How to Insert Smileys In Your SMF Wap2 mobilefriendly forum.
On smf wap2 template smileys are actually disabled, but the good thing is you can get this enabled. First i want to believe you have install your smf wap2 mod, if you have not then you should do that before doing the bellow step.
To do this enable this feature, follow the below step:
1. Login to your cPanel > File Manager
2. Locate the file Subs.php in Sources directory, that is, public_html/Sources/Subs.php.
3. Edit with your desired text editor and search for this code
Find this code
4. Replace with this
That's all, you should be able to have your smileys now showing on your mobile friendly wap2 smf forum
Source: How to Insert Smileys In Your SMF Wap2 mobile friendly forum