If you look into
this, you will know that neither iPhone nor iPad supports the Message Access Profile (MAP).
The iPad also does not support Hands Free Profile or the Address Book Profile (as yet)!
Perhaps we will have better luck with iOS5?? Apple please make this happen
Blackberry (RIM) have gone a step ahead of Apple and they have the MAP in their phones. AFAIK, some Nokia and Sony phones do have this profile too!! I don't seem to be seeing it in the Windows 7 phones though