Can the Unicom number be used to make phone calls and send text messages directly abroad?

If your number has international calling function by default, you can call and send short messages abroad directly. However, the general Unicom card does not have the function of international call by default, so you need to apply for it yourself. You can try to open an online business hall or bring your ID card to the local Unicom business hall.

You can receive calls directly from abroad. If your phone is answered for free, then it is answered for free. If you charge, you will be charged according to the tariff standard for answering the phone.