[2] Cable & Wireless plc, Hong Kong Telecom, Keppel Telecommunications, and Singapore Press Holdings all owned stake in the company at its outset.

[3] In January 1997 in the lead-up to the deregulation of the telecommunications industry in Singapore, MobileOne offered a free trial of its cellular service to build market share.

[11] MobileOne had its IPO in December 2002 and began trading on the Singapore Exchange under the stock ticker symbol, MONE.

[14] Later that year, MobileOne enlisted Taiwanese boy band, 5566, to promote the company's prepaid "M Card" in a series of ads.

[15] 2004 also saw M1 partner with Google on an image search feature[16] and begin push-to-talk trials with enterprise customers in Singapore.

[26] In 2009, M1 began offering prepaid 3G broadband service[27] and instituted a mobile handset rental program called "Take3.

[29] In September 2009, M1 acquired Singaporean internet service provider, Qala, with the goal of entering the corporate fixed broadband market.

[33] In June 2011, M1 launched the first commercial LTE service in Southeast Asia, with coverage initially centered on the financial district.

[38] In June 2015, M1 launched a cashless, mobile point of sale service in collaboration with Mastercard, CIMB, and Wirecard.

The service allows small businesses to accept credit, debit, and prepaid card payments using their smartphones or tablets.

[42] In March of that year, M1 introduced an NFC-enabled service that would allow users to pay transit fares with their smartphones.

[46] In August 2017, M1 launched Southeast Asia's first commercial nationwide narrowband Internet of Things (NB-IoT) network.

[52] In February 2019, Singapore Press Holdings (SPH) and the Keppel Corporation (through their joint venture, Connectivity Ltd) completed a buyout of Axiata's shares in M1, which totaled 28.7%.

[57] In January 2020, it was announced that M1 and fellow telecommunications company, StarHub, would submit a joint bid for one of four 5G licenses to be administered by the Infocomm Media Development Authority (IMDA).

According to the company, this technological shift was part of an effort to provide more flexibility to create new services and engage consumers.

[2] This was part of a rebrand where the company introduce a new logo, expand the functionality of its "My M1+" mobile app, and focus on becoming "Singapore's first digital network operator."