Tether for BlackBerry is a extremely useful app! It allows you to use your current BlackBerry data package as a wireless modem on-the-go, with no additional tethering charges. Tether for BlackBerry normally costs $49.95, however for today (Friday) only you can get Tether at 50% off! This means you can grab a copy for only $24.97. All you have to do is follow the link below and grab it from the BBSync Store.