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Discuss Japanese iPhone work abroad? at the General - Hackint0sh.org; Will a Japanese iPhone that is unlocked work in other countries with a GSM SIM? ...
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    Default Japanese iPhone work abroad?

    Will a Japanese iPhone that is unlocked work in other countries with a GSM SIM? Also will a factory unlocked Hong Kong iPhone work in Japan with a Japanese prepaid SIM? I remember that I had to rent a phone when visiting Japan several years back and I was told that Japan has their own proprietary 3G network, but I'm not sure if that still applies today.

    Thanks,
    HL



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    Quote Originally Posted by hanguolaohu View Post
    Will a Japanese iPhone that is unlocked work in other countries with a GSM SIM? Also will a factory unlocked Hong Kong iPhone work in Japan with a Japanese prepaid SIM? I remember that I had to rent a phone when visiting Japan several years back and I was told that Japan has their own proprietary 3G network, but I'm not sure if that still applies today.
    Mostly Japan does have their own network and standards. However there has been a slow alignment as 3G has progressed to a more common group of standards. The Japanese carrier Softbank has a 3G network that is compatible with most quadband 3G phones worldwide.

    I also believe NTT DoCoMo has a network that might be compatible - they were the first in the world to adopt W-CDMA which is what most people refer to as 3G.

    A 3G, 3GS or iPhone 4 from Japan is typically carrier locked - so it would need to be unlocked to work in other countries.

    Factory unlocked 3G, 3GS or iPhone 4 (from any carrier) will work in Japan on softbank and maybe with NTT DoCoMo.

    The original iPhone probably will not work - it does not support the right air interface - even if it operates on the correct frequencies.
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    Olethros, that was an amazingly informative post, thank you!

    Some quick questions:

    1. Is Japanese iPhone 3GS unlockable with Pwnage and ultrasn0w just like USA iPhones? I read that Softbank puts a special software that differentiates Japanese iPhones

    2. I read that Japanese iPhone's don't have a SIM but operate on the network. Does this create a problem because of the hardware difference?

    3. How about Korean iPhones
    or other country's iPhone use in Korea?

    Thanks again!

    2

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    Quote Originally Posted by hanguolaohu View Post
    Olethros, that was an amazingly informative post, thank you!

    Some quick questions:

    1. Is Japanese iPhone 3GS unlockable with Pwnage and ultrasn0w just like USA iPhones? I read that Softbank puts a special software that differentiates Japanese iPhones

    2. I read that Japanese iPhone's don't have a SIM but operate on the network. Does this create a problem because of the hardware difference?

    3. How about Korean iPhones
    or other country's iPhone use in Korea?

    Thanks again!

    2
    The only thing I know about Japanese iPhones is that you can't disable the camera shutter sound - even when the iPhone is in silent mode. This is to stop people taking candid snaps. This is done via software - likely the software is the same worldwide - but if it detects it is running on a phone with a Japanese model number then it activates the anti-pervert camera sound on always feature.

    The only iPhone model that has a hardware difference is the current Chinese model which lacks wifi.

    I don't live in Japan - but I know that there is no real difference hardware wise with any of the iPhones except the Chinese one. With all other iPhones, the only difference is the model number and carrier lock - these are set at manufacture time and attempts to modify them later usually leave the iPhone in a non working state.

    You should be able to jailbreak and unlock on the Japanese iPhone just like an iPhone from any other country. Just remember with the 3GS, that you need a <3.1.3 SHSH or to have never upgraded past 3.1.2 to pwn the iPhone.

    3.1.3 - can use Spirit to jailbreak - if you can get past the "slide for emergency" screen (ie activate legitimately)

    Ultrasn0w unlock works with all 3.x and 4.0 iOS versions - but you need to be jailbroken first.

    Most Korean mobile carriers (and I think some Japanese carriers) use networks that derived from CDMA - these don't use SIM cards and the networks/phones made for these networks are not compatible with 3G phones like the iPhone. This is similar to the problem in the US where carriers like Verizon have a CDMA derived network and as a result iPhones will not work on their network.

    There are no iPhones (outside of some which might exist in a prototype lab at Apple) that work with CDMA standard. Don't be confused if you see things like the iPhone supports WCDMA - this is not the same as CDMA.
    Last edited by Olethros; 07-14-2010 at 03:49 PM.
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    Incredibly informative, thank you!


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    Hi to all. I lived in Japan for a few years and bought an iPhone 3GS. Left the country recently and when stopped the contract, Softbank kept the sim card. I'm in Spain now and want to make a new contract with Movistar (Telefonica) using my Japanese iPhone. While I was in Japan I jailbroke my phone without a problem. I just tried to unlocked it using both ultrasn0w and blackra1n through Cydia and I'm not entirely sure if the procedure worked because I can still see "Softbank mobile 5.0" as my carrier under the phone's settings. Is this normal? Will it change once I install Movistar's sim card? Is there any way to tell if the unlocked worked without an activated sim card?

    I've tried to find answers but can't find any information to unlock Japanese iPhones properly. I believe Olethros is right when saying all the iPhones other than the Chinese are exactly the same at a hardware level. But I think Softbank is doing something to their phones and the unlocking might be a little bit trickier than normal... I could only find one site claiming to have unlocked a Japanese iPhone successfully by using a method that needs Softbank's sim card. That option for me is not possible right now.

    My iPhone 3GS has a 3.1.2 (7D11) firmware, 5.11.07 baseband, is an MC model and was jailbroke with blackra1n. If any of you need more details, let me know. I would really appreciate any help, specially if you unlocked a Japanese iPhone successfully. Thanks in advance!
    Last edited by Totororoto; 09-27-2010 at 04:15 PM.

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    Quote Originally Posted by Totororoto View Post
    I to all. I lived in Japan for a few years and bought an iPhone 3GS. Left the country recently and when stopped the contract, Softbank kept the sim card. I'm in Spain now and want to make a new contract with Movistar (Telefonica) using my Japanese iPhone. While I was in Japan I jailbroke my phone without a problem. I just tried to unlocked it using both ultrasn0w and blackra1n through Cydia and I'm not entirely sure if the procedure worked because I can still see "Softbank mobile 5.0" as my carrier under the phone's settings. Is this normal? Will it change once I install Movistar's sim card? Is there any way to tell if the unlocked worked without an activated sim card?

    I've tried to find answers but can't find any information to unlock Japanese iPhones properly. I believe Olethros is right when saying all the iPhones other than the Chinese are exactly the same at a hardware level. But I think Softbank is doing something to their phones and the unlocking might be a little bit trickier than normal... I could only find one site claiming to have unlocked a Japanese iPhone successfully by using a method that needs Softbank's sim card. That option for me is not possible right now.

    My iPhone 3GS has a 3.1.2 (7D11) firmware, 5.11.07 baseband, is an MC model and was jailbroke with blackra1n. If any of you need more details, let me know. I would really appreciate any help, specially if you unlocked a Japanese iPhone successfully. Thanks in advance!
    It's a pity that they kept your SIM card, it would have been useful for legitimate activation.

    Please don't try or use blacksn0w - only use ultrasn0w.

    I'm not too keen on blackra1n's hacktivation (has some problems) but your scenario should work. Just insert the other SIM card and it should be fine.
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    iPhone 4 32GB (4.2.1, Redsn0w JB-monte) oldest SHSH 4.1
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    Thanks Olethros. I'll keep your advice in mind if I try to unlock the phone again. As I explained on my previous post, I already used ultrasn0w though but the carrier information under the settings was still Softbank... is that normal? Shouldn't that disappear? I don't want to get a contract without knowing if my iPhone is unlocked.

    I would really appreciate if someone knows for sure that a Japanese Iphone can be unlocked without a sim card.

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    Quote Originally Posted by Totororoto View Post
    Thanks Olethros. I'll keep your advice in mind if I try to unlock the phone again. As I explained on my previous post, I already used ultrasn0w though but the carrier information under the settings was still Softbank... is that normal? Shouldn't that disappear? I don't want to get a contract without knowing if my iPhone is unlocked.

    I would really appreciate if someone knows for sure that a Japanese Iphone can be unlocked without a sim card.
    I think you might be confusing activation/hacktivation with unlock.

    The ultrasn0w unlock only kicks in when there is a SIM card inserted.

    Activation is required to get past the "slide for emergency" screen that comes up after you have restored the iPhone, or if you have swapped SIMs and this has invalidated your existing activation.

    Blackra1n should have installed a hacktivation dylib that ensures you can swap sims and not get thrown back to the "slide for emergency" screen.

    You can check this by using examining the file /System/Library/LaunchDaemons/com.apple.mobile.lockdown.plist and looking for a section called DYLD_INSERT_LIBRARIES - it should be present and mention a blackra1n hacktivation dylib.
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    iPhone 4 32GB (4.2.1, Redsn0w JB-monte) oldest SHSH 4.1
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    Yes, I was confusing both Sorry for my little knowledge on the matter. What should I do now? I already used both ultrasn0w and blackra1n. Will that cause any problems?

    I'm at work now and don't have the cable to connect my iPhone and check for the dylib file you comment unless there's another way to navigate through iPhone's files without a computer.

    So, do you recommend to buy the sim card and keep testing? Will the Softbank info change (from within the carrier settings info) once I insert Movistar's sim?


 

 
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