Should I close my OCBC and move over to CIMB? How many banks is too many for a student? I have 2 bank accounts, OCBC and POSB now, both are the basic savings accounts with super low interest rates?

One important factor for me as a student was the convenience of withdrawing cash easily, especially if there are ATMs widely available. For the 2 most convenient bank accounts with no minimum, you can consider OCBC Frank account (waived till 26 y.o.) and DBS multiplier (waived till 29 y.o.).

If you are student between 18 - 26, you can consider creating a standard chartered jumpstart account which gives you an interest of 2% per annum.