The "invalid phone number" error means the app or service does not accept the number in the format you entered, usually because the country code is wrong or missing, the number has missing digits or extra non-numeric characters, or the number type is not supported by that service. Fixing this error almost always comes down to correcting the format and country code, and the steps below cover the most common fixes for iPhones, Android devices, and specific apps like LINE.
What the 'Invalid Phone Number' Error Means
The error appears when the system cannot validate the phone number as a real, reachable line in the format it expects. This can happen because you entered the number in the wrong country format, left out digits, included spaces or punctuation the form does not allow, or used a number type (like a virtual or toll-free number) the service does not support.
Quick fixes for an invalid phone number
Start with these universal first steps before diving into device-specific settings. They resolve the majority of invalid number errors.
- Use the full international format: start with a plus sign (+), then the country code, then the national number. For example, +1 for the US, +44 for the UK.
- Remove all spaces, dashes, parentheses, and punctuation. Enter only digits and the plus sign.
- Double-check for missing digits. A typical mobile number has 10 to 15 digits including the country code, depending on the country.
- Re-select the country or region where the phone number was issued if the form has a country picker.
- Make sure the number type is supported for the specific feature you are trying to use, some services block spoofed and fake phone numbers, virtual numbers, or temporary numbers.
Fix an invalid number on iPhone and Apple Pay
Apple devices store your phone number in several places, and an outdated or incorrectly formatted entry in any of them can trigger the error.
- Open Settings > Phone > My Number and confirm the number displayed matches your SIM card exactly, including the country code. Check your own number in Settings > Phone > My Number.
- Go to Settings > [your name] > Sign-In & Security and check the phone number listed for your Apple Account. Edit it to use full international format with no spaces. Check the phone number on your Apple Account in Settings > [your name] > Sign-In & Security.
- For Apple Pay, go to Settings > Wallet & Apple Pay > Transaction Defaults > Phone and make sure the number matches exactly, including country code.
- If you are on the verification code screen and see the option Can't use [phone number], tap it to choose a different trusted number or update the existing one. Apple's trusted-number page says that on the verification code screen you can choose Can't use [phone number]. Apple documents that trusted phone numbers are used for verification and that you can choose Can't use [phone number] on the verification code screen.
Fix an invalid number on Android and Google services
Google's phone-number formatting rules require international format and country-specific digit patterns. Chrome autofill can also insert incorrectly formatted numbers. Google's phone-number formatting guidance uses international formatting and says a real phone number should follow country-specific formatting rules.
- Manually select the correct country code from the dropdown in the form, then type the number in full international format starting with +. The Google-related page says to manually select the correct country code, type the number in full international format, and avoid spaces, dashes, or parentheses.
- Avoid spaces, dashes, or parentheses when entering the number.
- If Chrome autofill keeps inserting a wrong number, go to Chrome > Settings > Autofill > Addresses and more and remove any saved phone numbers that may be interfering. Chrome autofill can interfere and suggests removing saved phone numbers in Chrome > Settings > Autofill > Addresses and more.
Fix an invalid number on LINE and other apps
LINE has specific steps for phone number errors, and the same principles apply to many other messaging and verification apps.
- Go to Settings > General > Keyboard > Text Replacement and delete any phone-number text replacement that might be automatically inserting an outdated or incorrectly formatted number.
- Remember that some services only accept certain number types, for example, landlines may not work for SMS verification, and some apps block spoofed and fake phone numbers.
Still getting the error?
If you have corrected the format and country code and the number is still rejected, there is no universal fix beyond those steps. If the number is still rejected after correcting format and country code, the service says to contact support or carrier help for the number type it supports. Contact the app's support team or your mobile carrier to confirm the number type they support for that service. The carrier can also verify that your number is active and not blocked for verification purposes.
Frequently Asked Questions
Why does my phone show "Invalid Phone Number" when I try to make a call?
This usually means the number you dialed is missing digits, has an incorrect country code, or is not a valid number on the network. Double-check the number and try again, or restart your phone to refresh the network connection.
Why does my phone show "Invalid Phone Number" for incoming calls?
This is typically a temporary network glitch or an issue with the caller's service provider. Restart your phone and ensure your SIM card is properly inserted. If it persists, contact your carrier.
Can a phone number be invalid even if it is correct?
Yes. The number may be correct but unsupported by the service, for example, some apps do not accept VoIP numbers, toll-free numbers, or numbers from certain countries. Check the service's supported number types.
How many phone numbers can I add to my Apple Account?
You can add multiple trusted phone numbers for verification, but each must be in correct international format and supported by your carrier.
What does "Can't use this number?" mean on Apple's verification screen?
It is an option to update or replace the phone number that is not receiving the verification code. Tapping it lets you choose a different trusted number or edit the existing one.
