Mobile service provider AT&T announced Saturday that it would double the amount of data on the company's shared data plans, starting at the 15-gigabyte tier.

To avail of the added data, subscribers must first bring their own phone or sign up for Next, AT&T's monthly installment plan. The promotion starts on Sunday and would end on Oct. 31.

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The offer is the most recent promotion from a telecommunications company aiming to keep its loyal customers and woo new ones from its competition. It comes at a time when the third top carrier by number of subscribers Sprint has shown that it's not done yet in the industry, with a number of new plans and a new chief executive officer, and T-Mobile leading the race on subscriber growth.

The top firm, Verizon Wireless, is also attempting to join the fray by offering to boost a user's data temporarily.

The difference between the number one player's promotion and AT&T's is that the latter's doubled mobile data doesn't disappear after a set amount of time. Consumers who sign up would keep the doubled data as long as they stay on the specific plan.

The offer comes in the wake of chief AT&T's chief executive officer for mobility and enterprise business Ralph de la Vega's slamming of "exploding plans," where the promotions expire, leaving consumers to receive a lesser plan.

"Those exploding offers -- customers hate those offers," de la Vega said earlier this month at an investor conference. "Unless they change their mind, we won't offer those kinds of promotions."

The data plans range between 15 gigabytes and 50GB, which equates to a new range of 30GB to a hundred gigabytes.

Subscribers would pay a set price for text messaging, calls and data under the company's mobile share plan, with the cheapest tier at $130 and the highest is $365. Adding smartphones on the plan would have an additional charge of $15 per handset.

TagsAT&T, T-Mobile, Sprint, telecommunications, Mobile data, AT&T offer, Doubled mobile data