Might be a policy limitation, a frequency band difference, or just carriers havn't make a deal for 5G international roaming. But overall I keep pessimistic on China's mobile phone eSIM implementation.I think they are already limiting foreign unapproved iPhones by locking 5G behind international eSIM whether the region has 5G signals or not. I can only use 4G with Telstra eSIM.
They used to require a working visa or permernant residency for buying a phone number, which looks like only for people who work and live in China for longer period, not for short term tourists. But the policy was changed in 2024, now any foreigner with passport can buy a SIM with phone number.Only need passport? If that’s the case that is relatively easy.