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Check the adjusted result before upgrading
When you upgrade a monthly plan mid-cycle, the price difference is converted into remaining days. An upgrade does not simply add a full billing period, and you should not assume an unconfirmed amount has been credited. In the panel, first check your current plan status, then review the target plan and order details. If you have questions about the adjustment, contact support through a ticket before confirming the order.
Data usage is a better guide than time spent online
The same time online can use different amounts of data depending on whether you're chatting, loading generated images, streaming video, or transferring files. When you first start using the service, watch your main activities and data usage in the panel before deciding whether to change your allowance. Unlimited devices helps you use your devices flexibly; it does not mean each device gets a separate data allowance.