Secret Codes guide
AT&T ActiveArmor on iPhone: How It Works
By Muhammad Shahid · · 3 min read
Quick answer
AT&T's spam blocking and call screening service. ActiveArmor blocks calls AT&T has identified as fraudulent and labels suspected spam. Automatic fraud blocking is applied at network level on most lines; the app adds a personal block list, nuisance-call controls and — on the paid tier — reverse number lookup.
| What it does | AT&T's spam blocking and call screening service. |
|---|---|
| Published for | AT&T |
| Type | Carrier specific |
AT&T's spam blocking and call screening service. This page explains what it does, how to use it on an iPhone and which carriers it applies to.
I build Secret Codes: IMEI & Carrier, a free iPhone app with 317 checked codes and guides, including this one. If you would rather tap than memorise, get Secret Codes on the App Store.
What is AT&T ActiveArmor?
ActiveArmor blocks calls AT&T has identified as fraudulent and labels suspected spam. Automatic fraud blocking is applied at network level on most lines; the app adds a personal block list, nuisance-call controls and — on the paid tier — reverse number lookup.
How do I do it?
- Install AT&T ActiveArmor from the App Store.
- Sign in with your AT&T account.
- Turn on spam and fraud call blocking.
- In Settings › Phone › Call Blocking & Identification, confirm ActiveArmor is enabled.
Which carriers does this apply to?
| Published for | AT&T |
|---|---|
| Type | Carrier specific |
| Good to know | AT&T lines. Network-level fraud blocking applies automatically; the app is optional. |

Related verizon, at&t and t-mobile codes
- *777#: Check Prepaid Balance
- #225#: Check Your Balance
- *639#: Check Upgrade Eligibility
- #646#: Check Minutes Used
- *729: Make A Payment
- #932#: Check Data Usage
See all verizon, at&t and t-mobile codes or every category of iPhone codes.
How Secret Codes helps
Secret Codes keeps this and every other entry a search away. Pick your carrier once and each entry says whether it is published for your line. You can save favourites, add a private note, and record whether a code worked on your line.
Frequently asked questions
What is AT&T ActiveArmor on iPhone?
AT&T's spam blocking and call screening service. ActiveArmor blocks calls AT&T has identified as fraudulent and labels suspected spam.
What else should I know about AT&T ActiveArmor?
Automatic fraud blocking is applied at network level on most lines; the app adds a personal block list, nuisance-call controls and — on the paid tier — reverse number lookup.
What are the steps for AT&T ActiveArmor?
1. Install AT&T ActiveArmor from the App Store. 2. Sign in with your AT&T account. 3. Turn on spam and fraud call blocking. 4. In Settings › Phone › Call Blocking & Identification, confirm ActiveArmor is enabled.
Where do I find AT&T ActiveArmor?
In the carrier's or Apple's own app, as described on this page.
Is there a dial code for AT&T ActiveArmor?
No keypad code is listed for it. The way to do it is: App.
Which carriers does AT&T ActiveArmor work on?
It is published for AT&T. AT&T lines. Network-level fraud blocking applies automatically; the app is optional.
Does AT&T ActiveArmor work on Android phones too?
These steps are for iPhone. Android phones have their own menus.
Will AT&T ActiveArmor work outside the US?
The iPhone steps stay the same, although some features depend on your carrier and region.
What if AT&T ActiveArmor does not work on my iPhone?
Check that it applies to your carrier first, because carriers decide which services they offer and can change them. If it should apply to your line, contact your carrier.
What is related to AT&T ActiveArmor?
*777#: Check Prepaid Balance. The balance code for AT&T PREPAID lines.
What else is in this category?
#225#: Check Your Balance. #BAL# — your current T-Mobile balance.
Can I find AT&T ActiveArmor in an app?
Yes. Secret Codes, a free iPhone app, includes it with its steps and carrier details.