Push for mobile phones that have open source operating systems like GrapheneOS. It'll probably be the most secure and private device you'll ever own. Then the issue is making these proprietary systems like WeChat, Google Services, whatever China uses. These should be accessible, and if it's required for day-to-day life then you're entitled to know every line of code you're forced to rely on.

You can't even open a bank account without a smartphone in China

I only use cash at the pot store.

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