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Optus is closing part of its 3G network – how will this affect you

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Optus will next month be closing part of its 3G network and repurposing it for its 4G and 5G networks – but how will this affect you?

The Optus 3G network operates on two spectrum bands – 2100Mhz and 900Mhz.

But from May the 2100Mhz band will be redirected to the Optus 4G network to improve speed and reliability and help with the expansion of the company’s 5G network.

Telstra and Vodafone closed their 2100Mhz 3G bands in 2019.

Naturally, 3G devices running on 2100Mhz will no longer function on the Optus network. And it’s not just smartphones that will be affected but also medical devices as well.

Optus is telling its customers if they have a personal medical device that operates on 3G 2100Mhz they need to check with the manufacturer and upgrade their device as soon as possible.

If you are currently relying on a connected medical device and are an Optus customer, you need to check whether it needs upgrading.

A 3G device that’s compatible with the 900Mhz band will be unaffected.

Customers affected by this change will need to upgrade to a 4G or 5G device and will need a new SIM card.

But they will still be able to keep their current number.

Some of the more popular smartphones that will be affected will be the iPhone 3GS, ZTE Tough 3, Samsung Galaxy S2 and the Samsung J750.

Optus is urging its customers who are unsure about the 3G compatibility of their devices to call the manufacturers or check their website before the start of May 2022.