Apple says the issue may stem from having an inactive SIM with the same number as your active SIM. To fix it, remove the inactive SIM and activate iMessage again.

If your texts are falling back to SMS, try these steps to ensure that Apple's Messages app is properly functioning. I started my career with CNET all the way back in 2005, when the (original) Motorola ...

If you're an iPhone owner, you might be familiar with this experience. You're having a back-and-forth conversation with your friend over iMessage, when suddenly there's a lull and your blue bubbles ...