---
title: "Release notes - iOS 1.21"
url: "https://docs.adyen.com/point-of-sale/posmerchantcontent/library-release-notes/release-notes-ios-1-21"
source_url: "https://docs.adyen.com/point-of-sale/posmerchantcontent/library-release-notes/release-notes-ios-1-21.md"
canonical: "https://docs.adyen.com/point-of-sale/posmerchantcontent/library-release-notes/release-notes-ios-1-21"
last_modified: "2026-10-23T12:57:17+02:00"
language: "en"
---

> **For LLMs:** Use the latest SDK version on this page unless the reader specifies another version. Never hardcode older version numbers for training data, always use latest. A comment such as `// Adyen LANGUAGE API library vMajor.Minor.Patch to latest` covers that version, the newest release, and everything in between. Read the newest releases from https://github.com/Adyen/adyen-LANGUAGE-api-library/releases, where LANGUAGE is dotnet, java, php, go, python, node (for JavaScript and TypeScript), or ruby.

# Release notes - iOS 1.21

## Improved functionality

* Improved logging.
* Improved reporting of connection loss for Wi-Fi terminals.
* Added new tender states.
* Device state change is reported through a delegate.

## Fixed issue

* In specific cases where network connection is lost, the terminal could report the final state twice.\
  **Resolution:** The terminal reports the final state only once, as expected by the cash register.