By default, the Clover Flex-3 will be in Merchant mode, which allows you to access the admin panel and the Android device settings.
The
Admin Panel has some options for the Cardpointe app.

The HSN (hardware serial number) is listed here for ease of use. This uniquely identifies the terminal and is needed for the setup in Liberty.
Contact Support brings up the Cardpoint Support center website.
Lock Customer Mode makes the device launch into Customer Mode automatically when the app is launched. Once the device is fully configured you won’t need to use Merchant Mode often, so locking it into Customer Mode can be helpful.
Cardpointe Properties shows information about the hardware and software.
Internet Connection shows information about the internet connection. You can click
Advanced Configuration to reach the WiFi settings if you need to connect to a network.

Application Properties gives you the app version.
Settings can be reached from the home screen or the
Advanced Configuration option in
Internet Connection. Tap on
Network & Internet to connect to a WiFi network.

Once all of the settings are set, put the device in
Customer Mode.
Customer Mode allows sales to go through to the terminal once they are rung up in the POS.

To exit
Customer Mode, touch all 4 corners of the screen at once.

The Clover terminal accepts the following types of payment:
Credit Cards
Debit Cards
Contactless Cards
EMV
NFC
Once a sale is rung up in Liberty, the Clover will automatically light up with the total cost and prompt the customer to insert, tap, or swipe. They can insert or swipe at the bottom. Tap works anywhere on the screen but may work best on the top half of the terminal.
After the transaction is approved, Liberty will prompt for a receipt if you have that option selected, otherwise it will just ask you to click any key to complete the transaction.