I updated in November (late, I know) but ever since then, my friends, when texting who also use iPhones, no longer display in blue. Instead they show up in green as though it's no longer free or unlimited iPhone to iPhone texting. They also have completed the update.
What have I neglected to set up? What am I doing wrong? Is there another step I need to take or has the iOS stopped this service? Pardon, I'm not tech savy but I have tried to research online to no avail.
Could someone please tell me the steps to take in order to reset this up? I would really, very much appreciate it. My friends live 2,000 miles away so it's usually the only way we communicate since there's a huge time difference.
Thank you in advance if you can help me! I hope this isn't a stupid question where I'm the only one out of the loop!