# #233 on iPhone: Boost Mobile: Add Money URL: https://byshahid.com/blog/boost-mobile-add-money-hash-233-iphone/ App: Secret Codes: IMEI & Carrier (https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322) Author: Muhammad Shahid Updated: 2026-11-04 > #233: #ADD — make a payment without your account PIN. 233 spells ADD. It opens Boost's automated payment system, and Boost documents it as the route that does not require your account PIN, which is the practical difference from going through the main 611 menu. - **Code:** #233 - **What it does:** #ADD — make a payment without your account PIN. - **Network:** T-Mobile and AT&T - **Type:** Carrier specific #ADD — make a payment without your account PIN. This page explains what `#233` 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 #233 do? 233 spells ADD. It opens Boost's automated payment system, and Boost documents it as the route that does not require your account PIN, which is the practical difference from going through the main 611 menu. It accepts cards as well as Boost replenishment cards and PIN vouchers, so it is also how you redeem a physical top-up bought in a store. **Important:** The automated system asks for payment card or voucher numbers. Never enter them because an inbound call or text told you to. ## How do I use #233? - Open the Phone app and tap Keypad. - Type #233 exactly as written. - Press the green Call button and wait for the result. ## Who is this for? | Network | T-Mobile and AT&T | | Type | Carrier specific | | Good to know | Boost Mobile lines only. | _Screenshot: The Secret Codes detail screen shows the steps, the carriers and an Open in Phone button._ ## Related prepaid and mvno codes - [#225: Boost Mobile: Check Your Balance](/blog/boost-mobile-check-your-balance-hash-225-iphone/) - [611: Boost Mobile Customer Care](/blog/boost-mobile-customer-care-iphone/) - [*99: Metro by T-Mobile: Pay Your Bill](/blog/metro-by-t-mobile-pay-your-bill-star-99-iphone/) - [611: Cricket Wireless Support](/blog/cricket-wireless-support-iphone/) - [*611: Metro by T-Mobile Customer Service](/blog/metro-by-t-mobile-customer-service-star-611-iphone/) - [Cricket Wireless: Get Your Balance by Text](/blog/cricket-wireless-get-your-balance-by-text-iphone/) See all [prepaid and mvno codes](/blog/iphone-codes/prepaid-and-mvno/) 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 #233 do on iPhone? #ADD — make a payment without your account PIN. 233 spells ADD. It opens Boost's automated payment system, and Boost documents it as the route that does not require your account PIN, which is the practical difference from going through the main 611 menu. ### What else should I know about #233? It accepts cards as well as Boost replenishment cards and PIN vouchers, so it is also how you redeem a physical top-up bought in a store. ### What are the steps for #233? 1. Open the Phone app and tap Keypad. 2. Type #233 exactly as written. 3. Press the green Call button and wait for the result. ### Where do I use #233? On the keypad of the Phone app. ### Do I need to press Call after typing #233? Yes. Type it on the Phone keypad, then press the green Call button. ### Is #233 a hidden or secret code? No. It is a published service, not a hidden menu. iPhones do not have Android-style engineering menus. ### Who can use #233? Customers of the carrier named on this page. Boost Mobile lines only. ### Is there anything to watch out for with #233? The automated system asks for payment card or voucher numbers. Never enter them because an inbound call or text told you to. ### Does #233 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 #233 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 #233 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 #233? #225: Boost Mobile: Check Your Balance. #BAL — balance and next payment date. ## Sources - [Apple Support: Find the serial number or IMEI on your iPhone](https://support.apple.com/en-us/108037) - [Wikipedia: USSD codes](https://en.wikipedia.org/wiki/Unstructured_Supplementary_Service_Data)