If the drop-in feature is appealing to you, then you'll be pleasantly surprised to know that it's pretty easy to set up. Open the Alexa app and tap on the three horizontal lines in the upper right-hand corner. From here, you can turn on the Drop-In feature. You can set the feature to drop in from inside your home, or you can set it up to drop in from anywhere. If you choose the latter, it will only allow specific contacts to drop in on your Alexa device. Once turned on, head over to the Communication icon at the bottom of the Alexa app and toggle 'Allow Drop In' to the on position. Now, you can use the Alexa app on your phone to call your Alexa device.