How to switch to safe mode on an Android Phone

crwdns2936025:02crwdne2936025:0 —

crwdns2935483:0crwdne2935483:0

Press and hold the power button for about 15 to 20 seconds until the phone reboots.

Then hold the volume-down-button while the phone is still starting up.

crwdns2944171:0crwdnd2944171:0crwdnd2944171:0crwdnd2944171:0crwdne2944171:0

crwdns2935431:0crwdne2935431:0