Please be sure you are purchasing the compatible model number. For the Moto G5S Plus, that’s (XT1687). You can see the complete list of compatible phones at the following link:
You will also need at BYOP SIM Card Kit which you can find at the following link:
Republic Wireless SIM Card Kit | Republic Wireless
You will take care of moving your number over and deactivating your old phone while you are activating your phone.
When you receive your new phone, make sure the SIM is installed, the battery is charged and then turn it on.
First: Select your language.
Second: Connect the phone to WiFi. all activation takes place over WiFi.
Third: Add the same Google account that you have on your old phone. This will move your contacts, Gmail and access to Google Photos and Drive.
Be sure your phone has the Republic app installed and up to date. This is also an opportunity for your phone to start updating apps
Fourth is Republic activation. Login to the account that controls your phone. Select to “Move (your number)”. This will transfer your number to your new phone and deactivate your old phone.