Mobile PHOTO: M1 Handout M1 has unveiled a series of mobile plans that let Singapore users customise how much to pay for a phone upfront and then load the balance onto their monthly phone bill. The offerings, out today, also enable users to flexibly choose the amount of data and call minutes they would like to have each month, as well as the contractual lock-in period. Part of a revamp that the telecom operator revealed today, the new plans are a result of its digital back-end servers that are now flexible enough to deliver more options to users. It also comes two years after the company was delisted from the Singapore Exchange amid an ownership change and much uncertainty over its future in a highly competitive market.