Right now I'm paying $20/month for 300MB on my phone, plus $50 a month for 5GB on the MiFi, so that's less than 6Gigs for $70. For the same $70, I could send back the MiFi (just got it, it's still within the return period) and start using my Thunderbolt's mobile hotspot capability, and get 12 gigs per month. However, I talked to a Verizon agent who said the drawback would be that I couldn't make or receive phone calls while using my phone as a hotspot, plus he said the upload/download speeds could be slower than the old Mifi-to-computer connection. Does anyone have experience, opinions or advice? Thanks