Open the Phone app
Tap Recents
Check for missed calls from blocked numbers
Open the Messages app
Search for the contact or number
Check the conversation list for any visible messages
Open Settings
Tap Messages
Tap Blocked Contacts
Review the blocked numbers and contacts list
Open Settings
Tap Phone
Tap Blocked Contacts
Review blocked callers
Open Settings
Tap FaceTime
Tap Blocked Contacts
Review blocked FaceTime contacts
Check voicemail for blocked callers
Use a third-party spam filter app if installed
Unblock the contact to receive future messages
Ask the sender to resend the message after unblocking