The cell phone signal is unstable.

Why is my mobile phone network always unstable?

There are many reasons for the instability of mobile phone network, and the corresponding solutions are different for different reasons.

The solution to the instability of mobile phone network is as follows:

1, select highland to use mobile phone.

In the past, in my hometown, mobile phones were often in a state of no signal on the first floor. However, after taking the mobile phone to the second floor for use, the mobile phone signal basically has three or four grids, which is relatively stable. So, when the signal is bad in your place, you might as well go to a higher position and use it in a window. Can many solve the problem of poor cell phone signal?

2. Switch different mobile phone networks

There are three major mobile phone network operators in China, namely China Mobile, China Unicom and China Telecom. All three network signals exist at the same time. When you use the mobile network and the signal is not good, friends with conditions may wish to use the card of Telecom or Unicom, which can solve the problem of poor cell phone signal in many cases.

3. Choose different networks to improve the cell phone signal.

Previously, on the first floor of the residential area where the author lived, the signal with China mobile card was very poor. However, I used my friend's China Telecom's mobile phone once and found that the signal was all full. The signal of my mobile card often showed no service. So, when the cell phone signal in your home or community is not good, I might as well test other network signals.

4. The cell phone signal amplifier enhances the cell phone signal.

At present, a device called mobile phone signal amplifier, which is popular on the network, is welcomed by users in remote villages, basements, families or communities with poor mobile phone signal. Cell phone signal amplifier can amplify the cell phone signals around us, thus improving the network quality. It is very practical for users in some communities and basements with low positions.

What if the cell phone signal is unstable?

Small problem, professional maintenance tells you that your mobile phone is a weak signal, and the general fault is poor connection of the built-in antenna, so just correct it; The antenna converter, antenna switch and 900M receiving filter are welded or damaged. To put it bluntly, the receiving circuit is not smooth, and the general maintenance price is above 40 yuan. The specific price depends on regional competition and the value of mobile phones.

In addition, if you want to change a mobile phone with strong signal and real function, you can use any low-end Nokia mobile phone, and you don't need any specific model, because the single signal storage function is basically the same. I'm telling you, the specific model is not as good as the actual situation when you arrive at the communication shop. I'll tell you what model of Nokia you may not be able to buy at the communication shop, so the price is basically below 1000 yuan according to the situation. .

. Small problem, professional maintenance tells you that your mobile phone is a weak signal, and the general fault is poor connection of the built-in antenna, so just correct it; The antenna converter, antenna switch and 900M receiving filter are welded or damaged. To put it bluntly, the receiving circuit is not smooth, and the general maintenance price is above 40 yuan. The specific price depends on regional competition and the value of mobile phones.

In addition, if you want to change a mobile phone with strong signal and practical functions, I recommend you to use Nokia.

.

Why is my cell phone signal unstable? !

Generally, there are three situations: one is the signal problem of your location. When you make a phone call, there are only three or four grids, which means that the initial seven-grid signal is also a virtual signal. If so, the only thing that can be proved is the test of mobile phone users who are with you at the same time. They are the same operator as you. If they are all mobile or Unicom, if the signal problem can be demonstrated, the operators who do network and base station maintenance will query and handle it. The other is the mobile phone problem. You can change the card to someone else's mobile phone to see if it works, or you can use it elsewhere without changing the mobile phone, or you can try to see if it is a mobile phone problem. If it is a mobile phone problem, you can take out the card and try to wipe the place where the card touches the mobile phone. The last one, but this kind of situation is rare, is the card problem. This card can only be used for testing, and the general card will not happen. I'll call you when there is no signal, and the recorded notice will prompt you to turn it off. Generally, the recorded notification was sent incorrectly.

The same thing happened to my previous mobile phone, that is, the contact between the card and the mobile phone. I remember that there is a Guangzhou mobile phone repair company, which has many tips. The website seems to be gz.easiu If necessary, you can Baidu it.

The cell phone signal is unstable. What happened?

Cutting card

Nowadays, many smart phones require that SIM cards must meet certain specifications before they can be used, which leads to the fact that most normal SIM cards cannot be directly inserted into the card slot and can only be used by cutting cards. However, improper operation in the process of card cutting will also affect the cell phone signal. In this case, it is recommended to replace the regular Nano SIM card in the business hall.

Shut down the 4G network

First, confirm whether your SIM card supports 4G network. If not, it is recommended to turn off the 4G network settings of the mobile phone, because 4G network signals will also affect 2/3G signals.

Restart the phone

If your SIM card supports the 4G network, you have opened the 4G network. In this case, if the user's local 4G signal coverage is small, it will also cause signal instability. So you can try to shut down the 4G network and restart the phone to see if it can be solved.

Avoid placing it on objects with metal surfaces.

When the mobile phone is placed on a metal surface, or the mobile phone case is made of metal, it will also affect the signal.

Check whether it is the operator's problem.

In the same use environment, try to put the SIM card on another mobile phone. If the signal is still poor, it may be the operator's problem.

What is the reason for the unstable cell phone signal?

First of all, mobile phones in the signal blind area will cause "out of service area", "temporarily unable to connect" or call interruption. This blind area includes places outside the network coverage area, such as workshops, factories, suburbs, rural areas and other places where network communication facilities are not built, as well as places in the city where mobile phones are blocked by shields and signals cannot be covered, such as office buildings, bars, elevators, underground places, buildings and other places. This situation can be well solved by artificial gain, such as adding a cell phone signal amplifier. [Cell phone signal amplifier cell phone signal enhancer cell phone signal is unstable, what should I do if the cell phone signal is not good]

Secondly, the phenomenon of poor signal caused by interference. Because the signal received by the mobile phone works through the propagation of electromagnetic waves, the base station establishes contact with the mobile phone by transmitting electric waves, thus achieving the purpose of voice call. Therefore, the interference of electromagnetic waves will have a negative impact on mobile phones. When the interference of some electromagnetic waves in the air exceeds a certain level and the signal-to-noise ratio of the mobile phone drops below the standard value, the mobile phone will have no signal or be disconnected. Check the surrounding signal sources and interference sources. [Cell phone signal amplifier cell phone signal enhancer cell phone signal is unstable, what should I do if the cell phone signal is not good]

Third, the call was dropped due to handover failure. Network operators transmit wireless signals through base stations to serve users. The range of base stations is limited, so there may be many base stations in an area. All base stations are combined into a network system, and each base station has its own coverage. If it exceeds this range, the mobile phone will have to change the base station, so as to keep the mobile phone online all the time. When the user crosses one service cell to another during the call, the voice channel of the user will also be switched from the original service cell. However, if the new service cell is busy at this time and there are no extra channels allocated to the user, the switching of the service cell will fail, and the call process of the user will be interrupted. Adding base stations can appropriately alleviate this situation, but it will also increase the cost. Users can add amplification and enhancement receiving devices according to their own conditions. [Cell phone signal amplifier cell phone signal enhancer cell phone signal is unstable, what should I do if the cell phone signal is not good]

Also, due to temporary network failure, or the network is particularly busy, it will also cause poor cell phone signal. For example, in a busy business district, there may be cases where the phone cannot be dialed out or dialed in.

Android phone signal is unstable, how to enhance the signal?

If the cell phone signal is unstable or poor, we suggest you try:

1. It may be that the signal coverage of your location is poor. I suggest you restart your phone or try another location.

2. Turn off the phone, take out the SIM card, and rub the SIM card chip with an eraser.

3. Replace other SIM cards.

4. If the signal is still bad, try to update the mobile phone system version.

5. If the above problems still occur after the update, please back up the mobile phone data (phone book, SMS information, multimedia materials, etc.). ) and try to restore the factory settings.

If the problem still exists after the above operation, it is recommended that you bring the purchase invoice, three-guarantee certificate and mobile phone to the local Samsung service center for inspection by engineers.

Methods of enhancing cell phone signal:

1. Unicom 3G mobile phone can change the network frequency band to 2G mode: Settings-More Settings-Mobile Network-Network Mode-GSM only.

2. Try to use your mobile phone in an open place with good network signal.

What is the reason for the unstable cell phone signal?

There may be many reasons for the instability of mobile phone signal, such as poor signal in your place, incorrect mobile phone settings, and mobile phone hardware problems.

1. Signal strength varies from place to place. For example, in the underground garage, the signal in the elevator will be poor, and the signal in remote areas will be even worse.

2. The reason for the so-called mobile phone setting is that the 2G network signal, 3G network signal and 4G network signal in the same place are different. If the signal of 4G network is not good, it is suggested to switch to 3G network or 2G network, so the signal will be much better.

3. Hardware reason: It is caused by virtual welding of components in the receiving channel (this kind of fault is easy to happen on the dropped mobile phone). Mainly repair the receiving filter, acoustic surface filter, intermediate frequency filter, receiving ic and other components, most of which can be restored to normal.

The cell phone signal is unstable.

1. The preferred network setting method of GSM network is as follows: (commonly known as: 2G card) The full name of GSM is: Global System for Mobile Communications, which is called "GSM" in Chinese. It is the technical standard of mobile communication originated in Europe and is the second generation mobile communication technology. Its development purpose is to enable all parts of the world to use the same mobile phone network standard, so that users all over the world can use a mobile phone. At present, China Mobile and China Unicom each have a GSM network, which is the largest mobile communication network in the world. 1. Enter * # * # 4636 # * * 2 in dial mode. Enter mobile phone information. 3. Set the preferred network type: select GSM Auto (PRL). 4. Return to standby for 5.30 seconds. Your mobile phone signal is as strong as Nokia's. Note: When your mobile phone card is confirmed to be 2G, you can directly choose the preferred network as: GSM only, status,. This setting method is also relatively power-saving for mobile phones, and the signal is relatively stable. Second, the preferred network setting method of WCDMA network is as follows: (commonly known as 3G card) WCDMA is the English abbreviation for DIY multiple access of broadband code, and it is the third generation wireless communication technology. CDMA Broadband CDMA is the third generation mobile communication system specially formulated by 3GPP, which is based on GSM MAP core network and takes UTRAN(UMTS terrestrial radio access network) as the wireless interface. At present, WCDMA has Release 99, Release 4, Release 5, Release 6 and other versions. At present, China Unicom adopts this 3G communication standard. 1. Enter * # * # 4636 # * * 2. Enter mobile phone information. 3. Set the preferred network type: select WCDMA automatic (PRL). 4. Return to Standby Note: When your mobile phone card is confirmed as 3G, you can directly select WCDMA only as the priority network. Every time a mobile phone searches for a signal, WCDMA network takes precedence, and the signal is relatively stable. The power saving effect is slightly higher than that of 2G network. Third, the preferred network setting mode of GSM/WCDMA network is as follows: (commonly known as: the card supports 2G/3G) 1. Enter * # * # 4636 # * * 2. Enter mobile phone information. 3. Set the preferred network type: choose the above method of GSM/WCDMA auto(prl), and the engines may wish to try it. It is true that there is no corresponding preferred network, and the mobile phone signal is often weak or unstable. Follow-up: Please pay attention to this problem. Suggestion: When your SIM card is any network, please give priority to the corresponding network type, especially DHD mobile phone, whose battery is only 1250MAH, which is also very helpful when choosing communication network (personal experience, for reference only).