On: Samsung phones force Mainland China DNS service up...

[captn3m0]

> If you roam on the mainland with a HK SIM you actually hop the GFW automatically

This is quite interesting. So GFW is applied by ISPs exclusively on domestic SIMs? Does this mean any international SIMs on roaming hop the GFW?

[vetinari → captn3m0]

When you are roaming, your traffic should be tunneled to your home provider and go to open Internet from there.

[e_y_ → captn3m0]

I think the traffic gets proxied (not sure if it's encrypted) back to servers run by your home carrier. So conversely if you use a China Mobile SIM in Hong Kong or overseas your traffic gets firewalled.

[londons_explore → captn3m0]

Yes.