SWMBO works in a fairly rural area, right outside our metropolitan area. More farmland than buildings.
As a family, we share lots of texts and images. When she comes home from work we often talk about the pictures or videos that were shared and she often says "I didn't get any pictures/videos." She's not very tech savvy, so I'll ask her for her phone, open the text app and show her the images. She'll say "They weren't there before" and I'll just shake my head.
This happened the other night so I asked her for her phone, looked for the images and, sure enough, they were not there. WTF? About 2 hours later she says to me "The pictures just came in." Yep, there they are, right in the middle of the thread where they belong.
The best I can determine is that the reception where she works is borderline. She'll get all texts, she get some images, she can make phone calls, but some images and videos are delayed. I'm guessing that sometimes they arrive while she's driving home, which would explain why I find them when I look at her phone. However, she doesn't get a text notification, because the text has already been read.
It's very annoying. Of course, being the nice guy that I am I apologized for doubting her techiness every time I found the images after she told me that she didn't get them. I hate it when she's right. ;-)