ZenSim does not offer truly unlimited high‑speed data plans for China. All of its China‑specific offerings have a defined data cap, even those with “Unlimited” in the name. The “Asia+ Unlimited STANDARD” and “China Unlimited STANDARD” plans provide a daily allotment of 2 GB; once that amount is used the connection speed is reduced, the rate of which is specified in the plan’s details.
Travelers who need more data can choose a fixed‑data plan such as the 20GB 10‑day or 20GB 30‑day options, which give a larger total allowance and avoid the speed throttle. Selecting a fixed‑data plan can be more cost effective unless a user anticipates consuming a very high volume of data beyond the 2 GB daily limit.