singtel iphone x pre-registration
A Singtel logo is pictured at their head office in Singapore 11 February 2016 (Edgar Su/File Photo/Reuters)

Singtel on Friday said it launched Singapore's first mobile plans with unlimited local data, talktime and messaging services.

Starting September 15, Singtel Combo 3, 6 and 12 mobile plans will be upgraded with unlimited talk time and SMS, the company said in a statement.

Customers who sign up for these plans can enjoy unlimited local data with DATA X INFINITY, an add-on available at just S$39.90/month, it said.

"We recognise that our customers want flexibility and control over their mobile plans. That's why our DATA X 2 and DATA X 3 add-ons have been so well-received. And now with DATA X INFINITY as a further option, our customers can enjoy infinite possibilities for how they live, work and play," said Yuen Kuan Moon, Chief Executive Officer, Consumer Singapore at Singtel.

On the occasion of launch, customers who subscribe to Combo 6 and 12 plans can enjoy a free data roaming plan each month. Customers can choose from any of Singtel's extensive range of data roaming options of up to S$35 to stay connected while overseas.

Customers who subscribe to DATA X INFINITY will also have the option to share their data with up to three family members with a MobileShare supplementary plan, which is available at S$10.70/month per line, the company said.

Shares in Singtel were down 0.3 percent at S$3.66 on the Singapore Exchange.