1. Do I need to get the 30$ hotspot if I tethering with USB and/or Bluetooth? 2. If I am tethering to get internet connection for my Desktop PC, can I still receive/send calls? 3. Is there a data limit depending on 3G/4G reception? Meaning, if Im not getting 4G in my area, am I limited to 5GB w/ 3g if I want to tether & use phones internet? 4. Do i need to root the EVO so i dont have to pay the 30$ hotspot to tether?