Horsham and Riverside residents are now more likely than not to have access to 5G-level mobile network coverage.
Telstra has announced more than 50 per cent of these two suburbs have 5G coverage.
Regional General Manager Steve Tinker said more regional suburbs would be switched on over the coming months.
5G stands for fifth generation. Telstra says people that access the network will notice improved download speeds, better streaming and real-time gaming, among other benefits.
Residents need a 5G device and a 5G-ready mobile or data plan to connect.
A spokesman said Telstra plans to expand its 5G network to cover 75% of the Australian population, up from a third where it is currently, by the end of June next year.
He did not have a concrete timeline for its rollout to the rest of the Wimmera.
He said since the COVID-19 pandemic had begun in Australia, daytime peak traffic on Telstra's fixed network had increased by 111 per cent and evening traffic 27 per cent.
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"Gaming has been one of the largest contributors to individual daytime traffic growth on our fixed network, especially when new releases or game updates are pushed out," he said.
"On the mobile network, daytime peak traffic in Victoria has increased by about six per cent but still isn't as busy as typical evening peak periods so the network can easily handle it."
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