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: Automatically hangs up and restarts the call if the line is busy.

If you are looking for a simple app for your Android or iPhone, these are the standard features included in tools like Auto Redial on Google Play or Redialer on App Store : programma avtodozvon skachat

For business marketing or automated notifications, professional services like Zvonok offer more complex features: What Is Auto Dialer Software? - Blog : Automatically hangs up and restarts the call