If you got it from somebody / somewhere else, it may just have a EM4x05 in it, so locked in that mode. But this is not too likely, as it is easier for manufacturers to “just throw in a T5577” and program it to whatever they like.
You might need to Wipe it back to T5577, to see if it has a T5577 chip, then you can write to it like @zwak said above.
The commands will be
lf t5
Then follow the options ( I dont know off the top of my head )
Of course this doesn’t provide you with an easy way of making the card act like an HID card if it isn’t really a T5577.
The best way to start would be to see if
lf t55xx wipe
works. If it does then you really have a T5577 and you can just do a
lf hid clone -w H10301 --fc XXX --cn YYYYY
Otherwise you are looking at
lf em 4x05 unlock
Followed by a series of
lf em 4x05 write <data> <block>
And I don’t know enough about the configuration of an em4105 to know exactly what you would want to write.
Given that both cards look like they use the same chipset, you should be able to dump the hid card AS AN EM4105, and then write that block by block using the above command.
lf em 4x05 dump
...Change cards and...
lf em 4x05 unlock
lf em 4x05 write <data> <block>
Go read the second half. Clone requires a t55xx but you should be able to unlock the ring using the unlock command, get a dump from the card and write it block by block to the ring.
Edited to add:
If you’re lucky (and you probably are) most blocks are blank so you should only have to write a few blocks to emulate your card to your ring.
Do you know approximately how long it takes to unlock a card? (It’s been running for approx. 20min. now for me on an em 4305) showing this over, and over.
Tried to find info on that in other threads, but couldn’t, so I thought I’d ask here, since it’s about that chip. Also figured it best to find out if interrupting that would “brick” the chip.