Hi @Devesh_Gupta,
Welcome to the Niyo Community! 
Upon checking, we can see that you have an account with DCB Bank. Unfortunately, to update your mobile number, you will need to either visit any DCB ATM to update your new mobile number or visit the branch directly.
Since you’re currently in Canada, you may want to reach out to DCB Bank’s customer care team at customercare@dcbbank.com for any alternative solutions or guidance.
Feel free to reach out if you need further assistance.
