Verified Caller ID
All Unlisted phone numbers automatically support verified caller ID.
This means that anyone you call will see a Verified checkmark to confirm that you are the real owner of the number. This fights against spoofed calls and lets your call recipients know that calls they receive from your number are actually from you.
Why Does This Matter?
Caller ID is inherently insecure. Think of caller ID like a return address on an envelope: you can write any address that you want as the return address. To recipient, it looks like it came from that address, no matter who actually sent it.
There are ongoing efforts to make caller ID more secure. The main effort is a joint collaboration of telephony providers called SHAKEN/STIR. Despite the clever James Bond reference, this actually fights against spy-like call spoofing.
All of our numbers automatically participate in this program. If someone receives a call from you, it will show as "Verified". If someone else spoofs your number, the recipient of the call will not see "Verified", and it may actually show as spam.
On iPhone, this will appear as a "verified" checkmark in the call list.
On some Android phones, recipients of your calls will also see a green checkmark on the incoming call screen.
For all devices, carriers might use this status to show a different caller ID, such as "Spoofed", "Robocall", or "Spam Call". You might have seen this before — now you know where that comes from!
Incoming Calls Will Always Come to You (and Only You)
In any case, caller ID spoofing only affects outgoing calls. If someone calls you back, then the calls will only go to you.
Following the mail analogy, if someone sends it to your address, it only goes to you, no matter what someone previously wrote in the return address.