What’s the next best thing to an untethered jailbreak for iOS 5? A Semitethered Jailbreak of course!

Just a few minutes ago BigBoss released Semitethered Jailbreak, a new Cydia package that lets you reboot your iOS 5 jailbroken iPhone at will while away from your computer!

It’s not without it’s caveats, but it’s a whole lot better than a normal tethered jailbreak. Details inside…

To use Semitethered Jailbreak, simply do the following:

Step 1: Tether Jailbreak your iOS 5 device with RedSn0w.

Step 2: Add http://thebigboss.org/semitether to your Cydia sources.

Step 3: Install SemiTether and reboot!

Note: You can also follow our full video tutorial, here.

That’s it. Now you can reboot your iPhone, even away from your computer!

As mentioned, there are a few pluses and minuses though.

  • Phone will reboot to Home screen
  • Can use every stock app on iPhone except Mail and Safari until boot tether
  • Can’t use Cydia, or any jailbreak apps and tweaks until boot tether
  • Phone can take longer to boot

That’s a pretty good compromise, and sure beats having a looping apple logo if your phone happens to crash or reboot while away from the computer.

Let’s just call it really good jailbreak life insurance, shall we? Video coming shortly!

Have you used Semitethered Jailbreak yet? Are you excited?

  • Turbo

    That’s great, I see a good future.

    • Alex

      Can someone please tell me if They have had success with this semitethered jailbreak?

      Does the reboot take long?

      Does iTunes fail as well as safari and mail?

      Any crashes or vulnerabilty to malware or Trojans?

      If everything checks out I will use this jailbreak.

  • Nice.

  • Wma

    Step closer to untethered i hope

  • John doe

    It sounds like a cry out for people to jailbreak so they can start buying cydia apps. Stop working on fail results and focus on a real unteather

    • ricardo

      yeah, so what?

    • Goofygreek

      If your that impatient, why don’t you make an untethered jailbreak?

  • Will the Springboard load when MobileSubstrate is installed?

  • IndiePhoenix

    Sounds quite good, right? 🙂

  • AmpliHelix

    WTF where’s my comment!? Again, it’s hxxp:-slash–slash-thebigboss-dot-org-slash-semitether-slash-

    Replace the xx and -slash- and -dot-

    • Keith


      • AmpliHelix

        Can you NOT read? The original post was edited anyway.

    • keith

      why write out s-l-a-s-h when you can just…nevermind whatever

      • Lupius

        Probably the blog is set up to automatically remove comments with web addresses as spam?

    • Isaac

      -Can’t use Cydia, or any jailbreak apps and tweaks until boot tether” I don’t understand until the boot tether part. Can some1 pls help me?

      • Goofygreek

        Means you reboot your phone using a computer with redsnow that re-enters the jailbreak mode.

  • Keith

    Cydia keeps telling me it can’t find the respositority… Anybody else?

  • Bob Newhart

    Damn, was soo excited seeing the title of this that the 4S might finally have a jailbreak, but still, this is great news, here’s hoping all future tethered jailbreaks can be this forgiving.

  • CrazyBraulz

    This is great!!!

    • CrazyBraulz

      Just wanted to tell people that this tweak was not iTunes friendly with my iPhone. :/

      • tomdotcom

        Yeah. Well spotted. It b0rked iTunes compatibility on my iPhone 4 too.

        It would be such a good tweak if it worked.

        It also messes up your Notification Centre preferences. It’s easily fixed but a bit of an annoyance.

        I have now removed it from my phone.

  • jamesandyori

    If we try this and find it to . . . well suck monkey balls then can it be uninstalled just like any other “tweak” and will the phone be back to just a tethered jailbreak.


  • eric k.

    what does it mean by “boot tethered”?

    • TJB

      It means to reboot the iPhone while it is plugged into your computer by USB.

  • Mr_Teban

    sounds cool, but I rather wait until untethered, I guess I can survive without tweaks a little longer

  • Timothy

    Its been 10 mins after the reboot and it is still booting up. I dont think its even worth it if you have to wait this long.


    • Alex

      Hey Josh is this true?

      So you built a custom ipsw and jailbroke with snowbreeze.

      If so then you have the first untethered jailbreak

    • oss

      ill try this

  • jamesandyori

    Ok I will give it a try and do a tethered reboot.


    Painless and about the same time. I did however loose some tweaks. I will need to look at this further.

  • keith

    this is making my phone randomly reboot and get stuck on apple logo
    ..gotta boot tether and remove

  • ic0dex

    I think no dev is going to reales a untethers jailbreak for iOS 5. I think apple is going to update in the next 2 weeks and that’s when we will se a untethers jailbreak.

  • Jacksparrow

    This look like a good first step but dont look good enough for mainstream consumption. I think these hackers and geeks should focus all their attention in untutored jailbreak like limera1n and jailbreakme.com. Now those are impressive.

  • I’d watch out for any low level fix like this that isn’t first vetted by Saurik/BigBoss. I’m not saying this one does anything bad, but any mod like this can modify main core files without using mobile substrate and you may be worse off than when you started – And removing them can be a pain… So unless you really need this, just know what you could be doing more harm than good.

  • Brett

    Doesn’t work on iPod Touch 4G

  • LS

    Its not working at all on my 3gs , stuck on loading circle and if boot with computer it shuts down after some seconds :S can anybody help?

    • denbako

      i am using redsnow 0.9.9b7 for win user…using apple stock ipws.
      its works

  • Jenn

    For the very first time, I jailbroke my iDevice. My phone is the 3GS. It’s been jailbroken for 24 hours and I do not feel impressed with it at all. Am I just a newbie and can’t see the worth of jailbreaking? Any comments? I may restore unless anyone can change my mind. Idk what I’m doing.

    • Barney

      Nobody cares if u keep jb or not. If you can’t see the good things about jsilbreaking you obviously don’t know enough about it.

      • laziepig


      • Edincotizer

        Jailbreaking allows you to install apps that don’t exis in the AppStore. Run Cydia and you might find stuff you like.

      • Edincotizer

        Jailbreaking allows you to install apps that don’t exist in the AppStore. Run Cydia and you might find stuff you like.

    • Elnegrocab

      Go to cydia, download installous 4, open installous an configure it to install automatic. Then you can download any app or game 4 free. Enjoy it!!!

    • tomdotcom

      Get Bite SMS (way better than the Apple SMS app), get SBSettings and get Activator. Activator will let you use different actions to open apps. You can configure it so for example dragging you finger down from the top of the screen will open SBSettings. Or so shaking your phone will open it. Double tap the home button? Use the volume buttons? Pretty much any action can be used.

      I used to have a downward swipe (from the top of the screen down) to open SBSettings. In SBSettings you can switch airplane mode on or off, Wi-fi on or off, data on or off, location services, 3G… and others. It’s quicker and easier than going into Settings and doing it. Enjoy!

    • Soliz53

      Go to YouTube and search on what cool things you can do with it. Come on all free apps enought said.

  • cbee

    Doesnt wolrk on 3gs…this shit wack

    • cbee


      • LS

        Friend are you using ultrsn0w to unlock your iPhone?

  • LS

    Nevermind , i was lost signal but i got it back .

    I don’t know if its my iPhone problem but its not working at all in 3gs

  • jamesandyori

    Ok I was stuck in a loop and was able to tether boot and delete the file again.

    Ugh, what a pain in the ass!

    Oh well it was fun anyway!

  • denbako

    its work ……tks bro

  • denbako

    i am on iphone 4 ios5 …..its really work……better than nothing

  • denbako

    i am using redsnow 0.9.9b7 for win user…using apple stock ipws..

    • oss

      what do u mean by “using apple stock ipws”

      • Denbako

        Download from iTunes ……update software iOS 5

  • Mindy

    Ultrasnow didnt work for me. Redsnow so much simpler. I got my iphone 4 off ebay And they upgraded before shipping it and baseband updated ugh! No unlock for 4.11.08 baseband. However, my 3gs oldbootrom is loving ios 5 untethered. Id still rather have the 4 unlocked anyday.

  • Jorge

    CaN they do something like the psp cfw scene, like, put. an app, that boot tethered right on your iPod/iPad/iPhone ? Is it possible?, like fr a example, jailbreak you iPod using tethered, later, install an app like ‘TTB’ or something like that, that, put the device in dfu, exploit limerain, and jailbreak your device? my mind is a lot crazy, so, if it possible, I’m gonna try it. :-/

    • kokhean

      It’s like a custom firmware enabler. Good idea, but it’s hard to code. Custom firmware for the PSP went dead for months after the 6.00 firmware was released, but it was recently more activity.

    • kokhean

      there* was

  • great news, anyone know great gmail app? mail is what i rely on for untether 😛

  • Dino

    Hey Jeff. I tried jailbreaking my 3gs using redsnow. But when it rebooted, the Cydia app crashes amd so does Safari and Mail. It seems like i got a semi tethered jb. But im trying to totally jailbreak it. Do you know whats wrong? Need help!

  • Britta

    It’d be very helpful to note in the main post that this is a beta (experimental) semitether, and to link back to the official post about it from BigBoss – thebigboss.org/semitethered-jailbreak – so that people can read all the details and find out more about reporting issues.

  • I installed the semitethered but i am stuck at the circling wheel and it won’t turn on, is it not compatible with some tweaks? all i have installed is Gridlock and barrel

  • yellowsn0w

    doesnt install semi-tether.
    “sub-process /usr/bin/dpkg returned an error”

    what should i do??


    • Gustavo C

      Me too…


  • d0ntp4n1c

    works for me but it removed installous. Will it harm things if i re-install it?

    • d0ntp4n1c

      Cant reinstall Installous or AppCake. Removing this and just gonna wait for untethered v.v

  • Nilesh

    Guys i had problems with iTunes…..Does not allow me to connect my iPhone 4 ….give me some 0XE80000 kinda errors….removed it and then voila my iPhone got connected to iTunes…hope a fix comes out soon

  • tdecker363

    Yeah, appsync is removed and cannot be reinstalled with this. Is this an anti-piracy movement, or does appsync legitimately use a daemon or something that conflicts with the semi-tether?

  • farshedricky

    it works just as normal iphone in my factory unlocked 3gs i dint hav to install semitethered … grEATTT!!

  • cfg

    Seeing Random loss of 3G data.. A respring brought it back once, second time respring got stuck and had to hard reset.. Semitether saved phone function, but the random loss of 3G data isnt going to fly..

  • I am pretty excited for the release of the Semi – Tethered Jailbreak iOS 5.1. However, I get a little carried away with my jailbreak and start to download every package possible, resulting in me restoring from an icloud backup. However, I will continue to do the jailbreak, however my iPod will probably be unjailbreaked in a couple of days :/

  • I installed this and rebooted my iPod, when it finally rebooted I was still able to use every jailbreak app, tweak and cydia. Is that normal?