You can change your caller ID on iPhone through Settings, but what you can change depends on your carrier and service type

The steps to change your caller ID differ based on whether you use a traditional phone number, a VoIP service, or a business line. For most iPhone users on standard cellular plans, you cannot change the number that appears to others when you call — your carrier controls that. However, if you use a VoIP app, a business phone system, or have a dual SIM setup, you have more control over what displays on the recipient's end.

The most common reason people want to change caller ID is to hide their number temporarily, show a different line for business calls, or fix a number that displays incorrectly. Each situation has a different solution within iPhone's settings or through your carrier.

Key Takeaways

  • Your carrier determines what caller ID appears for standard cellular calls, and you cannot change it through iPhone settings alone.
  • You can hide your number on a per-call basis by enabling "Show My Caller ID" toggle in Settings, then turning it off before you call.
  • VoIP apps like Google Voice, Skype, or business phone systems let you choose which number displays when you call through that app.
  • If your caller ID displays incorrectly, contact your carrier to update the number registered to your account.
  • Dual SIM iPhones can show different caller IDs depending which SIM you use for each call.

Hide your number on individual calls through iPhone Settings

The quickest way to block your caller ID for a single call is to turn off the "Show My Caller ID" setting before you dial. Open Settings, tap Phone, then scroll down to find "Show My Caller ID." Toggle it off, make your call, and the recipient will see "Unknown" or "Private Number" instead of your phone number.

This works for one call only. After you hang up, your caller ID returns to normal for the next call. If you want to hide your number for all outgoing calls, leave this toggle off permanently — but be aware that some people and businesses do not answer calls from hidden numbers, and some carriers charge extra to block caller ID on every call.

This setting applies only to calls made through your carrier's network, not to calls through VoIP apps or other services.

Change caller ID for calls through VoIP apps

If you use Google Voice, Skype, WhatsApp, or a business phone system app, you can set which number displays when you call through that app. Each app handles this differently, so check the app's settings first.

In Google Voice, open the app, tap your profile picture, go to Settings, then Phone Numbers. You can add multiple numbers and choose which one displays for outgoing calls. In Skype, go to Settings, tap Call Settings, and select which Skype number or linked phone number shows as your caller ID. Business apps like Slack, Microsoft Teams, or dedicated phone systems often let you choose your display number in their calling settings as well.

The number you display must be one you own or have permission to use. You cannot display a random number or someone else's number — the app will only let you choose from numbers already linked to your account.

Fix a caller ID that displays the wrong number

If your caller ID shows a number that is not yours, or displays incorrectly to certain people, contact your carrier directly. They maintain the caller ID information tied to your phone number in their system, and only they can update it.

Call your carrier's customer service line and explain that your caller ID is displaying incorrectly. Have your account number and phone number ready. They will ask you what number should display and may request proof of identity. The update usually takes a few hours to a few days to take effect across their network.

If you recently switched carriers or ported your number from another provider, the old caller ID information may still be cached in some systems. Your new carrier can request a refresh, but this sometimes takes longer than a standard update.

Use a different caller ID on dual SIM iPhones

If you have an iPhone 13 or newer with dual SIM capability, you can set up two different phone numbers and choose which one displays for each call. When you dial, you will see an option to select which SIM to use — the caller ID that displays will match whichever SIM you selected.

To set this up, go to Settings, tap Phone, then Calls on Other Devices or Default Line, and choose which SIM is your default. When you make a call, you can override the default by swiping up during the dial pad to see both SIM options and pick the one you want to use for that specific call.

This is useful if you have a personal number and a business number, or if you use two carriers. Each SIM displays its own caller ID to the person you are calling.

What you cannot change about your caller ID

You cannot change your caller ID to display someone else's number, a fake number, or a number you do not own. Carriers and VoIP services block this to prevent fraud and spoofing. If an app or service claims to let you display any number you want, it is either breaking the law or will not actually work when you try to use it.

You also cannot change your caller ID through third-party apps that claim to do so — these apps either do not work, violate carrier terms of service, or are scams. The only legitimate ways to change what displays are through your carrier's official settings, your carrier's customer service, or through VoIP apps that let you choose from numbers you actually own.

Frequently Asked Questions

Can I hide my caller ID for all calls, not just one?

Yes. Go to Settings, tap Phone, scroll to "Show My Caller ID," and toggle it off. Your number will display as "Unknown" or "Private" for all outgoing calls. Some carriers charge a monthly fee for this service, so check with your carrier first. Keep in mind that many people and businesses do not answer calls from hidden numbers.

Why does my caller ID show the wrong number?

Your carrier controls what number displays, and it should match the phone number on your account. If it does not, contact your carrier's customer service to update it. This can happen after switching carriers, porting a number, or if there is an error in their system. Updates usually take a few hours to a few days.

Can I use a business number as my caller ID on my personal iPhone?

Only if you use a VoIP app or business phone system that is set up to display that number. Standard carrier calls will always display your personal phone number. If your business uses a phone system app like Slack, Teams, or a dedicated business line app, you can make calls through that app to display your business number instead.

Does changing caller ID work for text messages?

No. Text messages always display your phone number — you cannot hide it or change it to a different number. The only exception is if you send messages through a VoIP app or business messaging system, which may display differently depending on how that service is configured.

Is it illegal to hide my caller ID?

Hiding your caller ID is legal in most places for personal calls. However, some states and countries have restrictions on hiding your number when calling businesses, government agencies, or emergency services. Check your local laws. Displaying a false or spoofed number — pretending to be someone else — is illegal in most jurisdictions.