Can't I answer the phone or send a text message with Unicom?

Dual-card dual standby single call means that two numbers can "stand by" at the same time, but they can't "talk" at the same time. In standby mode, any phone number can be dialed; But if one of them is on the phone, the other number can't answer the phone, and can't connect and make calls.

Double-card and double-standby call can answer the phone and send text messages.