With the onslaught of low-cost carriers having escalated the mobile wars in the US, bigwig carrier AT&T has recently announced new promotional Mobile Share Value plans, under which the company is offering double the amount of data on its existing 15GB to 50GB plans.

The new promotion announced by AT&T works in such a way that the new as well as existing customers will get 30GB of data for the price of 15GB; with the top-tier plan offering 100GB of data for the cost of 50GB.

The promotional Mobile Share Value plans also allow subscribers to share data on up to 10 lines; with business customers allowed to share 60GB to 100GB data on up to 25 lines.

The new offer announced by AT&T implies that customers will have to pay $130 a month for 30GB of data, plus $15 per line with an AT&T Next or no-term contract, or $40 a month with a two-year contract. Subscribers who want 40GB data under those terms will have to pay $150 a month. For 60GB data, the monthly payment will be $225; while for 80GB and 100GB data, the monthly cost will be $300 and $375 respectively.

To avail the promotional Mobile Share Value plans with double data, customers have to sign up by October 31. AT&T has asserted that the promotional rates can be kept by the customers for as not as they want, as there will be no expiration.