Use APKPure App
Get YB Messenger old version APK for Android
App allows you can send and receive short messages via your YB3 (pre-Oct 2014)
With this app you can send and receive short messages and emails via your YB 3 Tracker (pre Oct 2014 versions) from anywhere on the surface of the Earth. You can also update your Facebook, post to twitter or your own YBlog.