SMITHSON VALLEY, TX--(Marketwired - February 23, 2017) - Two leading South Texas companies are joining forces to help qualified home buyers and sellers earn thousands of dollars in cash-back credit rewards. The GVTC Just Plain Smart Move ProgramT is a unique partnership between the Hill Country based fiber communications company and Coldwell Banker D'Ann Harper, REALTORS® (CBHarper), one of the market's top real estate organization.