NFC not working

[frankge973]

Recently I'd tried NFC and with an app it was working reading correctly my badge. Now I tried again after some months and I noticed that even if the NFC is ON the app doesn't read nothing.
I tried also to change app.
May depend on Lollipop installed in the meanwhile?
I'm not sure if when I tried last time I'd already Lollipop installed.
What I'm sure is that I changed phone battery.
I tried also to clean the cache in manual mode.

 

[lizardchest]

What I'm sure is that I changed phone battery.

This replacement battery - Samsung Standard Battery for Galaxy Alpha EB-BG850BBUBUS B&H - states that NFC antenna is part of the battery, so if you replaced your battery with a cheap one off of eBay or something, it likely does not have an NFC antenna.