If you still remember the password of voicemail on iPhone, you can easily change the password of your voicemail on iPhone. When you forget the voicemail password, you should retrieve the information from the Email or call the carrier directly for a solution.
That way you'll get to know exactly what other people hear when they call your phone and one last thing I wanted to show you. If you don't see that play on record option on the bottom, you don't have visual voicemail. Set up on your phone and that's through your provider. So if you have at and T sprint T-Mobile or any other provider, you need to have visual voicemail.

Google and the three major U.S. carriers, including Verizon, AT&T, and T-Mobile, will all support a new communications protocol on Android smartphones starting in 2022, a move that puts pressure on Apple to adopt a new cross-platform messaging standard and may present a challenge to iMessage. Verizon recently announced that it is planning to adopt Messages by Google as its default messaging...
I wish that were the solution, but if your cell phone is turned off, out of range, or in airplane mode, the US Mobile voicemail kicks in immediately, without even trying to ring the phone. Google Voice doesn’t have a chance.