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?

Can consider Sif, RHB, CIMB, SingLife Trust Bank.

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.).