迷惑電話ブロック is a utility application developed by SoftBank Corp. It provides users with a range of features to protect themselves from dangerous calls and messages. The app can detect and warn users about scams, such as fraudulent money transfers and malicious solicitations, through warning notifications. It also has the ability to detect and categorize dangerous emails, such as fake billing scams, into a separate folder called the "Spam Message Folder."

One of the key features of 迷惑電話ブロック is its ability to automatically display the name of the caller or sender, even if they are not saved in the user's contacts. This is done by utilizing information from the Hello Page database. This feature provides users with peace of mind when receiving calls or messages from public facilities or businesses.

The app offers three main functionalities:

1. Warning notifications for nuisance calls: Users are alerted about dangerous calls, such as scams and aggressive solicitations.

2. Warning notifications and automatic categorization of nuisance emails: Dangerous emails, like fake billing scams, are automatically sorted into the "Spam Message Folder" in the "+Message" app. Users of other email apps will receive notifications or warning screens for spam messages received via SMS.

3. Blocking specific numbers: Users can register unwanted or prank call numbers to reject incoming calls.

Please note that the 迷惑電話ブロック app is only compatible with SoftBank smartphones running Android 4.1 and above.