dang... shinobi's settings dun work for me...
time to test with someone else's MMS phone...

@nokia2003
I never MMS, but I need to demonstrate to customers... guess this is one feature I will skip ?

@Neo18
http://www.apple.com/iphone/softwareupdate/

@sHin0bi
multiple times
the 'sending' bar goes all the way to ~90% ... then nothing... same result as in the beta 5 ...

For Celcom users to enable your tethering. Use at your own risk, I have tried it, if you do not like it or does not work you can remove it

Install << THIS >>. Make sure you open this link on your iphone. It will ask you to install this Profile, there is a warning about the authenticity of this program, just hit Install Now, once it is done, hit the Done button. Go to settings->general->network->cellular data network and remove the celcom3g on both Cellular Data and Visual Voicemail APN settings. They should be left blank. Hit the network to go back. Now you can turn on the Internet Tethering option.

If you want to remove this profile, just hit General and scroll down to the Profile, click on Enable Tethering on Celcom 3g and you can see the a red remove button icon.