To block a number on T-Mobile, your best option is not a single carrier-side feature but one of three effective methods: using the free T-Mobile Scam Shield app for its Personal Number Blocking, or blocking the number directly on your iPhone or Android phone. T-Mobile does not offer a simple, universal "block this number" command at the network level for any specific number you choose, so these three approaches cover your needs for blocking calls and numbers.
How to block a number on T-Mobile: your 3 best options
If you want to stop calls and texts from a specific unwanted number, T-Mobile's official support documents three paths: turn on Scam Block at the network level (which blocks suspected scam calls, not a number you pick), block specific numbers on the phone itself, or use a third-party app such as the free T-Mobile Scam Shield app. Because there is no one-tap carrier-side block for any arbitrary number, the closest carrier-supported method is Scam Shield's Personal Number Blocking, followed by the built-in blocking tools on your iPhone or Android device. If the phone does not offer blocking options, T-Mobile offers alternatives like Family Allowances.
Block a specific number with the T-Mobile Scam Shield app
The T-Mobile Scam Shield app is free for all T-Mobile customers and includes a feature called Personal Number Blocking that lets you block specific phone numbers you choose. This is the closest carrier-supported method to block a number you select.
- Download the free T-Mobile Scam Shield app from your device's app store.
- Open the app and look for the Personal Number Blocking setting.
- Enter the phone number you want to block and confirm.
Scam Shield also includes Scam ID, Scam Block, and Caller ID. Note that Scam Block (turned on in the app) blocks calls labeled "Scam Likely" at the network level, which is different from blocking a specific number you choose yourself.
Block a number directly on your iPhone
Blocking a number on an iPhone is the most common method for iPhone users and works from the Phone app's recent calls list or from a contact card.
- Open the Phone app and tap the Recents tab to see your call history.
- Find the number you want to block and tap the blue "i" icon next to it.
- Scroll down and tap "Block this Caller."
You can also block a number from a contact card by opening the Contacts app, selecting the contact, scrolling to the bottom, and tapping "Block this Caller." Blocked callers cannot reach you by phone or text, and their calls go straight to voicemail.
Block a number directly on your Android phone
The general steps to block a number on an Android phone are similar across most devices, but exact menu names may vary by manufacturer. T-Mobile recommends checking its device-specific support pages for your exact phone model if you cannot find the option.
- Open the Phone app and tap the Recents or Call log tab.
- Tap the number you want to block to open its details.
- Look for an option like "Block number," "Block/report spam," or a three-dot menu that contains the block command.
- Confirm the block when prompted.
On many Android phones, you can also block a number from the Contacts app by opening the contact, tapping the menu, and selecting "Block." Blocked numbers cannot call or text you, and their calls are sent to voicemail or silently rejected depending on your device.
A note on T-Mobile's Scam Block for 'Scam Likely' calls
T-Mobile's Scam Block is a network-level feature that blocks calls identified as "Scam Likely" before they reach your phone. This is different from blocking a specific number you choose. To turn on Scam Block, you can dial #662# from your T-Mobile device, toggle it on in the Scam Shield app, or log in to My T-Mobile or the T-Mobile app and turn it on there. To turn it off, dial #632#. To check whether it is on or off, dial #787#. Dial #664# to enable Scam ID. Scam Block can be turned on for DIGITS numbers. Scam Block applies only to calls T-Mobile flags as potential scams, not to any number you manually select.
Frequently Asked Questions
Can I block text messages too?
Yes. When you block a number using the Scam Shield app's Personal Number Blocking or the built-in block feature on your iPhone or Android phone, both calls and text messages from that number are blocked. There is no separate process for blocking texts from a specific number.
How do I unblock a number?
To unblock a number, go to the same place you blocked it. On an iPhone, go to Settings > Phone > Blocked Contacts and swipe left or tap Edit to remove the number. On Android, open the Phone app, tap the menu, go to Settings > Blocked numbers, and remove the number. In the Scam Shield app, go to Personal Number Blocking and delete the number from your list.
What happens when a blocked number calls me?
When a blocked number calls, the call is sent directly to voicemail without ringing your phone. The caller does not receive a notification that they have been blocked. Text messages from a blocked number are not delivered to your phone.
Can I block a number using My T-Mobile or the T-Mobile app?
No. Those tools let you turn on Scam Block for scam calls, but not block an individual number you select.
Is there a limit to how many numbers I can block?
Your phone's built-in block list may have a limit depending on the device, but it is typically high enough for normal use.
