I have an At&t USB aircard that I use on my MacBook when I'm not within wifi range. Ipad with cell connectivity is several weeks out. Bought a Cradlepoint 3G Mobile Broadband Travel Router at BestBuy for $70. Aircard plugs into this device, which then creates a wifi network that uses the aircard's signal. Met effect: one aircard bill vs 2, ipad works everywhere now. Special deal: if you register the device with mfr, they'll send free auto adapter. Installation of device? No software--just plug in device & aircard and it works. Check website for compatibility before you purchase: cradlepoint.com. I bought CTR350.