How to check T-Mobile voicemail on Windows 11 but I am not a T-Mobile customer?

I am a customer with Liberty Wireless who rent T-Mobile network and use T-Mobile voicemail system so that my voicemail is T-Mobile voicemail. Since I am not a customer for T-Mobile, I do not have a sign in T-Mobile account to check voicemail there. How I can check my T-Mobile voicemail on my Windows 11?