What is Smiley icon in WiMax Mac Address

Many of users don't know what is the smiley in mac addresses specially newbies. So simply this post want to help those newbies encountering this simple problem. Basically when you posting a number of series following with letters (ABC) it will automatically posted as smiley icon so some will work just copy and paste it to notepad but some are not. In this post will reveal the truth behind the (smiley) on the MAC address.

Sample Mac Address with Smiley:

F4C:F3:30:21:80

C8:08:F4:0:21:80

34:CD:BE:5:A7:E3

Answer:

Letter "D"