Apparently JB Hi-Fi Mobile uses the full Telstra network, like Boost.
JB Hi-Fi $39 SIM Kit BETTER THAN 1/2 PRICE
Includes 50GB on activation
*50GB for $39 on first 2 recharges 30GB for $39 from 3rd recharge onwards
*Offer valid for SIMs activated by 5 August 2024. Second recharge must occur by 7 October 2024. 30GB for $39 from the third recharge onwards. For new customers only. 30 day renewal. For data rollover, recharge before 30 days or unused data will expire.