If you want to take photos with your iPhone and upload them to Instagram, you can do so easily using Dropbox. First, open the Dropbox app on your iPhone. Next, find the photos you want to upload and tap on them. (You can also drag and drop them into the app.) Next, tap on the “Share” button in the bottom left corner of the app and select “Instagram.” You’ll be prompted to login with your Instagram account information. After you’ve logged in, your photos will be uploaded to Instagram and ready to share! ..