2, the phone bill is insufficient. When the phone bill is lower than 10 yuan, the signal will be bad. The reason for this setting is that you are afraid that your traffic will exceed too much, which will lead to arrears. The speed limit is to remind you that it's time to pay the phone bill. Check the balance first. If it's less than 10 yuan, try restarting your phone.
3. Package flow restriction. Many traffic packages promise limited 4G traffic packages. For example, your own fee is unlimited monthly traffic packets, of which only 50G may be 4G traffic. After exceeding 50G, the speed limit is 2G, but it is still unlimited. Many people pay attention to the unlimited number of self-funded packages, not the amount of 4g traffic. It is recommended to call customer service and ask what you are handling at your own expense.
4, mobile phone failure. This probability is relatively low. Generally, it is the first three.