From my study of 187 mobile professionals over the summer of 2006, here is how the management, administrative and IT professionals considered the usefulness of call screening service.
Rate the Usefulness of Call Screening Service:
"Call Screening. Imagine a service where all calls to your office extension were made visible to your mobile phone by presenting on its screen the choices of accepting the call from <number and name>, transferring it to <predetermined coworker or subordinate>, or sending it to your company voicemail."