@ScorpioMx ya I hav been experimenting with 5ghz channels... It works sometimes but since the router here is managed by landlord I can't do more experiments to get perfect channel that works.. But...

suffering with the same problem but its RE305 V1....so is there any beta firmware for V1 RE305 extender? very disapointed with the purchase.. no wonder it was cheap.. just cant handle a strong 5ghz...