The Signal messaging app uses end-to-end encryption so that your texts, calls, videos, files, and location remain private. Here's how to use it.

You can make Signal as your Default SMS Messaging App on Android phone. You can switch between standard text and secure message.

Downloading and setting up Signal The first step, of course, is to download the Signal app on your iPhone or Android device via the Apple App Store or Google Play.

What Is Signal? Signal is a messaging app, just like WhatsApp or iMessage or Facebook Messenger, but one that's geared toward privacy and security rather than cute emoji stickers.

Changing the color appearance of Signal messenger app in your Android phone Although Signal is a security focused app it also has features that allow you to customize its appearance.