# #33*0000# on iPhone: Cancel Outgoing Call Barring URL: https://byshahid.com/blog/cancel-outgoing-call-barring-hash-33-star-0000-iphone/ App: Secret Codes: IMEI & Carrier (https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322) Author: Muhammad Shahid Updated: 2026-11-04 > #33*0000#: Lift a block on outgoing calls that was set with *33*. The leading hash is the deactivation form of the same service code. It cancels barring of all outgoing calls and nothing else, so any international or incoming barring stays where it is. Replace 0000 with your call barring password. - **Code:** #33*0000# - **What it does:** Lift a block on outgoing calls that was set with *33*. - **Published for:** AT&T and T-Mobile - **Type:** Support varies Lift a block on outgoing calls that was set with *33*. This page explains what `#33*0000#` 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](https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322). ## What does #33*0000# do? The leading hash is the deactivation form of the same service code. It cancels barring of all outgoing calls and nothing else, so any international or incoming barring stays where it is. Replace 0000 with your call barring password. Wrong passwords are rejected by the network without changing anything, but repeated failures can lock the barring password on some networks and only the carrier can reset it. If you are trying to clear a barring condition you did not set and this is refused, the block is far more likely to be an account level restriction such as a past due balance or a fraud hold. Those are invisible to MMI strings and have to be cleared by the carrier. ## How do I use #33*0000#? - Open the Phone app and tap Keypad. - Type #33*0000# exactly as written. - Press the green Call button and wait for the result. ## Which carriers does this apply to? | Published for | AT&T and T-Mobile | | Type | Support varies | | Good to know | Only meaningful where barring was provisioned in the first place. On a typical US line it returns an error even when calls genuinely are blocked, because the block is not a GSM barring service. | _Screenshot: The Secret Codes detail screen shows the steps, the carriers and an Open in Phone button._ ## Related call barring and sim pin codes - [*33*0000#: Bar All Outgoing Calls](/blog/bar-all-outgoing-calls-star-33-star-0000-iphone/) - [*331*0000#: Bar Outgoing International Calls](/blog/bar-outgoing-international-calls-star-331-star-0000-iphone/) - [#331*0000#: Cancel International Call Barring](/blog/cancel-international-call-barring-hash-331-star-0000-iphone/) - [*#331#: Check International Call Barring](/blog/check-international-call-barring-star-hash-331-iphone/) - [*332*0000#: Bar International Calls Except Home](/blog/bar-international-calls-except-home-star-332-star-0000-iphone/) - [#332*0000#: Cancel Except-Home Barring](/blog/cancel-except-home-barring-hash-332-star-0000-iphone/) See all [call barring and sim pin codes](/blog/iphone-codes/call-barring-and-sim/) or [every category of iPhone codes](/blog/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. **Secret Codes: IMEI & Carrier** is free on the App Store: https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322 ## FAQ ### What does #33*0000# do on iPhone? Lift a block on outgoing calls that was set with *33*. The leading hash is the deactivation form of the same service code. It cancels barring of all outgoing calls and nothing else, so any international or incoming barring stays where it is. ### What else should I know about #33*0000#? Replace 0000 with your call barring password. Wrong passwords are rejected by the network without changing anything, but repeated failures can lock the barring password on some networks and only the carrier can reset it. ### What are the steps for #33*0000#? 1. Open the Phone app and tap Keypad. 2. Type #33*0000# exactly as written. 3. Press the green Call button and wait for the result. ### Where do I use #33*0000#? On the keypad of the Phone app. ### Do I need to press Call after typing #33*0000#? Yes. Type it on the Phone keypad, then press the green Call button. ### Is #33*0000# a hidden or secret code? No. It is a published service, not a hidden menu. iPhones do not have Android-style engineering menus. ### Which carriers does #33*0000# work on? It is published for AT&T and T-Mobile. Only meaningful where barring was provisioned in the first place. On a typical US line it returns an error even when calls genuinely are blocked, because the block is not a GSM barring service. ### Does #33*0000# work on Android phones too? It is handled by the carrier or service rather than the iPhone, so it is not tied to one phone brand. Check with your carrier. ### Will #33*0000# work outside the US? It is published for US carriers and services, so do not count on it abroad. Ask your carrier before you travel. ### What if #33*0000# 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 #33*0000#? *33*0000#: Bar All Outgoing Calls. Ask the network to block every outgoing call from your line. ### What else is in this category? *331*0000#: Bar Outgoing International Calls. Block international dialling at the network, not on the handset. ## Sources - [3GPP TS 22.030: Man-Machine Interface of the phone](https://www.3gpp.org/dynareport/22030.htm)