3 Min Read (Reuters) - Australian telecom firm Telstra Corp said it will sell a 49% stake in its mobile tower business for A$2.8 billion ($2.1 billion) and return half the sale proceeds to investors, sending its shares to their highest level in over a year. FILE PHOTO: A man and power lines are reflected in a Telstra poster adorning a public telephone in Sydney, Australia, August 13, 2015. REUTERS/David Gray/File Photo A consortium of Australia’s sovereign wealth Future Fund and pension funds Commonwealth Superannuation Corp and Sunsuper would buy the stake in InfraCo Towers, Telstra said, in a deal valuing the entire business at A$5.9 billion.