就是你从ＩＰＨＯＮＥ打的电话，在接受方显示的是另外一个号码（你指定的号码）。
电话公司怎么可以允许这种事情发生呢？

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SpoofApp: Fake Your Caller ID and Voice on the iPhone
By Anders Batten - Published May 27th 2008 - 17:06 in iPhone Software • SpoofApp • SpoofCard • Tips

Though it would have been better if SpoofApp had been around for April Fools' Day, there's still plenty of uses we can think of to fake (or "spoof") your caller ID. Yes, most of these are for reasons involving practical jokes. Not all, though, there are definitely legitimate uses for spoofing your caller ID -- everything ranging from conducting business from the road to checking in on your kids. So, when one of our readers wrote in about SpoofApp, we thought we'd spread the word.

SpoofApp is a native application for the Apple iPhone that lets callers pretend they are calling from a phone number other than the one they are actually calling from. It's dead simple to use, also. Once you've installed SpoofApp, you simply enter your Spoof Card details, the number you want to call, and the number you want to appear you're calling from -- and hit "Call". The person receiving the call will see the incoming call from whatever number you specified!

Here are a few suggested uses:

1) Think your boyfriend/girlfriend is cheating on you? Call from the suspected mistress' phone number and see how he answers the phone.
2) Want to check in on your kids, but don't want them dodging your calls? Call from a number you know they'll answer.
3) One of your co-workers avoiding your calls? Call from the boss' number.
4) Call a landline from popular known phone numbers and have the receiver see the name displayed with the number.