Review on Versatile Metal Phone Tripod Mount with 3 Cold Shoes, Arca Port, and 360° Rotation: Ideal Smartphone Adapter for iPhone, Samsung & More - Perfect for Desktop Tripod, Video Streaming, Vlogging Rig by Sara Houck

Great device, I use it with an iPhone 12 Pro Max with Otterbox Defender case and it holds it with no problems and it still has room for a larger phone, pictures are attached to show how much extra space . I use it with my Manfrotto ball head tripod and everything is very solid. Definitely recommend. The landscape/portrait rotation lock works well and I've used it with two landscape lumecubes so far and it's been amazing.