How to know if someone is spying on my iPhone?

ashat20 wrote:

My iphone 7 plus is been monitored by someone. I am 22yrs old and when I call to particular mobile number, normal calls and whatsapp they know..how to stop this without resetting

Please answer the following questions:

1. Has your phone been jailbroken?
2. Has someone had unsupervised access to your unlocked phone for more than a few minutes?
3. Are you a high-profile journalist, activist, or politician?

If the answer to those questions is "No", your phone has not been hacked.

It is still possible that your Apple ID has been compromised. Start here:

If you think your Apple ID has been compromised - Apple Support

That's improbable. If you have not jailbroken your device, nor given it to someone with your passcode for extended time, you have not been hacked.

Can you elaborate?