Let's sort it out, which is that the router and the phone have a weak WiFi signal.
Because the main function of the mobile phone's wireless chip is to receive, while taking into account the battery consumption, in general, the router emits a much stronger signal than the mobile phone, so that when we put the router in the living room, the living room received the signal is almost 60-70, after a load wall, about 7-10db, So the cell phone in the bedroom received the signal is still 53-60, even if two heavy-duty walls, there are 46-50, and did not affect the router in the general home coverage.
And the mobile phone signal is much weaker, when the other one or two load-bearing wall, the attenuation is particularly severe, the router received the signal sent out of the mobile phone will be more difficult to identify, this time the phone received the data sent by the router, will send a confirmation message, tell the router that it received the data can continue to send the next data, But because the router can't recognize the confirmation message sent by the phone, it thinks the phone doesn't receive the data, and then keeps trying to resend it, causing a dead loop, which is why we often see the WiFi signal amplifier on the phone full, but the data transmission is not successful, it is difficult to access the Internet.
