AT&T to raise data rates with share option NEW YORK (Reuters) - AT&T Inc (T.N) is following bigger rival Verizon Wireless with a new type of family plan that comes with a sharp increase in its fees for data services such mobile Internet. But unlike its rival, AT&T says the plan will be an option rather than a requirement for new customers and subscribers upgrading to a new phone. Late next month AT&T, the No. 2 U.S. mobile provider, will launch the new offering, which allows its customers to buy a single data plan for up to 10 devices and includes unlimited phone calls and text messages for these customers. The hope is that the new plan, similar to one kicked off by Verizon Wireless in June, will entice individuals and families to connect more devices such as tablet computers to the AT&T network because they will no longer have to buy a separate monthly data allowance for each mobile device. Since young consumers are making fewer phone calls in favor of communicating via data services, AT&T, like Verizon Wireless, is overhauling its pricing in a bid to boost revenue from data services and to avoid a future decline in voice revenue. Under the new plan, which will be launched in late August, AT&T's data price will be as much as four times higher than its current fee. For example it will charge $40 for 1 gigabyte of data per month, compared with its current rate of $30 for 3 gigabytes. AT&T hopes the plan leads people to buy data in bulk because the bigger the data plan, the cheaper the per gigabyte rate. A customer who wants 20 gigabytes of data, would pay $200 every month, or $10 per gigabyte - level with its current $30 plan. "We think there's really great flexibility for these plans," David Christopher, AT&T's chief marketing officer for mobile told Reuters. For example, he said a customer could use more data on their tablet one month and switch their heaviest usage to their smartphone the next month without adjusting their plan. Or if some family members tend to use less data than others, the heavier users would be less likely to go over their limit and incur hefty overage fees under the new plan. But if the higher price for each gigabyte of data is off-putting for some consumers, there is one key difference between AT&T and Verizon Wireless. AT&T will keep offering its existing plans whereas Verizon Wireless offers no choice to new customers and customers upgrading to a subsidized phone. If shared data is not for you then we'd love for you to stay on our existing plans. We know the existing plans make sense for lots of situations," Christopher told Reuters in what appeared to be a veiled dig at Verizon Wireless. The executive declined to disclose the company's expectations for the impact on revenue and customer growth. When Verizon Wireless announced its data share plan on June 12 some customers complained loudly that they did not want unlimited phone calls or higher data fees. Under the new plan an AT&T customer with one smartphone would pay a $45 monthly fee for unlimited calling and texting and a $40 fee for one gigabyte of data. The voice and texting fee per smartphone drops to $40 for customers who pay $70 a month for 4 gigabytes of data. An AT&T customer buying 20 gigabytes for $200 a month would pay $30 for voice and texting for each smartphone, leading to a total bill of $350 for a family of 5 people. In comparison, a Verizon Wireless customer would pay $150 for 20 gigabytes of data and $40 per smartphone, also leading to a total bill of $350 for a family of 5. Their next biggest rival, Sprint Nextel Corp (S.N), does not offer family plans for data, but instead offers unlimited data usage for a flat monthly fee. Verizon Wireless is a venture of Verizon Communications Inc (VZ.N) and Vodafone Group Plc (VOD.L). Reporting By Sinead Carew; editing by Andre Grenon