Installing Facebook Messenger on older devices like the iPad 2 or iPhone 4s running iOS 9.3.5 is challenging because Meta has officially dropped support for these 32-bit platforms

Since a full modern Messenger experience is impossible on iOS 9.3.5, here are the actual working solutions for keeping in touch via Facebook on your vintage device.

Using a modified or side-loaded version of Facebook Messenger violates Meta’s Terms of Service. Your account could be temporarily locked or permanently banned for "suspicious activity."