If the samples you have collected are not synchronized make sure you're connected to an internet connection.
Go to your iPhone settings.
Check your Wifi Connection or if using Mobile Data then mobile data should be switched on.
Under mobile data, scroll down to find the Vine Click app and allow mobile data access to Vine Click app.
Now open Vine Click app and tap on sample in the bottom left.
Tap Not synchronized and your images will get uploaded on Terraview cloud.
✏️ If you are in an area where connectivity is an issue for the moment, do not worry. You can synchronize your sample later as well.