Hello. I want to upgrade my router to a better one. Currently, I have a D-Link 878 A1. However, despite the community's efforts, the Wi-Fi speed remains slow due to problems with the Wi-Fi chip. I want to stick with Wi-Fi 5 (AC) and I'm looking for a router with Flash RAM of 256MB. I live in Brazil.
Did you check the TOH?
MT7615 should be okayish from what I know? What issues are you seeing? It is an unfortunate reality that, if you want well supported hardware, you need to stay more or less current. Which is now 802.11ax.
pricey
u6 are supported
or this store at least holds some non-broadcom devices like mikrotik hap ac3
Fear not AX devices, you can disable those new protocols.