Hello. I recently switched from an S7 to an S9 and have noticed an issue receiving texts in the last few weeks. There's a location where I spend a few hours each week that does not have service. Once I leave, as I'm driving down the road and come to an area with service again, I will get a text message notification and can see the first few words and who it's from on the ribbon at the top of the screen before it quickly goes away. Once I unlock the phone and open the messages app, the text is nowhere to be found and after weeks of this happening, none of the messages have shown up in the conversations. This has happened to texts from multiple senders, weeks apart. I've never had this issue before and it's incredibly frustrating. If I don't see it as soon as the notification comes through, I'll never know that person had sent me a text. As long as I have service, there has never been an issue with text messages.