I just gave away my iPhone without deleting it first, what to do?
I accidentally pushed reset settings instead of delete iphone. Now he can use everything personal if he wants to. How can i delete that phone from a 3rd party phone/computer?
See here:Link-> Remove a device from Find My iPhone on iCloud.com - Apple Support
f you're using iCloud and Find My [device] on the device, sign in to iCloud.com/find or the Find My app on another device, select the device, and click Erase. After the device has been erased, click Remove from Account.