No, you are only allowed to change your plan on the anniversary of your certificate of insurance and not during the coverage period. Kindly contact our dedicated AIA Online Customer Service via e-mail at my.aiaonline@aia.com during the operating hours (8:30 a.m. – 5:30 p.m. on Mon to Thu, 8:30 a.m. – 4:30 p.m. on Fri, excluding public holidays).