What if Unicom's mobile phone card has no service?

First of all, check whether your location is a signal blind area and whether the neighboring Unicom users can use it normally. If this happens, we suggest that you call 100 10 to report the network failure. If other users can use it normally, it is necessary to check whether the phone is faulty or the card is in poor contact. I suggest you try another mobile phone, or insert a card and try again. In addition, the cancellation number will also show that there is no service. It is suggested that the owner bring his ID card to Unicom's own business hall for testing or handling the card replacement business.