Using reader mode in ionic nfc plugin

Ionic Native
1

Hi, has anyone tried using reader mode in nfc plugin? Iam trying to use it in my app, but it doesnt work at all, here is piece of code where i use it.

return new Promise<string>((resolve)=>{
      let alert=this.alertCtrl.create({title:'Přiložte kartu:',enableBackdropDismiss: false,
        buttons: [{
          text: 'Zrušit',
          role:'cancel',
          handler: data => {
            resolve(null);
          }}]
      });
      alert.present();
      this.nfc.readerMode(this.nfc.FLAG_READER.NFC_A,(tag)=>{
        console.log("tag:"+tag);
        resolve(null);
      },
      error=>{
        console.log("errTag"+error);
        resolve(null);
      });
    })

It shows the alert, but nothing happens when i read a tag. It also doesnt log any error. Has anyone some working example?