The company said in a statement the new towers would provide the two areas with dedicated 4G coverage and were part of its $3.4-million investment in its network for the remainder of 2020.
Optus' Territory general manager for Tasmania, Peter West, said Optus had continued to invest across Tasmania to improve connectivity and offer Tasmanians competition and choice for mobile services.
"Investment for Tasmanians is a priority for Optus, with $2.55 million being invested into improving our network across the state in the last 12 months, building four new sites," he said.
"In these times of uncertainty, we are committed to doing our part by continuing to focus efforts on maintaining our strong network.
"The new site in East Devonport provides dedicated mobile coverage for those located East of the city and enhances coverage along parts of Bass Highway, ensuring travellers can stay connected with their family and friends through reliable voice and data access.
"As a result of the new site in Acacia Hills, residents have received expanded coverage and capacity along Melrose and Sheffield Roads, contributing to our improving mobile network in the area.
"We see and hear the demand for improved mobile coverage in regional and rural Australia, so we are thrilled to be delivering this for residents, businesses and visitors to the north-west coast of Tasmania.
"This also complements our existing relationship with the Federal Government, as part of the Mobile Blackspot Program, and the Tasmanian Government on the Great eastern Drive project.
"To add to the great news for customers, we also look forward to opening our first ever retail presence in the North West, located in the Rooke Street Mall."