Link to send SMS prompt empty

Does the subject want to ask, "What's the matter with Ke Ling's short message prompting null?"? The mobile data function is not turned on. The simplest and most direct way is to send a text message, which prompts that the null mobile data function is not enabled. Link is a new era high-end brand jointly built by Geely Holding Group, Geely Automobile Group and Volvo Cars.