According to M1, its customers on the 4G network will be able to enjoy 4G roaming services in Hong Kong with its partner, SmarTone Telecommunications Holdings Limited. More countries and operators will be added in the near future, said a company spokesperson.

Along with the launch of this 4G service, M1 also announced that it will introduce new smartphone and mobile broadband service plans.

"With the new data bundles starting from 2GB per month, the majority of customers will not incur higher charges," the telco said in its statement. "78 percent of smartphone users consume less than 2GB of mobile data per month and 93 percent less than 5GB of mobile data per month. For customers who use beyond bundled allowances, excess data will be priced at an affordable S$5.35 per GB."

Furthermore, re-contracting M1 customers will be given an additional 1GB of complimentary data bundle on the new smartphone and mobile broadband plans, said the telco.