Yes, with Swisscom Buyback, you can sell your old iPhone in return for credit that you can use against the purchase of your new phone. 

All current iPhone models, including the iPhone 16 and newer support 5G. 

The main differences are in the frame material (aluminium versus titanium), display size (6.1 inches versus 6.3 inches), refresh rate (60 Hz versus 120 Hz) and the camera
(two camera lenses on the iPhone 16 compared to three, including telephoto) on the Pro version.  

The iPhone 16 Pro has the better camera with three lenses, including an additional telephoto lens for five times optical magnification. iPhone 16 Pro also has a new
Camera Control button that you can use to quickly launch the camera or adjust the zoom, exposure and depth of field. An update in the autumn will equip the button with a two-stage shutter.

Yes, the iPhone 16 Pro offers a longer battery life than the iPhone 16. 

The iPhone 16 is available in bright colours such as Ultramarine, Pink and Teal, while the iPhone 16 Pro comes in four stunning colours: Black Titanium, White Titanium, Natural Titanium and the new Desert Titanium. 

iPhone 16 brings some improvements compared to the iPhone 15. It features the all-new A18 chip, an improved camera with macro mode and a vertical arrangement of lenses. There are also two new buttons: an Action button and the Camera Control button. iPhone 16 supports exclusive AI features and has a longer battery life of up to
22 hours of video playback. The design is similar, but there are new colours and the back of the phone is slightly different.