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A comment on Samsung phones force Mainland China DNS service upon Hong Kong WiFi users. Parent comment

Re:Samsung phones force Mainland China DNS service upon Hong... by captn3m0 on Sunday October 18, 2020 @01:05PM (#24819287)
> 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?

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Re:Samsung phones force Mainland China DNS service upon Hong... by vetinari on Sunday October 18, 2020 @01:33PM (#24819567)
When you are roaming, your traffic should be tunneled to your home provider and go to open Internet from there.
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Re:Samsung phones force Mainland China DNS service upon Hong... by e_y_ on Sunday October 18, 2020 @01:21PM (#24819431)
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.
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Re:Samsung phones force Mainland China DNS service upon Hong... by londons_explore on Sunday October 18, 2020 @01:16PM (#24819383)
Yes.
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