[NFC Hacking] Cavalier Condorelli:
I'm using the one from the repo pk.qwerty12.nfclockscreenoffenabler_v17_9c2341.apk (http://repo.xposed.info/module/pk.qwerty12.nfclockscreenoffenabler)

This is my log cat verbose (debug setting on) filtered with word "NFC" after a tag discovered and lost:

02-13 19:47:10.986 D/NativeNfcTag( 1433): Connect to a tech with a different handle

02-13 19:47:11.066 D/NfcDispatcher( 1433): dispatch tag: message:

02-13 19:47:11.066 D/NfcDispatcher( 1433): message is null!!

02-13 19:47:11.076 I/ActivityManager( 801): START u0 {flg=0x10008000 cmp=com.android.nfc/.NfcRootActivity (has extras)} from pid 1433

02-13 19:47:11.086 D/NativeNfcTag( 1433): Starting background presence check

02-13 19:47:11.146 I/LNfcDispatcher( 1433): matched single TECH

02-13 19:47:11.146 W/slideAside_AM( 801): sendMessage: msg.what:38 obj:TaskRecord{4566f448 #25 A com.android.nfc U 0} arg1:0 arg2:0

02-13 19:47:11.146 V/ActivityManager( 801): Moving to RESUMED: ActivityRecord{45527ed0 u0 com.android.nfc/.NfcRootActivity} (starting new instance)

02-13 19:47:11.156 I/ActivityManager( 801): START u0 {act=android.nfc.action.TECH_DISCOVERED cmp=se.badaccess.locale.nfc/.ui.CheckInActivity (has extras)} from pid 1433

02-13 19:47:11.156 V/ActivityManager( 801): Moving to PAUSING: ActivityRecord{45527ed0 u0 com.android.nfc/.NfcRootActivity}

02-13 19:47:11.166 V/ActivityManager( 801): Finishing activity @5: token=Token{456b8598 ActivityRecord{45527ed0 u0 com.android.nfc/.NfcRootActivity}}, result=0, data=null, reason=app-request

02-13 19:47:11.166 V/ActivityManager( 801): Moving to PAUSED: ActivityRecord{45527ed0 u0 com.android.nfc/.NfcRootActivity} (pause complete)

02-13 19:47:11.166 V/ActivityManager( 801): Moving to FINISHING: ActivityRecord{45527ed0 u0 com.android.nfc/.NfcRootActivity}

02-13 19:47:11.176 I/ActivityManager( 801): Start proc se.badaccess.locale.nfc for activity se.badaccess.locale.nfc/.ui.CheckInActivity: pid=16310 uid=10294 gids={50294, 1028}

02-13 19:47:11.186 D/SlideAside(10927): [MainService.java:213:handleNewActivity()] oooooo New activity startted : com.android.nfc (filtered)

02-13 19:47:11.196 V/ActivityManager( 801): Moving to RESUMED: ActivityRecord{456c4a98 u0 se.badaccess.locale.nfc/.ui.CheckInActivity} (starting new instance)

02-13 19:47:11.276 E/NavigationBar(16310): meta-data ==> set Navi Bg (package:se.badaccess.locale.nfc, portResource ID:0, landResource ID:0, alpha:0)

02-13 19:47:11.276 D/Locale NFC Plugin(16310): android.nfc.action.TECH_DISCOVERED

02-13 19:47:11.276 D/Locale NFC Plugin(16310): Detected Tag: 04A291DA853280

02-13 19:47:11.276 V/ActivityManager( 801): Finishing activity @6: token=Token{456c4be8 ActivityRecord{456c4a98 u0 se.badaccess.locale.nfc/.ui.CheckInActivity}}, result=0, data=null, reason=app-request

02-13 19:47:11.276 V/ActivityManager( 801): Moving to PAUSING: ActivityRecord{456c4a98 u0 se.badaccess.locale.nfc/.ui.CheckInActivity}

02-13 19:47:11.286 V/ActivityManager( 801): Moving to PAUSED: ActivityRecord{456c4a98 u0 se.badaccess.locale.nfc/.ui.CheckInActivity} (pause complete)

02-13 19:47:11.286 V/ActivityManager( 801): Moving to FINISHING: ActivityRecord{456c4a98 u0 se.badaccess.locale.nfc/.ui.CheckInActivity}

02-13 19:47:11.306 V/WindowManager( 801): #6: Token{456c4be8 ActivityRecord{456c4a98 u0 se.badaccess.locale.nfc/.ui.CheckInActivity}}

02-13 19:47:11.306 V/WindowManager( 801): #5: Token{456b8598 ActivityRecord{45527ed0 u0 com.android.nfc/.NfcRootActivity}}

02-13 19:47:11.306 V/WindowManager( 801): #2: Token{45295d30 ActivityRecord{45295be0 u0 pk.qwerty12.nfclockscreenoffenabler/.NFCLockScreenOffEnablerActivity}}

02-13 19:47:11.306 V/WindowManager( 801): #12: Window{43335f60 u0 pk.qwerty12.nfclockscreenoffenabler/pk.qwerty12.nfclockscreenoffenabler.NFCLockScreenOffEnablerActivity}

02-13 19:47:11.306 I/checkAppChanged( 4955): AppChange: se.badaccess.locale.nfc

02-13 19:47:11.326 V/ActivityManager( 801): Moving to DESTROYING: ActivityRecord{45527ed0 u0 com.android.nfc/.NfcRootActivity} (destroy requested)

02-13 19:47:11.336 V/ActivityManager( 801): Moving to DESTROYING: ActivityRecord{456c4a98 u0 se.badaccess.locale.nfc/.ui.CheckInActivity} (destroy requested)

02-13 19:47:11.336 V/ActivityManager( 801): Moving to DESTROYED: ActivityRecord{45527ed0 u0 com.android.nfc/.NfcRootActivity} (removed from history)

02-13 19:47:11.336 V/ActivityManager( 801): Moving to DESTROYED: ActivityRecord{456c4a98 u0 se.badaccess.locale.nfc/.ui.CheckInActivity} (removed from history)

02-13 19:47:14.676 D/NativeNfcTag( 1433): Tag lost, restarting polling loop

02-13 19:47:14.676 D/NativeNfcTag( 1433): Stopping background presence check