Tell me about it! I got an new m7 again (i hate m8 design) but this time i am not going to unlock boot loader not going to s-off and not going to install custom recovery!
This is the thread with the problem i had with my first m7. I haven't quit, still trying to fix it and give it away. Maybe we should make a sticky thread with all those people with problem like this!
+1 for stick it up suggestion! may be some elite dev could come up with a solution if it has some thing to do with software security trigger...