Rejects unwanted phone calls from hidden callers such as telemarketers or spammers. Available at Google Play

• https://play.google.com/store/apps/details?id=se.embargo.blockade

• Incoming calls with no caller id are silenced and rejected
• Optionally allow calls through on the third attempt
• Requires no more than the minimal permissions to block incoming calls
• Doesn't require permissions for e.g. Internet, SMS, accounts or phone book!

• Clone the mikljohansson/android-core library into the parent folder
• Uses Android Studio for development