Me and my friend both have https://www.amazon.com/MPQ2WD-XTSP-MagicMount-Magnetic-Qi-Certified-Micro-USB/dp/B07CXV4RXQ/ref=sr_1_14?dchild=1&keywords=scosche+mount&qid=1613005255&sr=8-14 this one, worked well for my s9+ and my friend has the metal plates now buried into his case and says it is working well on his s21ultra.