I was able to do some research and according to the manufacturer's specifications, the maximum supported smartphone dimensions are as follows:
- 180×86×10 mm (L×W×H)
If the smartphone is larger including the case, it would have to be clamped without the case.
The iPhone 17 Pro Max without case:
Dimensions: 163.4 mm x 78.0 mm x 8.75 mm (L x W x H)