Can I customise my UPI IDs (VPA)?

You can create a VPA of your choice, as long as it is still available and not already been taken by another user on PhonePe. 

Your VPA should contain at least 3 characters, which may include letters of the alphabet, numbers or special characters (only - and .), followed by a handle (@ybl/@ibl) that will be assigned automatically.

Note: Once you create a UPI ID (VPA) on PhonePe, you cannot modify it.