The Blackberry Storm says it supports 3G but I'm not sure if it will correctly work on Japan's native cell phone network.
Cell Phones & Plans - 3 Answers
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1 :
Yo try it in that network & check whether it is unlocked or not if it work and active it supporting otherwise you want to contact the Service provider or the Mobile service Center I followed clearly the unlocking instructions got from the site http://www.mobileunlockguide.com/ and then i unlocked MY Blackberry from the T-Mobile US nEtwork it now working on the Vodafone Australia.
2 :
You can chk with service center. Or you can get it online from http://www.mobileunlocksolutions.com/ @ cheaper rate
3 :
You get the unlocking code from http://www.unlocking4u.com/ .After you can use the any network in your mobile....It's useful for you.