If I take off my mobile phone card and battery and reinstall them for two days, can I see other people's calls and text messages in these two days?

You must apply for Unicom or mobile payment service which can be reserved for you. . . Text messages are generally invisible. Because although SMS can be set to be valid for up to one week, according to my experiment, the general service only supports 24 hours, even if there is such a long time limit. It must be set before it can be used. Generally, the settings for collecting default information are very short-lived. .

Therefore, except for the operator's message, which will be automatically forwarded, you can't receive other messages naturally if you don't turn it on.