Just tried it... have the phone setup as WIFI tethering. Then have a computer connected to it. Then the browser shows a Tmobile page saying "Your current data plan does not support tethering your phone to another device for Internet access. Please have your primary account holder call Customer Care, 1-800-937-8997" Then on the right side, it shows "Phone Tethering & WIFI Sharing" for $14.99 per month! OH NO!!!