Official documentation

Set up Voicemail on iPhone

Apple Support, 2026

Read on October 17, 2026

What it is: Apple's iPhone User Guide page on setting up voicemail, including the Live Voicemail feature that shows a transcript while a caller leaves a message.
How much weight it carries: Official Apple documentation. Carrier and country availability is stated as a limit, and the exact list is set by each carrier.

Facts taken from this source

Apple says that with Live Voicemail on, your iPhone can show a transcription of a caller's voicemail while the caller speaks.
“When a caller is sent to voicemail, your iPhone can display a transcription of the caller’s voicemail as they speak.” (Turn on Live Voicemail)
Apple says Voicemail, Visual Voicemail and Live Voicemail are available only from select carriers in select countries or regions.
“Voicemail, Visual Voicemail, and Live Voicemail are available from select carriers in select countries or regions.” (Note in Set up Voicemail)