Telecommunications company M1's 2 million mobile users will be able to make calls and send SMS and MMS messages for free every Sunday next month.
The telco is offering these free services as part of its 17th anniversary celebration.
"Sunday is the day when most of us have a bit more free time. With free calls, we hope our customers will take the opportunity to pick up their phone and share some love and laughter with those they care about most," said Mr P. Subramaniam, chief marketing officer of M1.
Singapore's third mobile operator launched its service here in April 1997. In September 2012, it was the first telco here to roll out 4G mobile services nationwide.
It plans to upgrade its 4G network by the end of this year, boosting speeds from 150Mbps now, to up to 300Mbps. Rivals SingTel and StarHub also have similar plans to boost 4G speeds to up to 300Mbps by the end of this year from their current 150Mbps and 75Mbps, respectively.
A key part of the 4G upgrade is the ability to make voice calls, expected some time this year for all three telcos. Voice calls made on 4G networks have less background noise and can be made in fewer than two seconds, compared to five to 10 seconds on 3G networks.
Making voice calls on 4G also means that when a mobile user picks up a call, his phone can continue to connect online at faster 4G speeds at the same time. Currently, when a customer surfing on 4G takes a call, he gets switched to the 3G network, and so, his phone connects online at slower 3G speeds.