Normally, it’s tge other way around, people can read the XSIID but not see the LED, which can often take from 4-6 weeks.
It takes more power / better coupling to read the chip than to light the LED.
So thats what I think is happening here.
So you have: iPhone, PM3
Do you have a booster board?
or
RSP for your iPhone?
is this how you are reading on your iPhone?
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