Wind Mobile wants to replace the tower to improve service, but some residents living in Rosemont and Cambrian Heights say increasing a 15 metre tower to 35 metres will be intrusive because of its size.
Cellphone providers Telus and Rogers would also have access to the tower.
Kris Olsen, president of the Rosemont Community Association, said the old tower would have to be taken out because the proposed 35-metre tower is "huge."
"For all of us who aren’t metre people, it's 120 feet, equivalent to a 10-storey building," said Olsen.
The communities say the tower could be moved closer to the nearby Confederation Park Golf Course, land owned by the city, because Calgary recently changed its policy allowing for towers on public land.
City officials are expected to decide Monday whether they will support the proposal, but the final decision belongs to Industry Canada — the federal department responsible for regulating and authorizing radiocommunication facilities.