First you have to download the nest app on your phone, once that's completed then you can sign into your google account, then click on add device. if its your first time then you may have to use your phone to scan the bar code on the devices you want to select. its easy from there its self explanatory. i hope this helps
I apologize for my late response and thank you for all of your patience while waiting for a reply. I definitely understand how frustrating your situation must be, and I wanted to make sure that your concern was acknowledged. Do you still need help with this issue? I know that there's been a delay in response since you posted.
Please let me know if you need further assistance.