Both can be used, mainly depending on which manufacturer you prefer. I don't know about Unicom, but mobile cards usually have prepaid phone charges, usually around 30 yuan. Now Mobile has cooperated with the education department and related universities to have such welcome activities. You can use your card on your mobile phone. Generally, you can call 10086 to participate in the activities in the holiday province immediately after attending the activities, and you can use it. Before September, there was no roaming charge for calls in the province, and local and long-distance calls were the same price.