We can't vouch with any certainty that individual subscribers have embraced AT&T's Mobile Share plans with open arms. Corporate customers (and simply the very well-heeled) are another matter: they could use big buckets of data to get their many devices online, which is why AT&T is adding considerably more headroom today. It's launching new 30GB, 40GB and 50GB Mobile Share plans that respectively cost $300, $400 and $500 per month when there's unlimited voice and messaging attached. While those rates will be ey
