Hi, I've installed 3CX Phone in my iPhone 4 (firmware 4.2), and it's all ok but when I received a call in my iphone, it's no Caller ID. Instead, it appears my extension number. I mean, I've registrated with extension 105, and when I received a call from another internal extension or from an external number, it always appear as if the caller number is 105. It's a bug or a bad configuration issue? Thanks. Best regards.