There are some people who want their cell phone number to remain private. If you are too, and you are an AT&T user who frequently receives calls from unknown numbers and even telemarketers, you can register for a number blocking service and/or join a "Do Not Call" service. Find out how below.
Step
Part 1 of 4: Researching Mobile Numbers
Step 1. Write down the mobile number you want to block
Make sure you write down the 10-digit phone number you want to block.
- AT&T can't block anonymous numbers from phones. If the number you don't like is from a "Private Number" or "Anonymous", you should ask the caller or telemarketer to remove your number from their contact list and stop calling you in the future.
- You should register your mobile number with the " Do Not Call " service, regardless of the wireless service used. This service is the cheapest option to block unwanted phone numbers.
Part 2 of 4: iPhone with iOS7
Step 1. If you are using an iPhone with operating system iOS7 and above, you can block numbers from your iPhone
Step 2. For older iPhones or other phone brands, continue to the next section
Part 3 of 4: Joining a Do Not Call Layanan Service
Step 1. Call the Do Not Call service office using the mobile number you want to block from telemarketers
The number for this service is (888) 382-1222.
Step 2. Follow the instructions to register
Your mobile number will be registered automatically, but you may be asked to answer some questions about the number.
Step 3. Wait for 31 days, until the number is added to the service
Step 4. Ask the telemarketer to remove your name and number from their list
This will probably solve this problem.
Step 5. Ask for the business name and number of the telemarketer, if you are still receiving calls from them
They have violated the Do Not Call laws.
Step 6. File your complaint for the Do Not Call service at
Telemarketers who violate can be subject to fines.
Part 4 of 4: Buying AT&T Smart Limits
Step 1. Visit
You can also search for "Smart Limits for Wireless" in the search box at
Step 2. Click the "Order Now" button on the right side of the page
The service is free for 90 days, then costs IDR 65,000 per month per phone on the account.
Step 3. Log in to your AT&T Wireless account when prompted
You must have proper login information and rights to be able to make changes to your account, to order Smart Limits.
You can also go to an AT&T Wireless store with a copy of your most recent bill, or call the AT&T customer service number and provide your account number
Step 4. Locate the mobile number to block
Step 5. Click the Wireless tab if you are not prompted to order Smart Limits on your mobile screen
Step 6. Select the phone to which you want to add Smart Limits
Provide complete information when prompted, until the transaction is complete.
Step 7. Manage Smart Limits from your Wireless account
Write down up to 30 phone numbers to block from calling or texting you.