SemiTether Jailbreak Updated; Incorporates New Mobile Substrate; Much More Stable


Last weekend, BigBoss had released a new package on Cydia called SemiTether, which allowed users to reboot their tethered jailbroken iOS 5 device without the need to connect it to the computer.

However, BigBoss’s solution had some limitations and number of users reported issues after using it. BigBoss has released a new version of SemiTether (v0.91), which incorporates the new mobile substrate by Jay Freeman a.k.a saurik that should make the semi tethered mode more stable.

BigBoss writes:

v0.9.1 incorporates Saurik’s new mobile substrate. Thanks to Saurik, we are entirely rid of all the daemon patching – this means there’s no more daemon patching or restarting. Most the semi-tether work is now done by mobile substrate. The semitether package from the repository now protects your iOS 5 notification center plugins and gives you the option to patch mobile safari so that it will work on the non-jailbreak reboot mode. I’m still looking into patching mail, if possible. 

Here’s the list of changes in the updated version:

1) Much more stable with new mobile substrate
2) Can patch safari so it works in the non-jailbreak reboot mode
3) App to monitor the status of your semitether and reapply. Check after cydia installs.

Semi tethered mode will allow users, especially iPhone users who want to jailbreak their iPhone to at least use it for some of the basic functionalities of the iPhone and now even get to use mobile Safari, instead of the tethered mode where if you reboot the iPhone for any reason it is stuck at the Apple logo, until you don’t tether it to the computer and use Redsn0w’s Just Boot option. Here’s a summary of what you can and cannot do in semi tethered mode with the latest update:

1) Can use phone, sms (text messages)

2) Can use every other stock app on iphone.

3) Can use other appstore web browsers such as atomic web browser

4) Cannot use mail app. You could install a gmail app from appstore or such instead.

5) You cannot use any jailbreak tweak, app, cydia until you boot tethered.

6) While in the semitether booted state, you should not add a jailbreak ios5 notification such as sbsettings to notifications during this state or your device will be stuck in a respring loop until you get home to “boot tethered”.

However a word of caution from BigBoss:

This new version will definitely solve all the flakiness problems we had in the past. However, be aware that this is a total rewrite of mobile substrate. Until this appears in a community source, you are beta testing so installing it is entirely at your own risk.

If you still want to give it a shot then checkout our post on How To Semi Untether Jailbreak iOS 5 Using SemiTether For iPhone, iPad And iPod Touch.

Please don’t forget to let us know how it goes in the comments.

[via BigBoss]

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  • Mykel

    Nice work! “

  • Mykel

    Nice work! Keep it up

  • Tom

    does it still uninstall things like appsync and all that?

    • Ric

      yes, it did!

  • Blue

    Did you get it from Make sure you’re using their latest appsync.

  • Blue

    Yes it does, I have both installed, from the repo. And it loads, and works.
    Direct from
    “Also, with an update from MyWi author and Appsync team, we should be compatible with those, too.”

  • OGT

    Still useless! I’ll wait for an Untether…!

    • Paradox

      Useless if you need appsync… Good if you don’t pirate…. So do wait for your untether quietly little stooge.

      • OGT

        I need appsync all my app and I use a lot mail app, and safari… If u don’t like my opinion please sh*t up…!

        • boricua_561

          good answer!!! people dont have anything else to do just troll around to talk shit about others 🙂
          yea i mean you @Paradox, go suck a cok lmao bitch!!!!

          • Paradox

            Suggesting the work Bigboss puts into helping us common folk is useless is why OGT got the comment he did. Dev_team and others are working hard to get us untether. BigBoss gave us a very valuable tool in the meantime. Calling it useless was trolling in it’s own right. You suggesting I troll is equally the same. Please review many other topics within this forum and you will see my “troll” to “helping others” comments are about 20:1 ration with help being the greater portion of the two.

          • Paradox

            @ OGT …

            A helpful piece of advice.

            If the only reason you jailbreak is to pirate software, then you don’t need to jailbreak. a helpful little tool called iResign and getting a developers certificate for your device will allow you to install whatever apps you want without the jailbreak. That will solve all your issues.

            However if you do use Cydia apps, unfortunately this will not help.

            Bigboss is working on resolving all the issues. Safari does work now with the semi tether. And if your mail is web based like gmail or something, then you can still access it through safari.
            Of course all services will be restored when you get home and run “just boot” with redsnow.

            Its not perfect, but its getting better. People should applaud the work Bigboss is doing while we do wait patiently for the untethered solution.

  • Edg88

    I’m sorry if this seems like a newb question, but will my gevey sim still work if I reserve the baseband? Because I hear conflicting stories and you mentioned that you’re unlocked with gevey sim on iOS 5.

    • Red

      Yes, the Gevey Ultra sim does work on iOS 5 as long as you preserve your old baseband (04.10.01).

  • Ankur

    wen will ios 5 untether jailbreak coming????????????????

  • fas

    So lots of progress being made. Hopefully Apple not launching a software update soon.

  • hi5

    does it work for 4.3.5

  • Maxilus

    Will this work with iPad 2?

    • Paradox

      At the moment no, as there is no IOS 5 jailbreak for iPad 2

      If your iPad 2 is still factory at 4.X (i forget the numbers and too lazy right now to look them up) as long as its NOT the latest which i think was 4.3.10 you still maybe able to jailbreak ipad2 using jailbreak . A big maybe on all parts.

      Dev_team is working on an IPAD2 Iphone4S iOS5 jailbreak.

  • Godfrey

    I’ll just wait for the untethered version just to make sure. Anyway keep up the good work guys and thanks. Btw, Apple is really making it difficult for you guys… ^_^

  • whatever210

    i did the redsn0w 9.9b7 on my iphone 4 with ios 5 update. works great got the cydia going and winterboard. cool. ive heard you can run greenpois0n over it and it will become a untethered. can i run greenpois0n and it work to become untethered or do i have to wait for them to come out with one when they release a permanent solution like for iphone 4s and ipad2

    • Red

      No, running Greenpois0n over it will not make it untethered.

  • Hakan BALCI

    Thanks for your work

  • hitesh

    semitether not working on iphone 3gs ios 5.1.1

  • hitesh

    semitether not working on iphone 3gs ios 5.1.1 pls help