
The iPhone 5S was officially launched on September 20, 2013.

The implications for iPhone 5S owners now that the device is considered obsolete by Apple are as follows:
No more hardware support: Apple discontinues all hardware service for obsolete products, meaning that Apple Stores and Apple Authorized Service Providers will no longer offer repairs or other hardware services for the iPhone 5S. This includes battery replacements and other fixes.
Limited third-party repairs: Since service providers cannot order parts for obsolete products, third-party repair shops may also struggle to find replacement parts for the iPhone 5S.
No software updates: The iPhone 5S will no longer receive major software updates, including new features, bug fixes, or important security patches5. The last major software update the iPhone 5S received was iOS 12 in 2018.
Potential security risks: Without software updates, the iPhone 5S may become vulnerable to security threats as new exploits are discovered. This could put your data at risk.
Decreased performance: As newer iPhones are released, the iPhone 5S may struggle to keep up with the latest apps and features. This could result in decreased performance and a less enjoyable user experience.
In summary, iPhone 5S owners should consider upgrading to a newer iPhone model to ensure they receive the latest software updates, hardware support, and optimal performance.

The last major software update that the iPhone 5S received was iOS 12, which was released in 2018.