HI there,
OK , So you are checking off the right boxes…
That low WILL require Tuning Caps, His unit was 2uH so not apples to apples yet!.
On my Sammy 8+ it has to be naked, in a case it won’t read. On a 9+ it works straight away… Same with a Real TAG!.
Your close , You’ll get it.
Keep going
GL 
PJ 