What caused the lack of cell phone signal, let's take a look
If there is no signal on the mobile phone, the mobile phone becomes a device immediately, unable to call, cannot send text messages, and the network will not be connected. So what are the solutions for weak cell phone signals?
1. See if your location is currently in a signal blind zone. The blind zone includes areas outside the network coverage area, such as workshops, factories, suburbs, and rural areas where network communication facilities have not been built, and urban signal mobile phones cannot be covered by shielding and blocking signals. Places, such as office buildings, bar rooms, elevators, underground places, buildings, etc.
Solution: Walk out of the venue where there may be no signal and make a call to a wide area.
2. If there is no problem with the location, it may be caused by the portable jammer equipment. The mobile phone receives the signal through the propagation of electromagnetic waves, so the base station establishes a connection between the mobile phone and the mobile phone to achieve the purpose of voice calls. The interference of electromagnetic waves will affect the mobile phone signal, this situation will generally appear in the examination room.
Solution: Find the surrounding signal wifi jammer equipment, close or remove it.
3. If there is no problem with the location, it may be caused by the interference facilities. The mobile phone receives the signal through the propagation of electromagnetic waves, so the base station establishes contact with the mobile phone by transmitting radio waves, so as to achieve the purpose of voice calls. The interference of electromagnetic waves will affect the mobile phone signal, this situation will generally appear in the examination room.
Solution: Find the surrounding signal interference equipment, just turn off or remove it.
4. It is not due to external factors that the mobile phone has no signal. It is likely that the battery voltage is unstable. The circuit receiving the signal has insufficient power supply and the voltage is fluctuating. The signal reception cannot be stabilized. In this way, the mobile phone cannot access the Internet, and even the phone cannot be dialed.
Solution: Replace the phone with a higher quality and the signal problem will be fixed.
5. If the surrounding signals are okay, you can also check the software of your mobile phone to see if any software has started the flight mode, or if the flight mode is called on a regular mission, or if some software will open the signal connection. Try to clear the software running on the phone memory, or restart it.
6. In addition, if the mobile phone often has no signal, you can also see if there is a problem with the SIM card. Take the card out and try it on other mobile phones to see if it is a mobile phone problem or a SIM card problem, lock the source of the problem, and then take the medicine.
7. If the lock is a mobile phone problem, it may be that the mobile phone receiving circuit is faulty, most of them are in the antenna switch, of course, this kind of maintenance needs to find a professional.