If your using an iPhone, it works on the 8 and up. I believe it's the same on most the android phones as my Samsung Galaxy 8 has it and not the previous version.
The iPhone 8, 8 Plus and X all support wireless charging, but you can add it to any older model with a Lightning port. Here's how to add wireless charging to the iPhone 7 and older phones. If you buy an iPhone 8, iPhone 8 Plus or iPhone X, you'll find it supports Qi wireless charging out of the box.
https://www.techradar.com/how-to/how-to-wirelessly-charge-your-iphone-7
Android Phones:
Samsung Galaxy S9 and Galaxy S9+
Samsung Galaxy Note 8.
Samsung Galaxy S8 and Galaxy S8+
Samsung Galaxy S7, Galaxy S7 Edge, Galaxy S7 Active.
LG G7 Thinq.
LG V30.
Sony Xperia XZ2.
Nokia 8 Sirocco.