Here are the steps:
You will take care of moving your number over and deactivating your old phone while you are activating your new phone.
When you receive your new phone, make sure the SIM is installed, the battery is charged and then turn it on. If your old phone has a GSM SIM card, you can reuse that. If it’s CDMA, please see the following article:
When you turn on your new phone:
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 as long as these were synced from your old phone.
Be sure your new 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. Open the Republic app on the new phone. Login to the account that controls your old phone. Select to “Move (your number)”. This will transfer your number to your new phone and deactivate your old phone.
You can find further instruction in how to do this at the following link: