That unknown icon is called DIRECT CALL .
Follow Step to disable that ICON
Phone must be ROOTED
Need Rootexplorer.apk
STEP1-open the rootexplorer.apk
STEP2-Find the SYSTEM file then open it
STEP3-Find the CSC file then open it
STEP4- Rename the sales_code.dat to sales_code.dat.bak
After rename REBOOT YOUR PHONE.![]()
Just Follow my STEPS .if you get wrong steps you get BOOTLOOP
THUMBS UPFOR DISABLE THAT UNKNOWN ICON.