Wireless portable wifi charged the annual fee Very card indicates that the user has purchased the annual fee package of wireless portable wifi, but encountered the problem of network congestion in the process of use. This may be due to unstable network signals, equipment failures, or network congestion. Users can resolve the problem by relocating the device, changing the network environment, or contacting carrier customer service. In addition, you can also consider changing to another service provider or device to get a more stable network experience. At the same time, it is recommended that users fully understand the network environment and device performance before purchasing the annual fee package to avoid similar problems.