BT Handset can fixed no incoming call forever on sleep mode!
GOOD NEWS FOR ALL ** AND ME TOO **
3 Day ago i found old BT handset JABRA250 on my home
i think use them on my car .
FIRST ON MY THING when calling coming and not thing on iPhone but BT can hear coming call... Oh... ... i don't care because i want to save my BATTERY
BUT iPHONE IS CALLING BACK
I hear calling tone on my phone.. wow it perfect.
Add BT Handset can solved DEEP SLEEP on my iPhone
and then i try turn off BT Handset but iPhone still show BT icon on top screen now i call to iPhone again.. Wait Wait Wait....
Oh god CALLING STILL HEAR....
today i don't do anything because it perfect.
i want to anther person test for this and feedback