"Let's Encrypt, a nonprofit organization that is the largest issuer of digital certificates — which encrypts and protects the connection between devices and websites on the internet — will be forced to expire one of its most popular digital certificates, the IdentTrust DST Root CA X3, on Sept. 30.
This means several phones, computers, video game consoles, smart gadgets, and "Internet of Things" devices bought before 2017 that use the Let’s Encrypt digital certificate in question, and haven't updated their software since then, could face significant issues connecting to the internet.
The problem will primarily affect popular devices, such as iPhones running iOS 9 and below, Android phones running below the 2.3.6 software, Windows computers running software prior to XP SP3, Sony's PS3, and PS4 game consoles, and the Nintendo 3DS." Source: https://news.yahoo.com/millions-old-phones-laptops-smart-210600565.html
This means several phones, computers, video game consoles, smart gadgets, and "Internet of Things" devices bought before 2017 that use the Let’s Encrypt digital certificate in question, and haven't updated their software since then, could face significant issues connecting to the internet.
The problem will primarily affect popular devices, such as iPhones running iOS 9 and below, Android phones running below the 2.3.6 software, Windows computers running software prior to XP SP3, Sony's PS3, and PS4 game consoles, and the Nintendo 3DS." Source: https://news.yahoo.com/millions-old-phones-laptops-smart-210600565.html