I have been with Virgin for many years but they are closing down. I am now moving to Telstra. My Virgin supports the 4g network. My new sim only plan is 3g. Is sim only limited to 3g and and is a more expensive plan with a mobile support 4g. Please advise.
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What make and model phone do you have? The phone might not support the frequencies Telstra uses for 4G. All Telstra SIMs should support both 3G and 4G.