Within a minute of insertion while still seated in the piercing room, I whipped out my Galaxy S8+ in its clear plastic case and read the HF transponder in my NeXT implant through the surgical tape holding the gauze on my fresh puncture. This slightly freaked out my piercer because my nasty phone unexpectedly broke his sterile field (we were through the procedure), but the techie in him was intrigued when the tag read and the data displayed on the phone.