# *#35# on iPhone: Check Incoming Call Barring URL: https://byshahid.com/blog/check-incoming-call-barring-star-hash-35-iphone/ App: Secret Codes: IMEI & Carrier (https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322) Author: Muhammad Shahid Updated: 2026-11-04 > *#35#: Ask whether incoming calls are being blocked at the network. A read only interrogation of barring of all incoming calls. No password, no change of state. Together with the outgoing status string this is a reasonable two step check when calls are behaving strangely. - **Code:** *#35# - **What it does:** Ask whether incoming calls are being blocked at the network. - **Published for:** AT&T and T-Mobile - **Type:** Support varies Ask whether incoming calls are being blocked at the network. This page explains what `*#35#` 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 *#35# do? A read only interrogation of barring of all incoming calls. No password, no change of state. Together with the outgoing status string this is a reasonable two step check when calls are behaving strangely. If both answer with a clean not active, barring is off the table as an explanation and the problem lies with forwarding, provisioning or the device. ## How do I use *#35#? - Open the Phone app and tap Keypad. - Type *#35# 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 | Safe to dial. An error simply means the network does not expose incoming barring for your line, which is the norm in the US. | _Screenshot: The Secret Codes detail screen shows the steps, the carriers and an Open in Phone button._ ## Related call barring and sim pin codes - [#35*0000#: Cancel Incoming Call Barring](/blog/cancel-incoming-call-barring-hash-35-star-0000-iphone/) - [*351*0000#: Bar Incoming Calls While Roaming](/blog/bar-incoming-calls-while-roaming-star-351-star-0000-iphone/) - [*35*0000#: Bar All Incoming Calls](/blog/bar-all-incoming-calls-star-35-star-0000-iphone/) - [#351*0000#: Cancel Roaming Incoming Barring](/blog/cancel-roaming-incoming-barring-hash-351-star-0000-iphone/) - [*#332#: Check Except-Home Barring](/blog/check-except-home-barring-star-hash-332-iphone/) - [*#351#: Check Roaming Incoming Barring](/blog/check-roaming-incoming-barring-star-hash-351-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 *#35# do on iPhone? Ask whether incoming calls are being blocked at the network. A read only interrogation of barring of all incoming calls. No password, no change of state. Together with the outgoing status string this is a reasonable two step check when calls are behaving strangely. ### What else should I know about *#35#? If both answer with a clean not active, barring is off the table as an explanation and the problem lies with forwarding, provisioning or the device. ### What are the steps for *#35#? 1. Open the Phone app and tap Keypad. 2. Type *#35# exactly as written. 3. Press the green Call button and wait for the result. ### Where do I use *#35#? On the keypad of the Phone app. ### Do I need to press Call after typing *#35#? Yes. Type it on the Phone keypad, then press the green Call button. ### Is *#35# 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 *#35# work on? It is published for AT&T and T-Mobile. Safe to dial. An error simply means the network does not expose incoming barring for your line, which is the norm in the US. ### Does *#35# 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 *#35# 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 *#35# 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 *#35#? #35*0000#: Cancel Incoming Call Barring. Start receiving calls again after *35*. ### What else is in this category? *351*0000#: Bar Incoming Calls While Roaming. Refuse incoming calls only when you are on a foreign network. ## Sources - [3GPP TS 22.030: Man-Machine Interface of the phone](https://www.3gpp.org/dynareport/22030.htm)