In the room, the mobile phone basically has no signal, how to solve it

1. There is no signal or the signal is relatively poor, mainly because the signal will be affected by various factors such as terrain, landform, and high-rise buildings in the process of propagation, such as the current location is in a relatively closed place, and the signal may be affected.

2. If the mobile phone signal of other China Unicom users is normal, the following methods can be used to troubleshoot:

Method 1] Turn on airplane mode, then turn off or restart your phone and try again.

Method 2] Test of changing the phone card to change the mobile phone card to the mobile phone of a family member or friend and try again.

Feedback, we will check and deal with it as soon as possible.

Call customer service** to check whether there is a problem with the operator's signal, resulting in an unstable mobile phone signal, such as in the field or in the area where the signal coverage is not very good, it is easy to lose the mobile phone signal.

Check whether the SIM card is installed and home, the SIM card in the mobile phone may be misplaced due to the shaking of the mobile phone or the mobile phone falling, please disassemble the back cover and reinsert the SIM card again.

Whether the mobile phone is in arrears, although the arrears of the mobile phone will not cause signal loss, but it will lead to the inability to connect to the Internet, please check whether the mobile phone is in arrears.

Whether the internal RF block of the mobile phone is damaged, this module itself is not easy to check, it is recommended to go to the repair shop to check the signal problem.

Whether it is activated or not: Settings - SIM Manager - SIM1 SIM2 - Tap the SIM card icon - Slide to open (different models of mobile phones may operate slightly differently).

3.If there is still no signal, it is recommended to turn off the SIM card and remove it, wipe the SIM card chip with an eraser, and then reinstall it.

4.If it doesn't work, try to change to another location to rule out whether it is caused by poor signal coverage in your location.

5.Try to change the network mode to 3G or 2G (do not select the auto-connect mode). Note: Some machines do not support changing the network mode.

6.Try to change another SIM card.

Note: Please back up the data (contacts, messages, **, etc.) in your device before upgrading. If there is still no signal or emergency call is displayed after the above operations, please bring the purchase invoice, warranty card and machine to the nearest service center for inspection.

In the past, the mobile phone had a signal in the room, but now there is no signal at all, what's going on?

Hello, the phone used to have a signal, now there is no signal at all. First of all, determine whether the place where Runai is now is particularly closed. Change to a more open place to see how the oak is doing, and whether the signal will be better.

In a particularly closed place, it will also lead to poor signal) or change to another mobile phone card, put the mobile phone in the world to see if there is a signal, if there is not, it is a problem with the mobile phone, it is recommended to bring it to the after-sales service, find the relevant staff to solve or repair.

Turn on airplane mode, turn off or restart your phone, and try again. A signal is a physical quantity that represents a message, such as an electrical signal can represent different messages through changes in amplitude, frequency, and phase. There are two types of electrical signals: analog and digital.

A signal is a tool that carries a message and is a carrier of the message. Broadly speaking, it includes optical signals, acoustic signals, and electrical signals, among others. According to the actual use, the signal includes TV signal, radio signal, radar signal, communication signal, etc.; According to the time characteristics, there are deterministic signals and random signals.

A signal is a tool that carries a message and is a carrier of the message. Broadly speaking, it includes optical signals, acoustic signals, and electrical signals, among others. For example, the ancient people used the billowing wolf smoke generated by lighting the beacon tower to transmit the news of the enemy's invasion to distant armies, which is a light signal; When we speak, sound waves are transmitted to the ears of others, making them aware of our intentions, which is a sound signal.

All kinds of radio waves traveling in space, the current in the ** network extending in all directions, etc., can be used to express various messages to distant places, which are electrical signals. People know what they want to say by receiving light, sound, and electrical signals.