AT&T's Mobile Share plans have sometimes been too expensive for customers who only need a little data. The carrier will soon be more accommodating, however: it's adding both 300MB and 2GB tiers on July 26th. The $20, 300MB pack costs half as much as the 1GB plan, and is intended mostly for basic phone users. We've reached out for more details on 2GB pricing, but it's not hard to see this new tier slotting neatly between the 1GB and 4GB offerings. Both new plans should
