hi, im new here im using Tp LInk TL-MR3420 + e398, what your advice on firmware to flash? it is stable for 24-7 use?

on the side note, currently my area in Bercham ,ipoh, are really screw since this month, been cap to 1.5mbps... maxis said they are upgrading from june to july, rebated 50% of my fees, but still, slow like crap... haiz... anyone from ipoh has this issue?