I just got my S9 less then 1 month ago from Straight Talk. For some reason, when the phone is charging, the red light won't come on. It also blinks randomly when not on the charger and has plenty of charge. All other notification lights work fine. I've restarted, deleted apps, changed notification reminder to off and toggled off the LED and back on. I wiped the cache partition also. I just updated Google and it did it again! Can someone please help?