Our universal-purchase app (iOS + macOS, StoreKit 2) offers a 14-day trial as a non-consumable priced ¥0/free in all storefronts (approved, available everywhere), plus a paid non-consumable unlock. Since late September we have 3 separate Apple Accounts (Japan storefront) where the iPhone purchase flow fails: Product.products(for:) returns the product, the App Store purchase sheet appears with the correct product and account. After confirming, the sheet shows "支払いを完了できませんでした" (Payment could not be completed). No .success result. Redeeming a FREE one-time offer code for the paid non-consumable (via the apps.apple.com/redeem URL) fails the same way on the same iPhones. The very same Apple Account, same day, on the Mac app: both the ¥0 purchase and the offer code succeed immediately, and the entitlement then shows up on the iPhone through Transaction.currentEntitlements. OS correlation so far: iOS 27.0.1: fails (2 accounts) iOS 26.7.1: fails (1 account) iOS 26.6.2: succeeds Sales and Trends shows 9 iPhone + 1 iPad successful trial purchases between Sep 26 and Oct 12, so this is not account- or product-specific. The accounts have valid payment methods (paid purchases in other apps work), no Screen Time restrictions, not Ask to Buy. Filed as FB25186860 with a sysdiagnose. Has anyone else seen free purchases failing on 27.0.1 / 26.7.1? Any known workaround besides directing users to the Mac app?