How to display the calling place without jailbreaking in ios7?

Apple mobile phone can't display the attribution of incoming calls without jailbreaking, and iOS is a closed system. For security reasons, many contents are restricted. The contents prohibited by the iOS system are as follows:

1.iOS system prohibits system-level software such as incoming calls, SMS display of attribution, SMS receipt, and flash.

2. You cannot delete system programs, modify system files and settings, encrypt programs, send files via Bluetooth, and use third-party input methods. And third-party software can't. Application developers want to put it on the APP Store, and the works on the shelves must be approved by the Apple App Store.

3. Only free programs or software downloaded from the App Store can be installed. Unable to install the cracking program (software without account certificate, such as cracking. ipa，pxl，deb)。

4. Personalized programs such as theme, icon and SMS ringtone cannot be changed.

5. You can't use your mobile phone to download files directly in the browser and manage files on your mobile phone.