Based on the sms I received, it only applies to those who has the a limit of 1GB and above. Those still on 250mb or 500mb still have the limits as I understand it.

I'm still facing disconnection from my office Netgear router, where I need to configure IP, Subnet, Router, Gateway ... but I have no issue with my home wifi.

Only in office it disconnects and requires me to input the password each and every time. I thought updating to 6.0.2 would solve it. But it didn't.

I finally remedied my wifi disconnection issue at office. Changed security settings from WEP to WPA-PSK(TKIP). Works like a charm now and doesn't disconnect.

Thankfully for being the adminstrator of my office network

That's because you have not peel away the original plastic protector that came with the phone. Common mistake people do ... If you have peel that off, then go get a phone replacement.