Yktvdd Said:
"If I have an old iPhone and I turn it on will I get the notification on my new iPhone that my old on is turned on if the Apple ID and everything is turned on? I have an old iPhone that I left at my house and my parents know my password will I get a notification if they turn it on? I have my Apple ID and everything connected to it still"
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Verify a Device's Usage:
No. It will not tell you right-of-the-bat with a message or sorts in regards to the new iPhone.
So, is Find My enabled on your iPhone? If so, go here and see if it is seen: Find your Lost Apple device or AirTag with Find My - Apple Support. As it reads: "If you don't have an Apple device to use Find My, find your devices at iCloud.com/find." If they do not turn it on, then the location will not show until it has been powered back on and connected to the Internet. The location is all based on an IP Address.