Flysimio does not provide a true unlimited high‑speed data eSIM plan for China. The plan titled China mainland Unlimited offers a daily high‑speed allowance of 2 GB over a 7‑day period, so the data is capped rather than unlimited.
For travelers who need more data, Flysimio offers several fixed data plans. For example, the China 50GB 30Days plan delivers 50 GB of 5G data for 30 days at $62.50 USD, and the China 20GB 30Days plan provides 20 GB of 5G data for 30 days at $25.63 USD. These fixed plans can be more cost‑effective unless one expects extremely heavy data use.