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One way to enforce this is through sanctions, or limits placed on what can be brought into a country.

Usually hardware makers like Google and Apple have different sets of software (and hardware) for the different regions they sell to.

For example, why include a GLONASS chip if your users are in China, where BDS is the GPS system of choice?

https://www.bbc.com/news/technology-50573069

https://www.investopedia.com/articles/economics/10/economic-...

https://www.treasury.gov/resource-center/sanctions/Pages/def...