Turn your Tethered iOS5 Jailbreak into a Semi-Tethered iOS5 jailbreak with SemiTether (Tutorial)

It's no secret, one of the most inconvenient things about a is that you are prone to having a useless device when you are away from your computer. Whether you lose power, the phone spontaneously reboots or you accidentally install a Cydia package that requires knowing, the risk of getting stuck in a boot loop when you're away from your computer is enough to prevent many people from jailbreaking on .

Luckily there is a band-aid fix for this problem. It is a new Cydia package called SemiTether which will allow you to reboot your device without the need of a computer! Of course, this is not the same thing as an untethered jailbreak since you won't be able to use Safari or the Mail app or any Cydia apps for that matter. BUT, you WILL be able to use essential apps like phone, ipod and SMS! This is great news for those who want to jailbreak but the possibility of not being able to use their phone while they are away from their computer was preventing them from doing it.

Things you should know:

  • You'll be able to use phone and sms (text messages)
  • You'll be able to use any App store apps on your device
  • You WON'T be able to use Safari
  • You'll be able to use other appstore web browsers such as "atomic web browser"
  • You WON'T be able to use the mail app. You could install the gmail app from appstore if you use gmail
  • You WON'T be able to use any jailbreak tweaks, apps or cydia until you boot tethered
  • While you're in the semitether booted state, you should not add a 3rd party ios5 notification system such as sbsettings or your device will be stuck in a respring loop until you get to a computer to “boot tethered”

So, without further adieu, this is how you install SemiTether on your device:

Step 1: Obviously for this to work you must be running iOS5 and have a tethered jailbreak.

Step 2: Open up Cydia and hit the "Manage" tab at the bottom. Then click "Sources" and hit "edit" in the top right corner and then click "Add" in the top left corner. In the URL field enter the following

http://thebigboss.org/semitether

Step 3: After you have added the source, go into the search tab and search for and install the "SemiTether" package.

Step 4: After the installation is finished go ahead and reboot your device. You will now notice that you can boot to your springboard even without booting tethered! Remember that you will still need to boot tethered if you want to use Safari or Mail or any of your Cydia apps, but this is a great fallback for those who don't want to have a completely useless phone without booting tethered.

This is a very new technique so of course there may be some glitches here or there, but it's much better than not having access to your phone if your device reboots. Please post in the comment section below if you run into any issues so we can help you out.

  1. The device will take longer to boot up. When you reboot, it has to reload every service. It will respring a couple times also.
  2. According to Saurik, there are some “problems” to reloading all daemons on the fly. This is why mobile substrate installation requires “reboot device” in cydia. I have not experienced any of these problems, but I am not promising they do not exist. This is why we will need testing to see which problems may occur.

Did you find this tutorial useful? If so, please consider donating below, thank you!
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  • Nicholas

    So lets say your iphone dies.. Will this pretether take over if you connect it to a charger? and boot into semitether?

    • http://iphoneblogr.com JaeM1llz

      Yes, that is correct.

  • http://www.kcajbr.net KcajBR

    This will NOT work with appsync or Instalous 4. So you msut choose each one you want to have Semi-tether jailbreak or Instalous 4.

    • http://iphoneblogr.com JaeM1llz

      As stated in the post, you will not be able to use ANY Cydia applications while in a semi-tethered state. Also, we do not support piracy here, please do not mention it.

    • Salah

      If you want work with appsync, so you have already a computer, so do a thetered boot.
      Nice one but I won’t update to iOS 5, I need more infos about its baseband

      • http://iphoneblogr.com JaeM1llz

        Again, we do not support piracy here, please do not mention it.

        • Nicholas

          I appreciate your tutorial :) thanks btw

  • krisy0uk

    Is anybody else having problems with winterboard correctly theming all apps after installing? I know i am!

    • http://iphoneblogr.com JaeM1llz

      Yes, everyone is, Apple changed a lot of the image filenames in iOS5 so it will be a while for the theme developers to update the themes. For now I would search google for themes that were developed or updated specifically to work with iOS5.

  • iaTa

    I like your site but I do have to laugh about you piracy statements when you have whole news articles about Siri being ported to other devices. Do you not think that involves piracy of the Siri application? Of course it does.

    • http://iphoneblogr.com JaeM1llz

      Are you part of the team working on the port? We don’t know how the port will be achieved yet, it is quite possible that you will be able to port Siri without the use of piracy.

      Also, porting part of a firmware that is freely available to iOS users and restricted to only one model of the iPhone is in more of a gray area when it comes to piracy, whereas stealing paid applications from developers is flat out illegal.

      We are not asking that you agree with the rules, but we do ask that you abide by them.

      • iaTa

        No I’m not part of the team and I’m not questioning your policy on piracy which I fully agree with. I’m merely pointing out that Siri being ported to other phones is by its’ very definition piracy. The software is licensed for 4S owners and 4S owners only. Thus there is no way a port can be classified as legal.

        • http://iphoneblogr.com JaeM1llz

          If the files required for the port are identical to Apple’s files, that would be piracy. However, if the code is re-written it is no longer copyright infringement and falls under the protection of the same ruling that makes iPhone jailbreaking legal.

          Rest-assured, if the only means of porting Siri is by way of piracy, we will not be hosting the files. But I think it’s pretty harmless to report the progress and surely you can see the difference between enabling a device specific feature on a device that is unsupported and downright stealing.

          Saying that porting Siri is piracy is like saying that CyCorder is piracy because it enables video recording on an iPhone 3G which otherwise would not have that capability. I do, however, appreciate your concern. The last thing we want to convey on this website is hypocrisy!

  • Jo

    hi.. i did a huge misstake, i installed semithetered and activated sbsettings.. so now the phone cant start, its just restarting all the time.. and I cant get it into DFU mode or reboot it tethered :S please help.. /thanks

  • Msdiesel

    Everytime I go to install SemiTether it says cannot comply (Note:the request modifications cannot be applied due to required dependencies or conflicts that cannot be automatically found or fixed)????? What do I do at this time ??