INS and diabetes mellitus: ICT group 1: Sweet Talk SMS (automatic scheduled SMS reminder of the goal set, daily tips, and monthly text newsletter on diabetes issues. Participants could reply to the SMS and get an extra SMS for reply) plus intensive insulin treatment and standard treatment (clinic visit once per 3 to 4 months and access to emergency hotline).ICT group 2: Sweet Talk SMS in addition to conventional insulin treatment and standard treatmentControl: standard treatment only