Not receiving all text messages

Hi karenr,

Thanks for contacting Apple Support Communities!

We understand that you don't receive all text messages from one contact, correct?

If it's only happening with text messages, it's likely due to an issue with the provisioning of your account with your carrier. There are, however, steps you can take to troubleshoot messages on your iPhone as outlined here: If you can't send or receive messages on your iPhone or iPad - Apple Support

"If you still need help

• Try to restart your iPhone or iPad.
• Check your network connection. To send a message as iMessage or MMS, you need a cellular data or Wi-Fi connection. To send an SMS message, you need cellular network connection. If you turn on Wi-Fi Calling, you can send SMS messages over Wi-Fi.
• Check with your carrier to see if the type of message you’re trying to send, like MMS or SMS, is supported.
• If you’re trying to send group MMS messages on an iPhone, go to Settings > Messages and turn on MMS Messaging. If you don't see an option to turn on MMS Messaging or Group Messaging on your iPhone, then your carrier might not support this feature.
• Make sure that your device has enough space to receive images and videos.
• Make sure that you entered the correct phone number or email address for the contact.

Learn what to do if you see a Waiting for Activation alert

Contact Apple Support if you still can't send or receive messages

Contact your carrier if you still can't receive SMS messages

Deactivate iMessage if you switched to a non-Apple phone and have issues with messaging"

We hope this helps you.

Cheers!

As these are SMS messages, you should start by contacting your carrier.

Hey there karenr, 

At this point, you'll want to Contact Apple Support for assistance.  

Have a good one!