Try this version. It's the only one that works for me
https://www.dropbox.com/s/ty25dclqt9ui0mp/tagmo2.1.apk?dl=0
https://www.dropbox.com/s/ty25dclqt9ui0mp/tagmo2.1.apk?dl=0

On my phone, LG G4, antennae is on the battery door. Hope you get one with the nfc antenna.Hmm that doesn't do anything either. I'm thinking it's either due to missing battery door or the battery I'm using. The battery I'm using is from a Samsung Galaxy Core Prime which has NFC as well..But the battery isn't a perfect fit. I have a proper battery coming in the mail along with a battery cover. So I guess I'll put this on hold till that comes in to rule out those being the cause of the issue here.

On my phone, LG G4, antennae is on the battery door. Hope you get one with the nfc antenna.
I use a Samsung S4 Mini. Got it off eBay. Came with a 3 pin battery, NFC did not work. Replaced with a 4-pin battery that has the NFC logo on it, worked fine. So yes, there does matter a difference in the battery.Is there any exposed contact that connects to it? I don't see any connectors so I assume it's in the battery...
EDIT:
Ok after some googling Samsung exclusively puts them in their batteries and thus the batteries have 4 pins instead of 3. Perhaps the phone I took this battery from didn't have an antenna. Non NFC batteries probably still have the fourth pin so I'd have to go by the model number to see if one has it or not.

and where i can get the decryption key.bin ?you needs the decryption key .bin

there's 2. Re-read the OP, three or four times if need be.i downloaded a key. bin but still dont work ...
Download any free NFC app from the Play Store, such as NFC TagInfo and see if it will just scan the blank tag or not.So even after having the proper battery I'm still not seeing anything happen when I go to write a NFC tag.![]()


Make sure you also have nfc turned on in your android quick settings (pull down from the top)
You never know. Just crossing things off the list.Obviously I had it on. The NFC icon was visible on the top bar.



