Get started with the $2 Boost Prepaid Starter Pack, a simple and flexible way to join Boost Mobile. The starter SIM works with compatible devices on the full Telstra Prepaid mobile network, with access to 4G and 5G networks where available. The $2 price is for the starter SIM only. Choose your Boost Prepaid recharge separately to suit your data, calling and usage needs. You can activate the SIM with a new mobile number or bring your existing number to Boost. The SIM fits compatible devices, making it a convenient choice for phones, tablets and other supported devices. 4G/5G Ready: Access compatible 4G and 5G networks Telstra Network: Uses the full Telstra Prepaid mobile network Flexible Recharge: Choose your Boost Prepaid plan separately Keep Your Number: Bring your existing number or choose a new one