What causes a phone to stop receiving text messages?

A phone may stop receiving text messages due to several reasons, including poor network coverage, a full message inbox, or issues with the SIM card. Software glitches or outdated operating systems can also disrupt message reception. Additionally, if the recipient has blocked the sender or if there are problems with the messaging app itself, this can lead to missed texts. Restarting the phone or checking settings can often resolve the issue.