Current 1xRTT roaming status, roaming is a general term in
wireless telecommunications that refers to the extending of
connectivity service in a location that is different from the
home location where the service was registered:
unknown(1) - roaming status is unknown.
home(2) - connectivity service in home location.
roamingWithSid(3) - roaming with SID.
roamingWithoutSid(4) - roaming without SID