Moto G5’s are not easy to setup voice mail on as the web documentation nad internal instructions are sadly absent or lacking.
Here is how to set up a long push of phone number 1 for a quick dial voice mail.
1. Tap on the dialer app (phone icon)
2. Tap on Menu (3 dots on the upper right
3. Tap on Settings
4. Tap on Calling accounts (Please make sure that the SIM card is inserted)
5. Tap the name of your carrier
6. Tap on Voicemail
7. Fill in the details.
Note: In setting up voicemail, you need to contact your service provider to ensure that the settings are properly provisioned.