# #436# on iPhone: T-Mobile Inbound Caller ID Name URL: https://byshahid.com/blog/t-mobile-inbound-caller-id-name-hash-436-iphone/ App: Secret Codes: IMEI & Carrier (https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322) Author: Muhammad Shahid Updated: 2026-11-04 > #436#: Turn on the caller name lookup for incoming calls. This controls whether T-Mobile looks up and sends the name attached to an incoming number, so the iPhone can show a name for callers who are not in your contacts. #436# turns the display on and #437# turns it off. - **Code:** #436# - **What it does:** Turn on the caller name lookup for incoming calls. - **Published for:** T-Mobile - **Type:** Carrier specific Turn on the caller name lookup for incoming calls. This page explains what `#436#` 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 #436# do? This controls whether T-Mobile looks up and sends the name attached to an incoming number, so the iPhone can show a name for callers who are not in your contacts. #436# turns the display on and #437# turns it off. The name comes from a national caller-name database, not from the caller's own phone, so it is often a business name or a registered subscriber name and it is sometimes stale or missing entirely. This is separate from Apple's own contact matching and from Scam ID labelling, both of which keep working regardless of this setting. ## How do I use #436#? - Open the Phone app and tap Keypad. - Type #436# exactly as written. - Press the green Call button and wait for the result. ## Which carriers does this apply to? | Published for | T-Mobile | | Type | Carrier specific | | Good to know | T-Mobile lines. Name data comes from a third-party database and is not guaranteed to be present or current. | _Screenshot: The Secret Codes detail screen shows the steps, the carriers and an Open in Phone button._ ## Related more carrier and n11 codes - [#634#: Turn Off T-Mobile Scam ID](/blog/turn-off-t-mobile-scam-id-hash-634-iphone/) - [+1-505-998-3793: T-Mobile Support From Overseas](/blog/t-mobile-support-from-overseas-iphone/) - [#664#: Turn On T-Mobile Scam ID](/blog/turn-on-t-mobile-scam-id-hash-664-iphone/) - [888-944-9400: UScellular Customer Service](/blog/uscellular-customer-service-iphone/) - [#999#: T-Mobile Prepaid Account Balance](/blog/t-mobile-prepaid-account-balance-hash-999-iphone/) - [+[number]: Dial Internationally With Plus](/blog/dial-internationally-with-plus-iphone/) See all [more carrier and n11 codes](/blog/iphone-codes/more-carrier-codes/) 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. This entry is part of Secret Codes Pro. **Secret Codes: IMEI & Carrier** is free on the App Store: https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322 ## FAQ ### What does #436# do on iPhone? Turn on the caller name lookup for incoming calls. This controls whether T-Mobile looks up and sends the name attached to an incoming number, so the iPhone can show a name for callers who are not in your contacts. ### What else should I know about #436#? #436# turns the display on and #437# turns it off. The name comes from a national caller-name database, not from the caller's own phone, so it is often a business name or a registered subscriber name and it is sometimes stale or missing entirely. ### What are the steps for #436#? 1. Open the Phone app and tap Keypad. 2. Type #436# exactly as written. 3. Press the green Call button and wait for the result. ### Where do I use #436#? On the keypad of the Phone app. ### Do I need to press Call after typing #436#? Yes. Type it on the Phone keypad, then press the green Call button. ### Is #436# 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 #436# work on? It is published for T-Mobile. T-Mobile lines. Name data comes from a third-party database and is not guaranteed to be present or current. ### Does #436# 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 #436# 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 #436# 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 #436#? #634#: Turn Off T-Mobile Scam ID. Stop labelling calls as Scam Likely. ### What else is in this category? +1-505-998-3793: T-Mobile Support From Overseas. T-Mobile international roaming care, dialable from abroad. ## Sources - [Verizon Support](https://www.verizon.com/support/)