You can download Tether to your new BlackBerry by going to the following link on the BlackBerry Browser:
Launch Tether on your BlackBerry by highlighting the blue 't' Tether icon and clicking the trackball or by pressing the Enter key on the keypad. With Tether running and visible on your BlackBerry, select USB or Bluetooth then click on the BlackBerry button to open the menu and select 'Register'. Enter the Tether registration code you were email after your original purchase of Tether including the dashes, this will update our site to reflect your new/different BlackBerry Pin.
If you don't know your Tether registration code please visit the following link and select the option "I forgot, lost, or need my Registration Code" and enter the email address you used during your original Tether purchase. You will be emailed your Tether registration code.
If you have any problems email our support team please.