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Thread: Are providers aware of Tethering on iPhone?

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Hi there. I own an iPhone 4 and an iPad 2 (WiFi) Model. I am planning to use MyWi to tether my iPhone4's 3G internet to use on iPad. i
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  1. #1
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    Default Are providers aware of Tethering on iPhone?
    Hi there.

    I own an iPhone 4 and an iPad 2 (WiFi) Model. I am planning to use MyWi to tether my iPhone4's 3G internet to use on iPad. i live in japan and my carrier is Softbank and they told me that they dont allow tethering, i was wondering how they get to know that i am tethering??
    iPhone 4
    Firmware : iOS4
    Carrier : Softbank (Japan)
    Jailbroken using Jailbreakme

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    I hear PDA net is able to hide your tethering activity from your carrier.


    Sent from my iPhone using ModMyi

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    They look at the MAC address.

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    How about MyWi?
    iPhone 4
    Firmware : iOS4
    Carrier : Softbank (Japan)
    Jailbroken using Jailbreakme

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    It's not the mac address that they look at. I saw an article not too long ago on this and explained how carriers like AT&T were able to detect it.

    Snippet from the article:
    Jailbroken iPhones typically use the same tethering technique as a standard iPhone, the one thatís already present in iOS. This method exposes tethering activity quite readily, because the iPhone, when in tethering mode, sends traffic through an alternate APN (AT&T access point/router) for the express purpose of identifying the traffic as tethered data. This makes it extremely easy for AT&T to identify whether or not an iOS device is utilizing tethering, and just how much of their data is consumed via tethering.

    From what I read, PDANet and one or two other tethering apps avoid this. Last I heard, MyWi doesn't.

    Link to original article here

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    AT&T carrier.plist is built in order to charge tethering traffic at a particular tariff. Some people are aware of that and change type-mask in carrier.plist to route tethering traffic through a low cost APN where comes the question how AT&T detect and send warning message.

    In the case of Softbank, the only type-mask used in carrier.plist is 7 for MMS/VVM/Data, no APN for tethering, all traffic will be through the same APN and the question is how can they detect if tethering is used.
    Last edited by aneagle; 05-16-2011 at 10:35 AM.

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    So the question stands, how Softbank is gonna know someone is tethering?
    iPhone 4
    Firmware : iOS4
    Carrier : Softbank (Japan)
    Jailbroken using Jailbreakme

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    Quote Originally Posted by raziiq View Post
    So the question stands, how Softbank is gonna know someone is tethering?
    Packet inspection will reveal more than one MAC address, the iPhone's and the non-iPhone's.
    Last edited by aneagle; 05-16-2011 at 09:21 PM.

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    Quote Originally Posted by cornbrown View Post
    I hear PDA net is able to hide your tethering activity from your carrier.


    Sent from my iPhone using ModMyi
    Have you used it? I heard people saying Pdanet is quite buggy
    iPhone 4
    Firmware : iOS4
    Carrier : Softbank (Japan)
    Jailbroken using Jailbreakme

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