Which delivery method allows customers to get support through SMS or MMS?

The delivery method that allows customers to get support through SMS or MMS is instant messaging. Instant messaging encompasses various forms of communication that permit real-time or near-real-time engagement through text, including platforms and channels that support SMS and MMS.

This method is particularly beneficial for customers who prefer quick, text-based communication over traditional methods such as telephone support. Instant messaging allows for immediate responses, improving the overall customer experience by providing support that is both accessible and convenient. While other options like telephone support or remote support involve direct voice communication or technology troubleshooting, they do not facilitate support through SMS or MMS channels, making instant messaging the appropriate choice for this question.