T-Mobile added HD video streaming and 10GB of LTE hotspot tethering to its unlimited One plan earlier this month, possibly as a response to Verizons new unlimited data plan. Yes, the mobile carrier wars have been intense lately, and theyre getting even hotter. Just hours after AT&T announced it was also adding 10GB of tethering data to its unlimited plan, T-Mobile fired back with another tweak to its One plan. Now, new and existing customers with two lines can get a third for fr…Read more