.6 beta 5, and your sure to excel..
thanks a lot for Ultrsnw 1.2 & rdsnw 9.6b5…
done all this on win7/32 bit..
Actually commenting this through my iphone…
cheers mate

Dearsami November 30, 2010, 12:27 am

Hi guys, i ws on 5.14 with iOS 4.1
I updated bb to 6.15 then
I had a problem with repo666.ultrasnow.com
Which is blocked from etisalat in Dubai.
I just used du instead of etisalat, n it works for me.

Thanks to unlocks.

Kevin December 12, 2010, 11:45 am

How did you make the unlock work?
I live Abu Dhabi. So I updated the bb and when I tried to add ‘repo666.ultrasn0w.com’ it says Repository not found!

Please HELP!

fahdajmal November 30, 2010, 1:24 am

I have iPhone 3GS baseband 05.15.04. i upgraded from 3.1.3 to 4.2.1 and did a jail break with redsn0w. so far so good. i tried to unlock using the ultrasn0w but it doesn’t work. rebooting the device is also not successful in un jailbroken mode and the screen is stuck at the apple logo. the device doesn’t turn off or on. its stuck and i’m stuck.. please help.

cephalopod February 14, 2011, 6:45 pm

I have same spec/versions as you.

Redsn0w is tethered jailbreak, which is why you’re getting stuck at boot time. Either use Redsn0w and “just boot tethered” for now, or Greenpois0n-rc6 for untethered jailbreak.

It seems Ultrasn0w 1.2 doesn’t unlock baseband 05.15.04.

ranjan December 1, 2010, 5:15 pm

it works 100%

nafees mansoor December 2, 2010, 1:24 am

i hv a 3gs with bb 5.14. i’m in a fix to unlock my iphone according to the ultrasn0w’s guideline as i hv to shift the bb to 6. and its a high risk issue. i guess making the bb to 6 will violet the apple terms. plz help me out guyz.

nafees mansoor December 4, 2010, 6:08 am

finally i hv done it :) thx iphoneheat 4 the clue!!!

RandalStevens December 31, 2010, 7:57 pm

So what the clue? I am in the same situation and I’m trying to avoid having to update to 6.15. Is there any way?? Thanks!

SadiqAlqatari December 2, 2010, 12:07 pm

Ultrasnow 1.2 did not work ti unlock iphone 3g with Baseband 5.15.04….! any other scape to resove this issue and how long we need to wait for the next unlock.

is it a game we have to play?????

most December 2, 2010, 3:09 pm

hi all

how is every thing ??

i tried to download on my 3gs ios 4.1 bb 5.14 but when i enter the source and try ro download i get the old redsn0w 1.1 not the new one 1.2 ??

i don’t want to upgrade it becouse of risk to unable to unlock it

someone can help please ??

mepaki December 4, 2010, 12:48 am

I am trying to jailbreak with redsnow, but will not find IPSW file , where i can find IOS 4.2.1 with ipsw

Lucky December 5, 2010, 6:12 pm

my iphone 3gs is successfully activated and unlocked running on 4.1os…pls do it on 4.1 and not on 4.2!!! Its successful!!
Thank You guys..

most December 8, 2010, 3:25 am

hi there

what did u do tell us plzzzz

AfRoO December 6, 2010, 4:20 am

Guyz your iPHONE 3G/3Gs Stuck on Recovery Mode after Upgrading to iOS4.1/4.2 Baseband 6.1.5??
it’s okey, Text me I have the solution.

facebook.com/AhmedAfRoO

catch yea there

Osuagwu1 December 7, 2010, 11:01 am

Please help me my iPhone 3gs 4.2 bb 16 stock in apple

AfRoO December 8, 2010, 12:44 pm

text me on

(( FACEBOOK.COM/AhmedAfRoO ))

Catch yea there

kyriakos December 7, 2010, 2:41 am

Facing a problem also,after unlock iphone stuck on connect to itunes

Deeellon December 7, 2010, 4:45 am

Man all this shit just fucked me over and my iphone 3gs over. I jailbroke it at 4.2.1 with 6.15 baseband and now its stuck at logo AND recovery mode. You guys really need to find a solution for this. For everyone else that is reading this DO NOT I REPEAT DO NOT JAILBREAK YOUR IPHONE ON 4.2.1

Wardak December 7, 2010, 6:41 am

Please do not upgrade to 4.2.1 you will lose your GPS signals after jailbreaking, if you jailbreak your iphone on 4.1 firmware, you will not lose your GPS signals.

Will December 8, 2010, 5:50 am

Hey so I used pwnage tool to create the custom fw thing but when I go to try and put it on my phone i just get a message right away that says that my phone is not eligible for that upgrade it’s in dfu mode and all I just can’t even put I on, does anyone else have this problem?

pinito4529 December 8, 2010, 9:24 am

any news in the unlock version for iphone 4? with the latest BB?
thankyou guys for the great work you do!

Kevin December 10, 2010, 3:47 am

I can’t unlock my iPhone 3G on 4.2.1. Every time I try to add the source ‘repo666.ultrasn0w.com’ it says repository not found!

Please HELP =(

warlock666 December 19, 2010, 4:41 pm

Ok so, i jailbreako my iphone 3gs old bootroom using redsnow and unlocked it using ultrasnow…everything is perfect…..
only that whenever i sync apps ……it says suncing and updating whatever…and at ehd it says sayn cdone…BUT apps are not getting synced to my phone…..i googled the problem and it seems every damn person is having the same problem…
:(

mikeez December 19, 2010, 9:18 pm

my iphone 3gs .related on other disscus..
my iphone won’t turn on.! i restore it> but it’s getting error.! when i turn on… always appearing the apple logo and suddenly appearing connect to itunes..
what do i do.. HELP!HELP! HELP!.ME PLSZZ..!!!!

iPhoneHeat December 20, 2010, 12:11 am

get a custom iOS 4.2.1 and use it to restore 3GS.. or do you have SHSH blobs saved for an older firmware?

mikeez December 19, 2010, 9:20 pm

MY IOS IS 4.2.1 bb 06.15 > and it’s newly unlocked.

wayan December 23, 2010, 12:03 am

sorry may i know how u got ultrasn0w 1.2???cz i try to get it in UAE still block,,help me!!

Cino December 19, 2010, 10:10 pm

Hi guys, any idea of when unlock for iphone 4 baseband 02.10.04 will be available?
Appreciate your answer.
Thanks

iPhoneHeat December 20, 2010, 12:09 am

no ETA

Qof December 22, 2010, 9:08 am

I have a jb (limerain) 3GS 4.1 @ bb 5.14. Is there a unlock other than going to the ipad 6.15? Losing battery & GPS doesn’t sound worth it.

iPhoneHeat December 22, 2010, 10:16 pm

nope… atleast for now

Qof December 29, 2010, 4:32 am

What if I update to 4.2? Is there an unlock there that won’t have the gps & battery loss?

wayan December 22, 2010, 11:56 pm

hey guys,,,,i have some problem,,i cannot get ultrasn0w cz i am stay in UAE any link or site can help me to get this???plzz i need ur help!!!

wayan December 22, 2010, 11:58 pm

just for imormation i want ultrasn0w 1.2 iam stay in UAE thankz before….

Qof December 29, 2010, 4:43 am

Peeps who have gone to 6/ipad: Have the gps & battery issues been fixed?

ni_rajan December 31, 2010, 10:57 am

i have o iphone 3gs with firmware 4.2.1 and baseband 05.15.04 .i couldnt unlock it . plz help me out to unlock

Ip. January 11, 2011, 7:03 am

Hi guys,
I have an Iphone 3G running on version 3.1.2 (7D11) and on modem 05.11.07
I jailbreaked and unlocked my iphone when I bought it (used) more than a year ago… I don’t know anything about that; i don’t even care for the jailbreak, i just wanted to use my cell phone with another company and I followed what I saw on the net with Blackra1n and Cydia…
But now I’d like to update it to version 4.2 but I don’t know if i’ll be able to use my phone after that…
Is it possible to unlock it without jailbreaking it?
How do I do that?
Do I update with Itunes and then unlock it?
Will everything on my phone will be lost? (contacts, pictures, music, apps…)??

Thanks for helping me!

lenjung February 16, 2011, 1:55 pm

My phone is running on ios 4.1 with the 6.15 baseband. If I update my phone to 4.2.1 will it change the baseband or will it keep it on 6.15?

ely February 27, 2011, 10:45 am

I updated my iOS firmware to 4.2 and my baseband is now 6.15.00. I was able to jailbreak my iphone and installed ultrasn0w successfully. However, my iphone can’t still recognized my other sim cards from other networks. Can someone help me with this issue? There’s always a pop up on my iphone that no sim card is installed.. Thanks in advance.

ely February 27, 2011, 10:47 am

I updated my iOS firmware to 4.2 and my baseband is now 6.15.00. I was able to jailbreak my iphone and installed ultrasn0w successfully. However, my iphone can’t still recognized my other sim cards from other networks. Can someone help me with this issue? There’s always a pop up on my iphone that no sim card is installed.. Thanks in advance. More power.

ely February 27, 2011, 11:14 am

I ran my red snow jailbreak not by “run as administrator”. I just simply open it. What will be the results or problems I will encounter on my iphone when I ran the redsnow not by “run as administrator”? I am thinking this might be the reason why my phone can’t still recognized another sim even after jailbreaking with redsnow and unlocking with ultrasnow. Please help. Thanks in advance.

revetwelch March 5, 2011, 12:44 am

I have an iPhone 3G – 4.1 – baseband: 05.14.02
I JB it with redsn0w 0.9.6rc8 (not sure for the last digit).
In this article it is said:
“Assuming that your iPhone 3GS/3G is already jailbroken on iOS 4.2.1/4.1″
Can someone confirm I can use UltraSn0w 1.2 to unlock my phone ?
Thanks

iPhoneHeat March 5, 2011, 5:44 pm

read the important part.. and I don’t recommend updating baseband to 06.15.xx

revetwelch March 7, 2011, 11:31 pm

Yes I read the limitations, and am ready to accept it.
I just want to know if this UltraSn0w 1.2 will unlock my iPhone 3G – 4.1 – baseband: 05.14.02.
Anyway, that is the only solution I found around to unlock it.

iPhoneHeat March 8, 2011, 6:30 pm

baseband to 06.15.xx >> Yes
baseband to 05.14.xx >> No

mo1z814 August 8, 2011, 2:10 am

use a custom firmware with sn0wbreeze and ireb then just install ultrasn0w after that. simple and works. if you get no service bars then you must enable then disable airplane mode and wait. if still no hope disable 3g and then turn airplane mode on/off and wait for the magic bars

marco November 18, 2011, 11:47 am

i have an iphone 3G FW 4.2.1 Baseband 6.15, but unable to unlock via redsnow.. can you send me a procedure from jailbreaking and what versions of redsnow shall i use..
thanks..

iPhoneHeat November 18, 2011, 4:47 pm

http://www.iphoneheat.com/2011/10/jailbreak-ios-5-with-redsn0w/
Steps are same for 4.2.1 except it’s untetehred for 4.2.1… which means no need to tether boot..
then unlock with UltraSn0w

marco November 19, 2011, 2:13 pm

but the thing is even i follow the steps how to jailbreak then unlock, still it is not successful. do you have any idea on what is the probable cause why after unlock via ultrasnow, still no signal from carrier.

iPhoneHeat November 21, 2011, 11:31 pm

reflash the baseband with RedSn0w

bamrocks2 March 20, 2011, 1:21 am

i jailbroke my iPhone 3gs runnig iOS 4.2.1 with ultrasnOw and i put in my tmobile sim card and it just says searching i turned of 3g what do i do?

ajaysidhu October 6, 2011, 11:21 am

hey, i got a iphone 3g firmware 4.1 with baseband 06.15.00 i already jailbreak my iphone with redsn0w on windows and now i am trying to install ultrasn0w to unlock it. The problem is that my iphone can connnect to my wifi, the bars are full but it cant connect on anything. even on safari, any help to solve this would be apreciated.

artel August 6, 2012, 6:43 am

funciona al 100 prueben varias veces

freddy April 1, 2013, 3:15 am

gracias muchas gracia Dios les bendiga.

samir April 15, 2013, 1:03 am

iphone 3g on 4.2.1 ipad baseband but wont unlock, any ideas?

white_looloo August 4, 2013, 3:19 pm

hi i have iphone 3G lock with iOS 4.2.1 baseband 006.15.00 but my wifi doesn’t work . i download ultrasnow and AppSync42 and copy in /var/root/media/cydia/autoinstall with itools but wont unlock plz help me !!!!

Arancia zzorre April 9, 2014, 5:37 am

Thank you very much……….. its working…… thanks again

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