Howdy Techout, thank you for asking us your question about the Samsung Galaxy Watch8 Classic. To take advantage of this awesome promotion through Google Fi, please update your watch, when update is available, in the Galaxy Wearable app. Then once your device has been updated, please open the Galaxy Wearable app, navigate to your watch settings, then to mobile plans, and finally Setup mobile plans. *Google Fi phone plan not required. No changes to your current phone number or plan required. 4G data speed is included with the offer up to 500 MB per month, after which usage, data will slow to 256 kbps. Data will be capped at 1 GB per month. Voice calling over LTE is not supported. Hope that helps! If you have any other questions for us, feel free to reach out to Support! We're always here to help! Thanks for choosing Samsung! - Debra