How to determine the speed limit of Unicom card and how to cancel it?

1. When surfing the Internet with the linked mobile phone number, sometimes I suddenly find that the network speed is slow and even the webpage is stuck.

2. Use SMS or call customer service to ask if the phone is in arrears, or for other reasons.

3. Now there are some ordinary cards, and the traffic packages are all speed-limited. If it exceeds 40G, the speed will be reduced.

4. There are also some traffic package cards that give away fixed traffic. For example, Ali Dabaoka has only 5G per month after the upgrade, and there may be extra charges or speed limit.

5. After the above related reasons are eliminated, we should also check the mobile phone and mobile phone card. Is there a problem?