Nein, Backup solltest Du sicherheitshalber machen und Find My iPhone ausschalten - anbei Infomail der Terminbestätigung

Here are the details of your upcoming Genius Bar appointment.
Be sure to check in with a Specialist when you arrive.

Genius Bar for Your iPhone
Case ID: xxxxxxxxxx

Before You Come In

Back up your data.
Protecting the valuable information on your iPhone from loss is incredibly important. For peace of mind, back up your data on your computer or in iCloud before you come to the store.*
Learn how to back up your iPhone

For us to service your iOS device, Find My iPhone will need to be temporarily turned off. In order to turn off Find My iPhone, you must have your Apple ID and password.

Update your software.
Many issues can be resolved by updating the software on your iPhone. If you’re using iOS 5 or later, you can update over Wi-Fi or by connecting to iTunes on your Mac or PC.
Learn how to update your iPhone software