Caller specific action can be defined, e.g. only friends can get trough, but other callers will receive an SMS stating that the phone user is busy.

• 来段机器翻译:来电者特效药行动能被定义, 举例来说唯一的朋友能拿木钵，但是其他的来电者将会接受 SMS 说电话使用者很忙碌。