AU kDDI user?

[genki]

Hi,
is there any of u AU KDDI user?
I've already post in gadget forum but not much reply, i hope a lot more people here reply me

how long u using their phone? what phone thpe u have? have u upgrade your keitai?
maybe someone have upgrade i interested buying your second hand keitai since my bro still in japan, and i want keitai but must contract so, anybody can help? please answer my question too

thanks

genki