Ask for advice! ! ! I use a telecom mobile phone, and a Unicom card is installed in the second slot of the mobile phone. I can answer the phone and send text messages while chatting, but why should ot

Ask for advice! ! ! I use a telecom mobile phone, and a Unicom card is installed in the second slot of the mobile phone. I can answer the phone and send text messages while chatting, but why should others answer it? A: You can check the settings of your mobile phone and see if there is a special display screen where you put your Unicom mobile phone card. You can put another friend's Unicom mobile phone card in the card slot for testing. If the display is normal, it means that there may be a problem with the parameter display of your Unicom mobile phone card. You can contact Unicom customer service to implement it. If this error is still displayed after replacement, it means that the card slot of your mobile phone Unicom mobile phone card may be abnormal, resulting in abnormal caller ID, so you need to contact your mobile phone for after-sales implementation.