There are several posts mentioned to do Wifi tethering free and no root required. 150 dollars that can be classified as fiber optic or some kind of 50MB cable speed technology. I wonder what kind of data plan you have under the contract? I don't think 4GB data plan is suffice to replace home internet for the entire month as with traffic controller I used about 100 GB+/month, and if I used my Verizon data plan and even though I have Unlimited data plan I'll be sweating. Even with WIFI, I still used 5GB of data!