php editor Xiaoxin will answer for you: There may be many reasons why vivo cannot access the mobile network. First, check whether the mobile data function is turned on on your phone. If not, you will not be able to use the mobile network. Secondly, it may be that the signal in your area is unstable or there is a network failure that prevents you from connecting to the mobile network. In addition, some settings may cause the mobile network to be unusable, such as incorrect APN settings or incorrect network mode settings. If none of the above methods work, we recommend that you contact your mobile network operator for specific solutions.
The signal can be restored after turning off airplane mode.
When the mobile phone card is in arrears, the user cannot access the mobile network and needs to pay in time to restore the service.
3. No signal: There is no network coverage where we are, such as tunnels, remote plateaus and other places where there is usually no signal.
4. No traffic: Many mobile phone cards have a certain amount of traffic when used. After the traffic is used up, it will be gone, which will result in the inability to access the mobile network;
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