But I can get a text message. What happened? Unicom card can't make a phone call or come in?

If you can't make a call, according to the information you provided, it should be caused by insufficient balance. You can also troubleshoot in the following situations. The common reasons why mobile phones can't answer calls and their solutions are as follows:

1 Check whether the mobile phone is in arrears, and suggest paying for recharging;

2. Check whether the mobile phone is set with call forwarding, flight mode on and call barring. Suggest canceling and try again; 3 Check whether the function or signal of the mobile phone is normal. It is recommended to change your mobile phone or location and try again. 4. If roaming to other places can't be used, it is recommended to check whether the local network signal is normal and whether roaming permission is enabled for this number; 5 try to restart or change your mobile phone to see if you can answer the phone; Take your mobile phone card to the local business hall for testing or replacement. The above situation remains unresolved. It is recommended to contact the Unicom customer service to which the number belongs.