iPhone call forwarding vs Live Voicemail: why no-answer calls never reach the forward number

1. Live Voicemail is answering first

Live Voicemail shows you a live transcript while someone leaves a message, and lets you pick up halfway through. It's handy. But when it's on, your iPhone can take an unanswered call itself, before your carrier's "no answer" forwarding gets a chance to send it on.

Phone-service companies that rely on no-answer forwarding tell their iPhone customers to switch it off for exactly this reason.

To turn it off: Settings → Apps → Phone → Live Voicemail. Then test.

2. New callers are being silenced

On recent versions of iOS, go to Settings → Apps → Phone and look at how unknown numbers are handled. If it's set to Silence, calls from numbers you haven't saved are silenced and sent to voicemail. On older versions this is a switch called Silence Unknown Callers. Apple notes that with it on, unknown numbers go straight to Live Voicemail without ringing you.

For a business, every new customer is an unknown number. Set it to Never, or to Ask Reason for Calling if you want the caller to say who they are first.

3. A Focus kept the phone quiet

Do Not Disturb, Work, Sleep, and other Focus modes can silence calls. The call still comes in, but you don't hear it, so it rolls on to voicemail. In Settings → Focus, pick the Focus you use and allow calls from the people who need to reach you. You can also allow repeated calls, which lets a second call from the same person within three minutes come through.

4. Something declined the call

If you tap decline, or press the side button twice, Apple says the call goes to voicemail. It doesn't wait for forwarding. The same thing happens if a paired watch or another device declined it.

Ask your carrier what's actually set

Your carrier can read back every forwarding rule on your line: all calls, no answer, busy, and unreachable. Ask them plainly: "Where do my unanswered calls go right now?" Often the answer is "to your voicemail box," and that's the rule you need changed.

If the problem is that the phone gives up too fast, here's how to make your phone ring longer before it forwards.

What varies by carrier

The codes, the number of rings before forwarding, and whether you can change any of it yourself all depend on your carrier and plan. Verizon, for example, uses *72 for forwarding all calls and *71 for forwarding when you're busy or don't answer, and *73 turns both off. Other carriers use longer codes. Check your carrier's own help page before you dial anything.

Under the hood

A call to a mobile number reaches the carrier's switch first. From there:

• Unconditional forwarding (CFU) redirects before the handset rings. iOS exposes this as the Call Forwarding switch on GSM-type networks.
• Conditional forwarding (no reply, busy, not reachable) is a carrier rule. The handset rings, a network timer runs, and on expiry the network routes to the forward-to number, which by default is the voicemail platform.
• Live Voicemail puts a voicemail function on the device. Testers and phone-service vendors report that with it enabled, the iPhone takes unanswered and busy calls locally, which pre-empts carrier no-reply forwarding. Apple says calls still go to carrier voicemail when the phone is off or out of range.
• Call screening and Focus act on the handset: they change whether you're alerted, and in the Silence case route unknown callers to voicemail.

On GSM-type carriers, the standard interrogation code *#61# usually returns the no-reply forward-to number. Verizon uses its own star codes instead.

Short close

Turn off Live Voicemail, stop silencing unknown callers, let calls through your Focus, and make sure you set up "no answer" forwarding with your carrier, not "all calls" on the phone. Then test with one real call.