Huh, interesting! Back when I was looking into this stuff, au/KDDI was on a completely incompatible band (900? 700?), hence my surprise when I got roaming in Sendai but not Tokyo. Fast forward to now, and it looks like they're about to finish a migration to the 800 band (like verizon) this July.
From what this guy says, it sounds like it's probably MEID:
http://softbanksucks.blogspot.com/2011/10/au-iphone-will-not-work-with-other-cdma.html
Wow thanks for that link. One, I never knew they used a different band as I only learned they were the same when the iPhone 4S came out
🙂
As for that - it's weird. RUIM and CSIM are the same thing, just to clarify. Why would moving RUIM not allow you to swap handsets. Is au somehow BOTH using RUIM/CSIM and authenticating the MEID? It'd make sense. Japan's mobile phone market is that screwed up.
There isn't a civilized country in the world with a mobile phone situation as bad as Japan. We think it's bad in the US, but Japan's just awful.
Most places in Europe, 10 euro or so will get you data for a short trip. Germany's more like America but still not as bad as japan - 25 euro or so there. Also, Germany, Italy, and some other places require registration and stuff. The difference is, as long as you're in a city, they know how to lie to get tourists their SIM cards (passport number plus address of hostel/hotel/even the phone shop, plus generated tax ID in italy). Japan's much stricter.
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Huh, interesting! Back when I was looking into this stuff, au/KDDI was on a completely incompatible band (900? 700?), hence my surprise when I got roaming in Sendai but not Tokyo. Fast forward to now, and it looks like they're about to finish a migration to the 800 band (like verizon) this July.
From what this guy says, it sounds like it's probably MEID:
http://softbanksucks.blogspot.com/2011/10/au-iphone-will-not-work-with-other-cdma.html
Wow thanks for that link. One, I never knew they used a different band as I only learned they were the same when the iPhone 4S came out
🙂 I now from that see only the cellular band is the same. CDMA at 2100? What the heck? Wow...
As for the MEID thing - it's weird. RUIM and CSIM are the same thing, just to clarify. Why would moving RUIM not allow you to swap handsets. Is au somehow BOTH using RUIM/CSIM and authenticating the MEID? It'd make sense - Japan's mobile phone market is that screwed up.
There isn't a civilized country in the world with a mobile phone situation as bad as Japan. We think it's bad in the US, but Japan's just awful.
Most places in Europe, 10 euro or so will get you data for a short trip. Germany's more like America but still not as bad as japan - 25 euro or so there. Also, Germany, Italy, and some other places require registration and stuff. The difference is, as long as you're in a city, they know how to lie to get tourists their SIM cards (passport number plus address of hostel/hotel/even the phone shop, plus generated tax ID in italy). Japan's much stricter.