[citation needed] As of fourth quarter of 2014, Singtel Mobile's 4G outdoor coverage was at 99.41%, ranked first followed by M1's 99.04%, and Starhub's 98.85%.

[47] Singtel signed a partnership with NETSTARS, (a Tokyo-based mobile payment technology company) in March 2019.

This will allow travelers to use their home mobile wallets on Singtel's VIA network to pay digitally at stores in Japan.

Its mainstay is in the mobile phone industry, where it has a total subscription base of 638 million as of 31 March 2017:[5] On 9 October 2013, a fire broke out at one of Singtel's major Internet exchanges at Bukit Panjang.

[57] After SCDF had cleared the building for access at 6pm, Singtel started repairing the damaged cable infrastructure.

[59] Business such as StarHub, M1, DBS, OpenNet and Singapore Pools saw varying levels of disruptions to their services and operations islandwide.

[61] StarHub indicated that some of the repaired OpenNet cables, which it relied on to carry its fibre internet services, were not connected properly.

[63] Both offered alternate connectivity solutions to the affected subscribers as a temporary measure while further work took place, with StarHub sending cable modems to its affected subscribers to connect to its then existing coaxial cable network (which could carry Internet services,[64] and was put to an end in June 2019[65]),[62] and Singtel sending mobile broadband dongles.

[70] Preliminary findings realised by Singtel on 6 November 2013 indicated that the fire broke out during a maintenance work at one of the lead-in pipes located in the cable chamber.

[73][74] The report covered three main areas: fire prevention in exchanges, network reliability and resiliency, as well as public relations and communications.

[77] Along with her revelation, there were many samples of Gushcloud's bloggers taking up the offer and posting complaints up on social media services.

The incident began from Singtel encountering a technical issue during its migration to a new billing system in early 2018, resulting in the personal data of 750 mobile subscribers being exposed.

In March and April 2020, Cubos sold a total of 3 iPads that belong to Singtel for at least $250 Singapore dollars and spent the money on his personal expenses.

[84] Kelvin Foo Cheek Ann was a retail consultant at the Singtel outlet in Parkway Parade.

All clients whose data sold were later received harassment calls, messages, and strangers appearing at their homes and demanding money.

On 23 January 2021, Accellion stated that a new vulnerability had emerged and patches previously applied in December 2020 are ineffective.

[87][88][89] On 10 June 2022, three employees of the affiliate marketing platform Amobee pleaded guilty in federal court to hijacking Internet Protocol (IP) addresses to send unsolicited commercial email messages, commonly known as “spam.”[90] In June 2024, Singtel was breached by China's Volt Typhoon advanced persistent threat.