# How to Change Phone Authentication?

Category: Account Functions › SMS Issues  
Source: https://help.coinunited.io/en/articles/how-to-change-phone-authentication  
Last updated: 2026-09-30

## CoinUnited.io APP

1. Go to "User" > "Security" on your CoinUnited.io APP

2. Tap "Phone Authentication"

![CoinUnited.io APP](https://cu-api.com/helpcenter/uploads/phone_app_0792146d0c.webp)

3. Tap "Change Phone Authentication"

![CoinUnited.io APP (2)](https://cu-api.com/helpcenter/uploads/change_phone_app_402449c9a1.webp)

4. Read the notes carefully and tap "Confirm"

![CoinUnited.io APP (3)](https://cu-api.com/helpcenter/uploads/phone_popup_app_bdfdfe99a2.webp)

5. Enter your new phone number, new sms verification code, current sms, email, and google 2FA verification code. Then, tap "Submit"

![CoinUnited.io APP (4)](https://cu-api.com/helpcenter/uploads/add_phone_app_cf25a97127.webp)

Your phone number was successfully changed. For safety reasons, no withdrawals can be made within 24 hours after the change.

## CoinUnited.io Web Platform

1. Go to CoinUnited.io Web Platform, hover your mouse on the "User Icon" at the top right, then click "Account and Security"

![CoinUnited.io Web Platform](https://cu-api.com/helpcenter/uploads/security_pc_92d1c83814.webp)

2. Go to Phone Authentication, then click "Change"

![CoinUnited.io Web Platform (2)](https://cu-api.com/helpcenter/uploads/change_phone_pc_ad71024bce.webp)

3. Read the notes carefully and click "Confirm"

![CoinUnited.io Web Platform (3)](https://cu-api.com/helpcenter/uploads/phone_popup_pc_eaab898023.webp)

4. Enter your new phone number, new sms verification code, current sms, email, and google 2FA verification code. Then, click "Confirm"

![CoinUnited.io Web Platform (4)](https://cu-api.com/helpcenter/uploads/addphone_pc_6a31573dd9.webp)

Your phone number was successfully changed. For safety reasons, no withdrawals can be made within 24 hours after the change.

## Need More Help?

For further questions or issues, please visit our [Help Center](https://help.coinunited.io/) or use our chatbot for assistance.

We're here to help. Happy trading!