US iPhone use in Japan

projkt13

New Member
Oct 22, 2007
25
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0
Oceanside, CA
#1
So heres the deal. I just moved here to Japan from Cali and I want to use my iPhone instead of buying a phone here. It is unlocked already but I went into the cell provider store and they told me that I couldnt use the Japanese sim card in my iPhone for some reason.

Is this true? Did I just waste time and money on an iPhone that I cant use in another country? Please educate me :)
 

sdge

New Member
Bronze
Jul 8, 2007
244
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0
#2
I'm curious about this too. I'm going to study abroad in Korea for 4 months and they are about to get iPhone there (I think they just got it this month) and I'm hoping I can just get a sim card and slap it into my phone.

I'm really thinking you can put the japanese sim card in, because I don't think any international version of iPhone is any different.

I've been wrong before.
 

krypto

New Member
Bronze
Feb 18, 2008
120
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0
Honolulu, Hawaii
#3
So heres the deal. I just moved here to Japan from Cali and I want to use my iPhone instead of buying a phone here. It is unlocked already but I went into the cell provider store and they told me that I couldnt use the Japanese sim card in my iPhone for some reason.

Is this true? Did I just waste time and money on an iPhone that I cant use in another country? Please educate me :)
As far as I know, Japan uses CDMA based cellular networks mostly. GSM is not deployed at all in Japan. iPhone uses GSM tech.
 

Marianne

Zealot
Moderator
Jul 16, 2007
2,326
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Massachusetts
marianneschultz.com
#4
As far as I know, Japan uses CDMA based cellular networks mostly. GSM is not deployed at all in Japan. iPhone uses GSM tech.
I think this is partially correct. I have co-workers who travel to Japan frequently who are able to use their 3G phones there (iPhone 3G and a Blackberry Bold). The only GSM networks in Japan are 3G networks, so you would not be able to use a first-generation iPhone there since it won't connect to a 3G network. The store employees were telling the truth.
 

bobhizen

New Member
Jul 21, 2009
1
0
0
#6
Simcards

The way I see it, sim cards are regional pieces of hardware. They are made to function for a given country. This is true for sim cards sold by the providers. If however, there are "jail broken" versions of a sim card - maybe that would alleviate your predicament...

SLAMattina
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