To give Monopoly GO access to your contacts, first, open the game on your mobile device. Tap the “Friends” icon located in the lower-right corner of the main screen.
Next, select the “Contacts” option from the “Add Friends” tab. When prompted, enter your mobile number.
Agree to the permission requests to allow Monopoly GO to access your contact list. The game will then scan your contacts.
Monopoly GO will automatically add any friends who already have the game installed. If needed, you can disable this feature later through your device settings.