That's interesting. I run a few tests about sa domains like the free facebook and for DITO, TM and other SIM. I'm impressed kasi it actually works without any data at all kasi yung provider mismo ang bumibigay sayo ng free data matched with the content you're trying to recieve (analyzed using: PCapDroid, Wireshark, Passive Domains Monitoring). I'm still not 100% sure but it's what I saw.I think the way no load tricks work is by taking a bug host like smart .com.ph or free.facebook.com, which can be accessed without data charges and then creating a payload to exploit it