Unable to receive some messages or get messages late

[Elliot39]

I am able to send messages to people and the person receiving my messages gets them on time however when they send a message to me I don't get it or I get it a few hours late. Why is this?

[bristolian]

Is there any pattern to the delayed receipt? Messages from a particular network, for example?

If you send a text to yourself, do you receive it within 30 seconds or so?