My messages are either very delayed or don't come in at all

Hi clauds296,

Thank you for posting in the Apple Support Communities. I understand you are having problems receiving group messages from non-iOS users.

I recommend following the steps I've shared below.

"If you’re in a group message and stop receiving messages, check if you left the conversation. Open Messages and tap the group message. If you see a message that says you left the conversation, then either you left the conversation or you were removed from the group message. You can rejoin a group message only if someone in the group adds you.

To start a new group message:

1. Open Messages and tap to start a new message.
2. Enter the phone numbers or email addresses of your contacts.
3. Type your message, then tap to send.

If you have other issues with a group message, you might need to delete the conversation and start a new one. To delete a group message:

1. Open Messages and find the conversation that you want to delete.
2. Swipe left over the conversation.
3. Tap Delete.

When you delete a message, you can't recover it. If you want to save parts of a message, take a screenshot. To save an attachment in a message, touch and hold the attachment, tap More, then tap Save."

You'll find theses steps within the resource linked below.

• If you can't send or receive messages on your iPhone, iPad, or iPod touch

Cheers!