Final answer:
The most common mobile marketing delivery channel is text messaging, supported by the fact that a greater percentage of users utilize messaging services over voice calls.
Step-by-step explanation:
The most common delivery channel in terms of mobile marketing is text, or SMS marketing. Based on a survey by Steele in October 2020, it was found that 54 percent of mobile phone users utilized their phones for messaging, compared to 40 percent who used them for voice calls. This indicates that text messaging is a more frequently used mode of communication among phone users, which makes it a strategic channel for marketers to reach audiences.