AT&T today tweaked its Mobile Share Value plans and added data to two of the options. Specifically, the $40 plan improves the data allowance from 2GB to 3GB, and the $70 plan improves the data allowance from 4GB to 6GB. All other plans/costs remain unchanged. The Mobile Share Value plans have a per-line access charge of $25 per month for AT&T Next subscribers or $40 per month for contract customers. The data packages are in addition to the per-line fees. AT&T also offers 300MB for $20 and 1GB for $25. All the plans include unlimited talk and text. Tablets still carry a $10 monthly access charge. The new plans will be available to new and existing customers from November 2 through November 15. Customers who need more data to share can take advantage of AT&T's Double the Data offer on its Mobile Share Value plans (15GB to 50GB), which now runs to November 15.