Home |RG RG 1 Answers, 135 Claps, 3226 Views Share × Feeds Questions Answers Guides How to change mobile number in fastag from IHMCL? Mobile number cannot be changed for IHMCL FASTag after wallet creation. You have to close the TAG and buy new one 1 135 3226 No questions added by RG. How to change mobile number in fastag from IHMCL? Mobile number cannot be changed for IHMCL FASTag after wallet creation. You have to close the TAG and buy new one 1 135 3226 No Guides added by RG.