Telus, Canada’s second biggest full-service telecoms operator, is considering switching from its existing nationwide CDMA-based mobile network platform to the GSM standard, to grab a bigger slice of international roaming fees from Rogers Communications, the country’s only GSM operator. The changeover idea, which could cost in the region of USD500 million, has been presented to the board, the Toronto Star said, citing an unnamed source familiar with the plan, whilst a Telus spokesman declined to comment.