Mail icon shows new mail but all mail has been read. Won't update with phone reset.
My mail icon shows new mail (1 currently) but I have no new mail. I have synced phone and turned off several times to no avail.
iPhone 4, iOS 6
If you have reset your phone several times and does not fix , then restore your phone in itunes from your backup. Be sure that you have a recent backup with all items that you wanted saved, synced.
BEFORE, you do the restore, try deleting the mail account and reaading it and see if that fixes the issue, otherwise , then do the restore.