: With only 1GB of RAM and an aging A8 chip, the device struggles with modern web browsing and multitasking, often leading to significant lag and app crashes. Critical Pre-Purchase Checklist

If you still choose to buy one for a specific project or as a budget secondary device, use this checklist to avoid common pitfalls: If you want to buy a preowned iPhone - Apple Support

: The iPhone 6 is permanently stuck on iOS 12.5.8 . Most modern apps, including banking, social media, and even YouTube, now require at least iOS 16 or newer to function.