Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to use viber [title] Install viber on your mobile device. [step] Once viber has been downloaded, tapping on the app will begin the setup process. Input your device's telephone number and grant access to your contact list, then you'll be sent a text message with an access code.

Ending1: [title] Input the access code you receive via text message. [step] You're all set up! Now you'll see a number of options at the bottom of the app including messages, recents, contacts and keypad. Ending2: The access code will need to be at least 4 digits long or higher in order to be used. This access code will change if you have a phone with a sim card. Ending3: [substeps] You should hear a series of beeps and chimes when you do this. Your device is successfully enabled! [title] Open the app. Ending4: [substeps] If you have viber listed on your wireless network, you can skip this part of the setup process. There's no need to enable viber if you only need to learn and follow the instructions given by the developer.

Answer format: ending1/ending2/ending3/ending4