Wireless charging, at best, can be tricky. The iPhone 12 models introduced MagSafe charging which promises to improve the wireless charging experience immensely, however, standard Qi wireless charging remains problematic for some. 

For now, we must say that standard wireless charging with BookBook for iPhone 12 models does not consistently work to our standards. It works fine for some but not for others so, currently, the most stable and fastest way to charge your iPhone 12 in a BookBook is via the lightning port or with a MagSafe charger.

That said, there are steps you can take that might help if you’re having difficulties charging wirelessly in our BookBook shell - or any case:

1.  Restart your iPhone. This will often take care of any wireless charging issues, including intermittent charging and no charging.

2. Make sure your iPhone has been updated to the latest iOS for fixes and improvements.

3. Make sure you have the iPhone properly aligned with the coils in the charger.  If you're not sure exactly where they are, you may need to slightly move the iPhone around a little to find the 'sweet spot'.  The BookBook for iPhone 12 shell has a metal lining with a large hole that allows for wireless charging, so if the iPhone is not properly aligned on the charger, you may receive a "foreign object" warning, or the iPhone may just fail to charge.

4.  Try turning OFF the Optimized Charging feature in your iPhone settings: Settings / Battery / Battery Health / Optimized Charging / OFF