If you are unable to take a phone call, you can ignore the phone call and reply with a text to let the caller know you are unable to talk at that time.
1.
From the Incoming Call screen, tap Ignore with message.
2.
Tap Create new message.
To respond quickly, you can also select one of the available preprogrammed responses.
3.
Compose your message.
4.
When you're finished, tap Send.
5.
You've completed the steps!
1.
From the Incoming Call screen, tap Ignore with message.