For Everybody Who's Having Issues With The LED FLASHING ALERT On The iPhone 4S, I May Have Promising News For You.
I Just Spent The Last Hour Or So With An Apple Support Tech, Who Then Forwarded Me To A Senior Support Person. I E-Mailed Her This Link So That She Could Research This Issue.
Long Story Short, We Eventually Went Into The Settings - General - Reset - & Reset All Settings. 3 Minutes Later Tops, I Went Back Into The Settings - General - Accessibility, & Then Turned The LED FLASH FOR ALERTS Option ON. Tested It, & IT WORKED!!!!!!!!
Tested It A Couple of More Times & It Still Works!
I WANT TO THANK THE INCREDIBLY PATIENT APPLE SUPPORT STAFF, FOR AN AWESOME JOB!!!!
The Senior Support Tech Also Requested That I Relay To All Apple Product User That Their Techs Do NOT Monitor Their Support Discussions. Sooooo, If Your Having Issues With Your Apple Product, Call 1-800-MYAPPLE, & They Will Do Their Best To Assist You With Your Problem. AND I Am Not Affiliated With Apple In Any Way. I'm In Law Enforcement!