@Haywire-SG Still persists but I gave up on it already. Will not mesh the 810v with any router. Only using the wired PAN to port to other routers for wifi usage. Won't waste time on it.

@Dtpw Starhub services just came to replace the 810v router. The no data connection still persists on my Oppo X5 phone but the tech guy using iPhone got no issue. I think there's a compatibility...

I got the router from Starhub 2 weeks again and that's when the nightmare started. Far from an upgrade, the "no data connection" keeps appearing on the SSID and unable to go online. Couple of modules...