QUOTE(Neomax3 @ Aug 5 2017, 12:15 AM)
how bout band selection? is it available or we have to use tool box? LMT version I mean
LMT doesn't allow you to change band from UI but it will show a very comprehensive signal status.
QUOTE(suilow1991 @ Aug 5 2017, 12:45 AM)
Hi, I accidentally bought the e5186-61a version from Sing4G and realised it cannot perform CA.

Anyone can guide me to optimize it performance through settings at least?
Return it.
As for a more practical suggestion, play around with frequency and try to place it at a better spot for signal reception.
QUOTE(fruitie @ Aug 5 2017, 01:12 AM)
Totally forgot about this. My apologies. I will try it later today.
Got it. I just need some courage to start doing it.

Assuming if I really brick it, any chance to unbrick it? *touch wood*
Well, it depends how severe is the brick. It is not an easy router to brick
Try the basic method and see if it can change your firmware version, only use the advanced method if the basic method fails to update the firmware.