I use the 300 minute prepaid plan and love the fast speed. Best thing about the T-Mobile service is the access at Starbucks -- for downloading a big powerpoint file it can't be beat. The 300 minute prepaid units are good for 120 days after activation (and everytime you buy new minutes, your balance of old minutes takes on the new expiration date). BTW, the connection is strong and fast at the SNA Admirals Club based on my experience a couple of days ago.