Why won’t my watch text people without iMessage?
My Apple Watch with not text people who have green message bubbles if the iPhone is not around. My watch has cellular.
Apple Watch Series 6, watchOS 7
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https://support.apple.com/en-us/HT205547
1. To receive SMS, MMS, or push notifications from
third-party apps on your cellular Apple Watch, your paired iPhone must
be powered on and connected to Wi-Fi or cellular, but it doesn't need to
be nearby. You also need to be signed in to iMessage on your iPhone.