You do not configure a Nest thermostat to connect to a phone like pairing a bluetooth speaker. Instead you essentially configure the thermostat once for wi-fi to connect to your account. Once the account is established you can login to that account from any device and manage the Nest devices that have been configured. OR if you want others to manage, say a spouse, children or roomate, you can invite them to do so - they do not need to re-setup up the thermostat.
Thanks for reaching out and we're sorry for the delay.
I'd like to jump in here and check if you've seen sporfrog's response. Let us know how it goes and we'll be glad to assist you if you have questions.
Thanks for your help, sporfrog.
I haven't heard from you in a while so I'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community.