phones in Fourze

here is some interesting that i notice in Kamen Rider Fourze is that the characters have cell phones which i'm surprise that they use them so what model do they use?

JK use a Softbank flip phone don't know what model it is though his is decorated with JK the Informer

Gentaro use Lumix Phone 001P & damn its expensive & is he using Twitter?!

Kengo uses an iPhone 4s while Yuuki & Ryuusei uses an Android smartphone Ryuusei's model is look like an Aquos model

they have really cool & expensive phones why can't the US have those awesome phones that Gentaro,Ryuusei & Yuuki have