To setup voicemail on Moto G Power, follow the steps below
Step 1: Go to the phone App.
Step 2: Tap to select the keyboard.
Step 3: Press and hold 1.
Step 4: Now you can select OK to set up your voicemail.
Step 5: swipe left and select the menu button.
Step 6: Select settings.
Step 7: Now you can select voicemail.
Step 8: Select Advanced settings and tap Setup.
Step 9: Select the voicemail number and enter the number and select Ok.
That's all. You have set up voicemail on your Moto G Power.