What to Do Before Selling or Giving Away Your iPhone
Many iPhone owners think about upgrading and selling their devices to jump to new models. Before trading an old iPhone, be sure to prepare the smartphone for sale the right way. You should back it up, clear out all of your data, and deactivate the device from your cell service provider. With backups in place you will be able to upgrade to a new iPhone easily by picking up exactly where you left off, with settings, apps and all.
Many experts recommend making a double backup, one stored locally on a computer, and another stored in iCloud. This procedure guarantees that you will have an accessible backup available when your iPhone arrives.
Request A Carrier Unlock
The reason to unlock your iPhone is that this simple procedure increases the value of your iPhone, because once unlocked it can be used on alternate GSM carriers throughout USA and throughout the world. You will need to contact your carrier directly to inquire about its unlock.
However, unlocking a device is most valuable for resale on the private market, it may be unnecessary if you intend on trading the iPhone in to Apple or another reseller service.
Removal Of The Content From Your iPhone
Deleting documents, contacts, reminders, documents, photo streams, or any other iCloud data while signed in to your iCloud account will lead to the removal of all this content from the iCloud servers and from all of your devices that are signed in to iCloud.
Before I Sell My iPhone
Before you give away or sell your iPhone remove all your personal data and any valuable information in order to protect your privacy: Back up your device. Sign out of iCloud and erase your device, including any credit or debit cards you added for Apple Pay. Thus your iPhone will be completely erased and removed from your account so that the next owner can activate it. To find out more about erasing your iPhone, visit Apple Support Web site: Before I sell my iPhone.