One workaround would be to download an LED Notification app from the google play store. I really don't think any of the available apps are PERFECT, but one that suits my needs pretty well is called "Light Flow". It comes in a free version, a paid version ($2.49), and a "Legacy" version. I installed the current free version and it urged me to instead use the "Legacy" version though I don't recall why it suggested it. Anyway, the free, (or Legacy free) version offers separate LED notification for a number of apps/action. When you have a missed call, when you have an unread text, when you have an unread gmail email. The paid version unlocks several 3rd party apps like outlook email notification and others. You can of course set your preferred LED color and blink speed for each associated notification, such as a red LED for missed call, blue LED for unread text, green for unread email etc. It's actually a very thorough app and can be a little intensive if you go through and try to tweak absolutely every setting for each notification, but if you leave it bare bones, you can be up and running in a minute or two. Give it a try and see if it works for you.