Final answer:
When you dial a friend and get a busy signal, waiting for them to call back, leaving a voicemail, or sending a text message are practical options.
Step-by-step explanation:
When you dial a friend on the phone and get a busy signal, you have several options to consider. If the situation is not urgent, you might choose to wait for them to call you back. Alternatively, if their phone allows it, you can leave a voicemail explaining who you are and why you called, which might prompt them to return your call when they are available. Continuously dialing can sometimes be ineffective and may come across as insistent, so a more modern approach would be to send a text message if the person’s phone is capable of receiving texts, as it allows them to get back to you at their convenience.