Ever wondered how to hide your caller ID on your Samsung S21 Ultra? Maybe you want to make a call without the recipient knowing it’s you, or perhaps you value your privacy. Whatever the reason, hiding your caller ID is a simple process, and this guide will walk you through it step-by-step. We'll cover the built-in settings on your Samsung S21 Ultra, as well as alternative methods using prefixes and carrier-specific options. By the end of this article, you'll be a pro at managing your caller ID and making anonymous calls whenever you need to. Let’s dive in and get started!

Understanding Caller ID and Why Hide It?

Before we get into the how-to, let's quickly cover the basics. Caller ID, or Calling Line Identification (CLI), is a service that displays your phone number to the person you are calling. It's a standard feature on most phones and helps people screen calls and identify who is trying to reach them. However, there are several reasons why you might want to hide your caller ID. Maybe you're calling a business and don't want them to have your personal number, or perhaps you're making a sensitive call and prefer to remain anonymous. Some people also use it to avoid unwanted calls or to maintain a level of privacy in certain situations.

Hiding your caller ID can be useful in various scenarios. For instance, if you're a freelancer making initial contact with potential clients, you might not want them to have your personal number right away. Or, if you're calling about a classified ad or a sensitive matter, keeping your number private can protect you from potential spam or unwanted attention. It's all about controlling your personal information and deciding when and with whom you want to share it. Plus, it’s super easy to do once you know the steps, especially on a feature-packed phone like the Samsung S21 Ultra.

Method 1: Using Your Samsung S21 Ultra's Built-in Settings

The easiest way to hide your caller ID on your Samsung S21 Ultra is by using the built-in settings. This method allows you to block your number on a per-call basis or as the default setting for all outgoing calls. Here’s how to do it:

Hiding Your Caller ID for a Single Call

If you only want to hide your caller ID for one specific call, follow these steps:

1. Open the Phone App: Start by opening the phone app on your Samsung S21 Ultra. This is the app you use to make calls.
2. Go to the Keypad: Tap on the keypad icon, usually located at the bottom of the screen. This will bring up the dial pad where you enter phone numbers.
3. Enter the Prefix: Before dialing the number, enter the prefix code to block your caller ID. In many countries, this code is #31#. So, you would enter #31# followed by the phone number you want to call. For example, #31#1234567890.
4. Make the Call: After entering the prefix and the phone number, tap the call button. Your call will be made without your caller ID being displayed to the recipient.

This method is quick and easy for those times when you only need to hide your number temporarily. Just remember to add the prefix each time you make the call.

Hiding Your Caller ID for All Calls

If you prefer to hide your caller ID for all outgoing calls, you can change the default settings on your Samsung S21 Ultra. Here’s how:

1. Open the Phone App: Again, start by opening the phone app on your Samsung S21 Ultra.
2. Access the Settings Menu: Tap the three dots (menu icon) usually located in the top right corner of the screen. This will open a drop-down menu.
3. Go to Settings: From the drop-down menu, select "Settings". This will take you to the phone app's settings page.
4. Find Supplementary Services or Call Settings: Look for an option like "Supplementary Services" or "Call Settings". The exact wording may vary depending on your carrier and software version.
5. Caller ID: Tap on "Caller ID".
6. Hide Number: You will see options like "Network Default", "Show Number", and "Hide Number". Select "Hide Number" to block your caller ID for all outgoing calls.
7. Confirm Your Choice: You may be prompted to confirm your choice. If so, confirm that you want to hide your caller ID.

Now, all your outgoing calls will be made without displaying your number. Keep in mind that this setting will remain active until you change it back. So, if you want to show your number again, you’ll need to go back into the settings and select “Show Number” or “Network Default”.

Method 2: Using Carrier-Specific Codes

Another way to hide your caller ID is by using carrier-specific codes. These codes may vary depending on your mobile carrier and location. Here are some common carrier codes:

• Verizon: *67 before the number.
• AT&T: *67 before the number.
• T-Mobile: *67 before the number.
• Sprint: *67 before the number.

To use these codes, simply dial *67 followed by the phone number you want to call. For example, *671234567890. This will block your caller ID for that specific call. Keep in mind that these codes may not work in all areas or with all carriers, so it’s always a good idea to check with your carrier to confirm the correct code for your region.

Method 3: Contacting Your Mobile Carrier

If you’re having trouble hiding your caller ID using the methods above, or if you want to set up permanent caller ID blocking, you can contact your mobile carrier directly. They can provide you with specific instructions or enable a permanent block on your account. This might involve additional fees or require you to sign up for a specific service, so be sure to ask about any associated costs before proceeding.

When you contact your carrier, explain that you want to hide your caller ID for all outgoing calls. They may have different options available, such as a feature that blocks your number by default or a temporary block that you can enable and disable as needed. They can also help you troubleshoot any issues you’re experiencing with the built-in settings on your Samsung S21 Ultra.

Troubleshooting Common Issues

Sometimes, you might encounter issues when trying to hide your caller ID. Here are some common problems and how to troubleshoot them:

• Code Not Working: If the prefix code *#31# or the carrier-specific code *67 isn’t working, it could be due to several reasons. First, make sure you’re entering the code correctly, without any extra spaces or characters. Also, check with your carrier to ensure that the code is valid in your region. Some carriers may use different codes or require you to have a specific service enabled. Finally, try restarting your phone to see if that resolves the issue.
• Settings Not Available: If you can’t find the Caller ID settings in your phone app, it could be due to your carrier or software version. Some carriers may disable or hide these settings. In this case, your best bet is to contact your carrier directly for assistance. They may be able to enable caller ID blocking on their end.
• Caller ID Still Showing: Even after hiding your caller ID, your number might still show up for certain recipients. This could be because the recipient’s phone system is overriding the caller ID block, or because they have a caller ID service that ignores the block. Unfortunately, there’s not much you can do in these situations, as it’s up to the recipient’s phone system to honor the caller ID block.

Why Isn't My Caller ID Hidden?

There could be several reasons why your caller ID isn't hidden even after you've followed the steps to block it. One common reason is that some mobile carriers or phone systems override the caller ID blocking feature. This is more likely to happen with business phone systems or older landlines. Additionally, some call recipients may have a caller ID service that is designed to reveal blocked numbers, although these services are less common.

Another possibility is that you haven't correctly configured the settings on your Samsung S21 Ultra. Double-check that you've selected the