How Do You Hack Into Someone's Voicemail Without Their Phone?

I can  get in someone voicemail?

Call the phone and wait for it to go to voicemail

Why do you want to hack someone elses phone anyway if they wanted to check their voicemails they will just do it off they own phone it seems as though your trying to get into someone elses business huh your sick why would you ask that kinda question "how do you hack into someones elses voicemail without their phone" you are sick

I want to hack into my husbands cell phone and read his text messages