xperia 1 iv no sim service Australia

[exsanguinator]

since November 2014 my as new xperia I iv has been disconnected on boost Australia service. 

Telstra say phone is not compatible as it doesn't have 4g VoLTE.

but I remember I had full 5g before it went off. 

so I can't understand their reasoning. 

anyone else have the same problem?

[TheRealOG]

@exsanguinator based on the specs of your phone it does support the 5G band: https://www.sony.co.uk/electronics/support/mobile-phones-tablets-mobile-phones/xperia-1-iv-256gb/spe...