iOS 13 compatible models:
iPhone 11 Pro Max, iPhone 11 Pro, iPhone 11, iPhone XS Max, iPhone XS, iPhone XR, iPhone X, iPhone 8 Plus, iPhone 8, iPhone 7 Plus, iPhone 7, iPhone 6S, iPhone 6S Plus, iPhone SE, iPod touch (seventh generation).
How to download and install:
Step 1: Charge the iPhone and connect it to the WiFi network
Step 2: Go to settings, and tap on General tab
Step 3: In General, tap on software update
Step 4: Wait for the new update notification to appear and tap on download to begin the update process
Step 5: After downloading the update, the phone sends a notification seeking permission to install it or schedule it