how do i reject incoming call on my iPhone SE

Hello there Daz88,

Thank you for using Apple Support Communities!

We understand that you are inquiring about rejecting incoming calls from specific people. We are more than happy to help you out with this.

For more information on blocking numbers and spam calls, check out these articles:

Block phone numbers, contacts, and emails on your iPhone, iPad, or iPod touch

Detect and block spam phone calls

To decline calls, review the section, "Decline a call and send it directly to voicemail" in the following article: Manage incoming calls on iPhone

We hope this helps! Have a great day!