How do I check/change the bank account linked with my portfolio?

You don’t have the option to change the bank account linked with your portfolio on PhonePe right now. 

To change the bank account linked with your portfolio, 

1. Download the form from your AMC’s website.
2. Fill in the required details such as the name, PAN, and portfolio number.
3. Add details of your current and new bank account.
4. Sign the form and submit it with cancelled cheques of the old and new bank account at the nearest AMC office or at the office of the Registrar and Transfer Agents (RTA) of the AMC.

Related question(s):

How do I view and modify my account details?
How do I download my Tax Saving (80C) Statement for my mutual funds investments?