You got sone great answers above, and funnily enough I was just provding an answer in DMs to somebody else that will suit your situation almost perfectly.
Allow me to copy and paste my answer ( I removed their details )
Hmmm, I wouldn’t.
as an example
My FlexM1 lies over a ligament, which is fine and never caused any issues but not ideal if it could have been avoided.
However
If I was to go parallel like you are considering, in my opinion, this would be worse as you are then going over peaks and troughs
eg, like this amazing visual aid
__
W
Whereas, if you were to go in P1, it would be nestled nicely in or on that position
like the following illustration that took me ages to compose
_
V
or
Ɐ
Remember, the Flex reads better with a parallel-to-antenna orientation.
and as most reader antennas are rectangular, you dont really achieve and benefit by orienting you UG4 90⁰ from a P1 position
Stand by for more infographics
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□ vs | □
is no real advantage
My next question and suggestions for you
Which version of the UG4 do you have?
The original “narrow” or the newer improved antenna one?
If the original, I would reach out to Amal or Tac0 and ask about swapping for the new version, the original is…dogshit for reading.
If you have the new and improved, I would recommend parallel to bone in any of the P1= P4 positions.
All great for presenting to readers
Maybe plan ahead with other implants you MIGHT get.
My FlexM1 WAS my most frequently used, it is in P1 R which is great for presenting to readers.
When my Custom payment worked, it was P4 R
I could easily present to payment terminal without issues with my P1
IF I had something in P2 or P3 with that set up, Isolating them from each other may not have been as easy.
Some separation is good
A P2 and P4 would be OK
equally, an P1 and P3
BUT
P1 and P4 in my opinion is ideal.
Of course, Seperation of hands is even better.
P1 in each hand of your most used implants is a good option.
I am right handed, so for me, I use my phone with my right, so a natural position for my ApexFlex is in P1 L as it is easy to just tap my phone to the P1 L
I could present my Apex to a reader easily (but it is not compatible with many locks)
Also for ease, I have my FlexSecure in my forearm, to the left of my watch, so i just align my phone to the watch strap and my phone antenna lays over my FlexSecure for an easy reliable read; but, that position would be awkward to present to a reader and some serious contortionism would be required
I have my UG4 in P4 L
IF the UG4 was avaliable earlier, I would have put in in my P1 R as it is my dominant and most coordinated hand.
I dont have a problem presenting my UG4 to readers where it is, but the added dexterity of my right hand would be a bonus.
You COULD go for reader specific ie.
Your current reader(s) you are planning on using the UG4 with, if they reader is to the left of the door, you might find the P1-P4 Left is the “best” spot.
Let me know if any of that doesn’t make sense.
but long story short
- If you have original UG4 swap it for the new version
- If it was me putting in a new UG4
I would go P1 R
NeXT in P0, but it should be far enough away to not cause any issues.
100%
I have NExT in P0 R and xMagic in P0 L
Because they are on a different plane by simply tucking your thumb down,
they never cause any issues