To determine if glucometer combined with mobile-phone based data transfer system would be useful for patient diabetes to manage their glycemic control.

Patients with diabetes who are advised by their providers to self-monitoring of blood glucose are eligible. Patients who decline or are not able to do self-monitoring of blood glucose will serve as controls.

Inclusion Criteria:

1. Patient with diabetes
2. Patients' providers advised self-monitor of blood glucose
3. Provided written informed consent.

Exclusion Criteria:

1. Patients had other medical condition that were considered not eligible by the medical team members