CallHero utilizes your carrier's Conditional Call Forwarding feature to handle your declined calls.
When you activate conditional call forwarding, your phone will ring normally allowing you to answer your calls. If you decline/reject the call, your carrier will forward the call to CallHero's number.
Setting up conditional call forwarding can get tricky. If the Callhero setup process failed, please try our help guide to activate manually:
What wireless carrier are you using?