Apple’s latest iPhone released is their largest ever, with 4 million units pre-ordered within the first 24-hours. Backups are a must before you go to trade-in your old iPhone for a new one. If you have an iPhone, Apple recommends the following: Backup your device. If you’re using iOS 7 or later, and have Find My iPhone turned on, your Apple ID and password will be required. After you provide your password, the device will be erased and removed from your account so the next owner can activate it.”]
Source: https://www.csoonline.com/article/2684096/quick-tips-before-you-switch-to-a-new-iphone.html