[1] Optus claims it is the first to offer Wi-fi service via an app, WiFi Talk, which allows customers to be able to make calls and send text messages over Wi-Fi.
[2] Its customers are able to text or call any mobile or landline in Australia or overseas where they are charged through the mobile bill or deductions made from their prepaid balance.
[3] The WiFi Talk is a solution to help customers stay connected whether at home, in the office, or indoors with limited coverage.
[Source] Australian Information Technology News – Optus launches WiFi Talk app
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