My wife and I have Lumia 610 phones and have unlimited texting. Several times in the past 2 weeks neither of us have received texts sent by the other. Do we need to delete the existing thread (several years old now) and start a new one or is there another fix? Thank you.
Can u please try to toggle airplane mode to see if that helps. Also, it's possible you were just in a low signal area at the time the texts did not get sent or received. What happens when u send texts to each other right now? Have you ever factory reset the phone at all?