Why my smart phone didn’t response with BenQ NFC tag?

"The reasons are quite a lot. We list all possible reason and self-checking methods.
1) The NFC function of your mobile phone was broken. Please tap your mobile phone with other NFC cards or tags
2) The hot zone of you mobile phone sensitivity is too small. The antenna of you NFC on mobile phone is not wide ranged.
Please tap and can all the area of you mobile phone and find the tapping hot zone.
3) The NFC tag was broken. The tag broken reason might be twisted tag or the tag was damaged by water."