What is a one-sentence summary of the following article?
It's the app that has an image of a red, yellow, green, and blue triangle. It's at the top of the page. It's the app with a light-blue circle on a white background. It's the green under the app's title at the top. This will begin downloading the app and install it on your phone. This option will appear where the "Install" button was once the app is finished installing.  This will launch the Slydial app. You will need to type your phone number in the first line, and then confirm it in the second line. This indicates that you agree to the Slydial terms and conditions. It's the blue button above the checkbox. Fill out the required personal information to sign up for a free Slydial account. It's the blue button below the three bars. The first time you use the app, you will be asked if you want to allow Slydial to access your contacts or your phone.  Tap "Allow".  When you use Slydial, you'll hear an advertisement before you are connected to the voicemail of the number or contact you're calling. Select one of the following:  Tap Slydial a contact to chose someone from your list of contacts.  Tap the contacts name and then tap the mobile number you want to call. Tap Slydial a number to dial a phone number.  Then tap Dial.  It's the blue button at the bottom. Press the button that has an image of a red phone to hang up and end the call.  The contact will receive your voicemail, but won't hear their phone ring.
Open the Google Play Store . Tap the search bar and type Slydial into search. Tap the Slydial app in the search results. Tap Install. Tap Open. Type your mobile number in both lines. Tap the checkbox  at the bottom. Tap Continue. Type your first and last name, email address, and password. Tap Sign Up. Tap Slydial a contact, or Slydial a number. Once you've left your message, disconnect the call.