no. they're using CDMA 1xEV-DO. sprint in us and ntt docomo in
japan uses that too. korea also uses PCS 1900Mhz.
if u could recall, m1 was the only provider to launch a cdma
service in the 1990s.
but if u go to japan/korea/u.s., u can use their network as long as
u have a phone that supports the 1900 mhz frequency.
