Say I only wanted to allow the people in my phone list to text me - is there an app for either the Droid or iPhone that does this?
Right now, as I understand it, most phones provide a black list, but I prefer a white list. (Actually, a friend asked me, but as I only have a pay-as-you-go phone, I really don’t know much about it.)
Just looking in the Android Market, they mostly seem to be blacklist apps. But there is one called Mr Number Call Block that says it can blacklist phone/SMS or whitelist your contacts and block everyone else. It’s free and has 4.5 stars (out of 5) and looks pretty popular with 50-250k downloads.
I’m not sure the same thing could exist for a non-jailbroken iPhone. I don’t think apple would allow it.
It’s Android, by the way. The Droid is just one of many Android phones.
Anyway, the Blacklist application will do what you want. You can configure both a blacklist and a whitelist. This works for both phone calls and SMS. For calls, you can choose to ignore the call, answer and hang up, or send the caller to voice mail.