Hi there, If you're "In call" it means the call has connected and the person you're calling has answered the call. If you're making an "outgoing call" it's still ringing and they haven't answered yet. How do I delete a message in my outbox?
Android phones are made by a variety of different manufacturers, so saving voicemails differs slightly depending on the model you own. But there are some general steps you can follow to save those important messages.

Call your iPhone from another phone and try to leave yourself a voicemail. Go to the keypad and press and hold the number 1, or press the Call Voicemail button. This dials voicemail. Check if you have any missed messages. On the Voicemail screen, tap Greeting. Then change your greeting to either custom or default. If you have more than one
Rehearse or write down your message before recording it. Remember that old saying “practice makes perfect?” It’s certainly true when it comes to creating an electronic greeting. The more you’ve rehearsed, the easier the message will be to restate. If you don’t have time to practice, writing down the greeting before recording it – and then reading it aloud from the paper – may help you stay focused on the correct wording.