Hi, I created a Sandbox Apple Account in App Store Connect for testing StoreKit / Age Assurance sandbox scenarios. When I try to sign in on an iPhone through: Settings -> Developer -> Sandbox Apple Account I can enter the sandbox account email/password and I successfully receive the email verification code. After entering the email verification code, iOS asks me to add/verify a phone number. When I enter the phone number, I get this error: “Could not connect to iCloud. Verification codes cannot be sent to this phone number at this time. Please try again later.” I did not set any phone number when creating the sandbox tester in App Store Connect. The sandbox tester was created with only name, email, password, and country/region. Context: iPhone has Developer Mode enabled I am signing in via Settings -> Developer -> Sandbox Apple Account I am not trying to sign in through normal iCloud / Apple Account settings The sandbox account email is not used as a normal Apple Account Email verification works Phone verification has failed for more than a day Questions: Is phone verification expected when signing in with a Sandbox Apple Account? Is there a way to use Sandbox Apple Accounts / Age Assurance sandbox scenarios without adding a trusted phone number? Does this error usually mean the phone number is rate-limited/blocked, or that the sandbox account is stuck? Should this be handled by Apple Developer Program Support instead? Thanks!