It is a trap. You will either lose your account, infect your phone with malware, or both. The nostalgia for the "green icon days" is strong, but no video call is worth giving a hacker access to your camera and contacts.
Today, thousands of users are searching for the same thing: imo old version premium apk
Clear the data on your current official IMO app. It resets the cache and often fixes lag without the security nightmare. Have you tried a modded APK before? Share your experience (good or bad) in the comments below to warn other users. It is a trap