How to boot Nexus 5 into Safe Mode
Tutorial to boot Nexus 5 into Safe Mode. In safe mode all the third party apps are disabled, and only default apps work.
Booting to safe mode is done to isolate the issue, if its due to app.
=================Process===============
1) Press power button for 2 sec
2) Press and hold power off menu on the screen
3) Select OK
4) Phone will reboot into Safe Mode
5) Just restart to come out of safe mode.