GMAT Date Change

Tell me how to Change GMAT entrance exam, will you please provide here details related to GMAT entrance exam, is three any
Onilne proeudre to get that all details???

[Quick Sam]

You may reschedule your exam online. To reschedule by phone, call the number below for your region.
To reschedule your exam in a country other than the one in which you scheduled your original exam, please contact us by phone.

Americas:

Telephone (toll-free): +1 (800) 717-GMAT (4628), 7:00 a.m. to 7:00 p.m. CT
Telephone: +1 (952) 681-3680, 7:00 a.m. to 7:00 p.m. CT
Fax: +1 (952) 681-3681

Asia Pacific:
Telephone: +852 3077 4926, 9:00 a.m. to 6:00 p.m. AEST
In India: +91 120-439-7830, 9 a.m. to 6 p.m. Indian Standard Time
Fax: 6038319 1092

China:
Telephone: 86-10-8234-5675, 8:30 a.m. to 5:00 p.m. China Standard Time
Fax: 86-10-61957800

EMEA:
Telephone: +44 (0) 161 855 7219, 9:00 a.m. to 5:00 p.m. GMT
Fax: +44 (0) 161 855 7301