Sub request letter for change of mobile number respected sir it is humbly requested that i own current account number 000 123 456 in your bank i am also availing your mobile banking service i have recently changed my mobile number to 9contact number kindly update my new number in your record. Write your sbi account number name and your state bank of india branch name or code next tick on change of mobile number field and write your new mobile number now write the date of submission place and finally sign the application form there is no need to fill the annexure field. Application for change in mobile number customer name customer id old mobile no new mobile no the above details would get updated only in all accounts fixed deposits held with the bank the details for credit card loans will not get updated customer . Change contact number with hdfc mobile banking if online banking is not something you are used to and you happen to use phone banking or hdfc mobile banking service already you have option to update your residence and company phone number from hdfc mobile banking app you can do so by logging into your app your profile personal profile