Done and moved and here we are, thanks.
Quite possibly the stupidest thing that’ll be posted here…
Similarly to the iPhones, reader is near the top of the back on the Lumia 1020. Vertically approaching the implant to the reader works.
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Not at all, that will help others out. thanks for the share, and I have updated the list and linked to your post
Just wanted to confirm that as expected, the OG Pixel also works quite well (my implants have not yet healed, but I’m getting consistent reads / xLED lighting up / xFD).
This is not a surprise, since the Pixel XL works, but more the merrier right!
Positioning same as
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Indeed, Updated and linked, Thanks
Samsung Galaxy A71 works pretty good. I have a thin silicone case and I get good reads with it on, but better with it off of course. Antenna is located next to the camera block, but I find the best reads come from the highlighted blue zones, better if the x-series implant antenna is perpendicular to the antenna.
Tested with xFD, xLED, xNT, NExT, Spark2 + DT Diagnostic card
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Added yours with 
9 A71 post
Good info
Whoops, I looked to see if it was listed already but looked at the wrong place. Sorry!
Nah, your one had a little more detail, It’s all good.
Better too much info, than not enough
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Excellent, Thanks, I have added and linked to your post
Just got the new Galaxy S21; works well with the SIID and the NEXT. The coil is located right in the horizontal and vertical center of the phone so the best reads come at the edge of the phone in the vertical center.
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I concur. My new S21+ reads my NExT cleanly in the center even while in an Otter Box Defender Pro series case.
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iPhone 12 Mini/Pro/Pro Max have been verified and can be added to the list.
edit: to add the mini, just tested & verified.
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Done, Thanks 
Cat S42: easy read with my IAR M1k. I suppose similar performances with a DT glassie. No trouble at all with a flexM1 of course. Only slight downside: the antenna is in the middle of the back of the phone, not at the edge of the case. So it’s not as easy to find the sweet spot. But the case’s shock-absorbing ridges at the back help you to locate it by touch.
Updated and linked to your post
Thanks
Ulefone Armor 3W: easy read with my IAR M1k and no trouble with my flexM1, as you would expect. The sweet spot is somewhat difficult to hit though, the back of the phone being essentially featureless. Also, surprisingly, it is quite a different sweet spot for a glassie and for a flexie.
Updated and linked Thank you.