I just got new Behold II but I do not have a data plan. Initially, using WiFi, my son logged on to his Gmail account but then I cleared his login within Application settings. Now, I try to login to my Gmail account or Antroid Market but it doesn't work ...I keep getting "Cannot establish a reliable connection with server. - This could be a temporaty problem or your SIM card may not be provisioned for data service,. If it continues, call Customer care. Do I have to have data plan? If that's case, how did my son logged on to his account? Any idea?