I want to have an application: Prevent harassment and answer my questions to make a phone call.

TechWeb I want to have an application, every day need to find a idea, fun, interesting, we come together to regaling. Recently, a friend claimed that his phone number seems to have been leaked, began to receive at least 3 spam messages a day, and then the garbage phone to the elbow, insurance, one-on-one English, license, recruitment and so on the phone is very disturbing people. Spam messages are a little bit easier to deal with, such as keyword masking, but it seems to be harder for junk phones, especially for iphone users. Although the friend work in Beijing, the suspicion of the field number can not pick up, but do not meet and afraid will miss the field of friends, so recently very tangled. According to a friend's request, he hopes to have an iOS on the app, can be used to authenticate unfamiliar numbers, when not on their mobile phone address book on the phone call friends, the software will be in the form of voice to ask each other two to three questions, the other side to enter the way to answer. Such a problem can not be too difficult, such as my name, I live in which district and other relatives and friends are familiar with, the stranger is not easy to know the problem, only the questions are correct, the phone will be remembered, if the answer is wrong, then the software will automatically hang the machine without activating the ring. It's insurance. Aside from the carrier's support or not, when friends talk about his needs, I think it is a good idea. If possible, the author hopes that this application will be more functional: 1. Support problem settings and voice recording problem features, users can choose 1-3 problems. 2. Scan the Address Book function regularly, and with Renren Address Book, QQ Address Book and other related, allow the SNS website to call friends, and do not enter the problem mode, direct release. 3. Background directory function, intercepted to the phone stored in the directory to facilitate user inquiries. 4. One key through the function, considering this also very likely to hinder the potential work partner, the user can set a key through the key, in the exchange of business cards can first tell each other: My phone number is more special, if there is a problem, you directly press 1 can be directly connected. In fact, this 1 key is equivalent to a shortcut channel. 5. In view of some inconvenience to the typing of relatives and friends, if the answer is not a question can also be a message, the user can be a message to identify relatives or the urgency of things, and then back to dial. In short, according to the friends and the author's idea, we all hope that it can let us remove the long speech of the insurance company, and embarrassed to hang up the phone directly, but this application also has a quite obvious shortcoming, that is for the stranger is a little bit of trouble!