To all whom it may concern. I called Google costumer service to ask what would happen if I tried to enable wifi tether from the android menu. The representative said that it would only redirect me to a page to contact T-Mobile so that I can buy a tethering plan. I gave FoxFi from the Play Store a try and it worked perfectly to tether my tablet to my stock 4.0.4 ICS Google Nexus. Just decided to jot this down if anyone was wondering about this, I know I was.