[philg54]

I don't know whether this started happening before or after I replaced the battery. I was asked (face to face) by someone why I hadn't replied to their latest text (after several days). I apparently hadn't received it, i.e. it wasn't shown in their thread.

I powered my phone up this morning and the missing text appeared briefly as the top text in that thread, but was then replaced by the previous text. I have removed and replaced the battery, deleted loads of old texts, carried out a software update but it still isn't visible. Anyone any idea what's going on?

[B. Diddy]

Welcome to Android Central! Try clearing the Messaging app's cache in Settings>Apps.

That's a 6 year old phone, presumably running a very outdated Android version, so this could also be due to firmware corruption/obsolescence or failing hardware. I would recommend upgrading your phone to something more current.