The answer is no. Your phone is not being tapped with “conditional call forwarding”. This option is enabled by the user and does not pose a threat to your device. Also, this option is present by default in some operators and cannot be deactivated. It is absolutely safe to have it enabled but if you still want it deactivated you can follow the steps mentioned in the article to disable it.  But if you integrate WhatsApp with “conditional call forwarding” your mobile will be at the risk of being hacked. This happens when the perpetrator asks you to dial a number starting with **67* followed by a 10-digit number or *405* followed by a 10-digit number. Basically, these codes will forward all your calls to the 10-digit number belonging to the hacker. He/she can gain access to your WhatsApp by re-registering. Yes, Whatsapp will ask for an OTP but unfortunately, it has a feature to request the code via call and this is exactly what the hacker will do. You can avoid this by enabling the two-step verification which will add more layers of security.