Why is there no signal for my OPPOA37? 5

If there is no signal on the mobile phone, you can go to Settings - About the mobile phone - SIM card status - signal strength to check what the current signal of the mobile phone is. You can restart the phone or change the location to check whether the signal strength has changed.

A37 (Mobile Version) supports mobile 4G 3G 2G for the main card, 2G for the supplementary card, and dual SIM can be switched.

The A37M (All Netcom) main card supports mobile telecom 4G 3G 2G, China Unicom 4G 3G, and the auxiliary card supports mobile telecom 2G.

A37T (Mobile Strategic Cooperation Version) has a mobile card to use, only mobile is allowed to use the 4G network, the other card can only support the 2G network, the Unicom card can support up to 3G network, when there is no mobile card to use, you can use the Unicom 4G network normally, do not support the use of telecom cards.

If there is no signal on your phone, we recommend that you try the following steps:

1. The network mode selected by the mobile phone is not covered in the local area, it is recommended to change the network mode (Settings - General - Mobile Network Data Network), choose 2G, or 4G 2G, 4G 3G 2G comparison;

2. Try to re-insert or replace the SIM card to eliminate the SIM card failure.

3. The location of the mobile phone belongs to the area with weak signal coverage or the area with alternate signal coverage, it is recommended to restart the mobile phone and change the location of use;

4. There is strong magnetic field interference in the use environment of the mobile phone, compared with other mobile phones.

If none of the above methods can solve your problem, please bring the purchase invoice, warranty card and mobile phone to the nearest OPPO customer service center for testing and processing.

If the mobile data network is not available, it is recommended that you try the following methods.

2. If you are in a special area (bus station, high-speed rail station, basement, elevator), the mobile phone signal will be affected, it is recommended that you leave such an area for a distance and try again.

3. Take out the mobile phone card and reinstall it.

If the above methods still cannot solve your problem, it is recommended that you bring your mobile phone and purchase voucher to the nearest OPPO customer service center for testing and processing by professional engineers.

This is available for all OPPO models.

If your phone has no signal and the network is unstable, we recommend that you try the following methods:

1. Please confirm whether the mobile phone system version has been updated to the latest, and upgrade the mobile phone system version to the latest in the mobile phone settings > shutdown height is greater than the local > software update.

2. It is recommended to use the original Nianyou protective case of the mobile phone, and do not use metal or gold-plated protective case.

3. If it is in a special area (bus station, high-speed rail station.

basements, elevators), cell phone signal will be affected, and it is recommended that you try again after leaving such areas for some distance.

4. If SIM card.

Hardware damage can also cause signal abnormalities, so it is recommended that you swap the SIM card to another mobile phone for comparison.

5. If there are problems with other mobile phones in the same area, it can be determined that it is a network problem with the operator, and it is recommended that you feedback the problem to the operator for processing.

If none of the above methods can solve your problem, please bring your mobile phone purchase voucher to your local OPPO official authorized service experience center or choose Round-trip.

Free postage repair service to send your mobile phone to a designated service centre for processing.

A 37 is divided into A 37T and A 37M

A 37T is a mobile customized version of the mobile phone, you can't place a telecom card, if both mobile phone cards are mobile, you can use it normally and switch the 4G network at will. If one Unicom and one mobile, only the mobile 4G network is supported, and the Unicom supports 2G, if there are two Unicom cards, you can switch the 4G network at will.

A 37M is a full Netcom mobile phone, which can put telecom cards, and the traffic can be switched at will to use the 4G network.

You can open your phone settings, about the phone, and see if your phone is a 37T or A 37M

If there is no signal on a 37M telecom card, it is recommended that you try a different telecom card. If you can, go to the branch office and replace the SIM card. If not, it is recommended that you bring your warranty card and go to the nearest OPPO customer service center to test and repair it.

If there is no signal on your phone, you can check it by the following methods:

1. Check whether the SIM card is inserted into the mobile phone: you need to insert the SIM card to connect to the signal.

2. Check whether the mobile phone card slot or SIM card is damaged: you can insert other mobile phone cards to try, and then put the SIM card of the mobile phone itself on other mobile phones to see if there is a signal, if the card slot is damaged, it is recommended to replace the card slot, if the SIM card is damaged, please go to the business hall to replace the SIM card.

3. There is no service on the mobile phone caused by network delay.

4. If the signal in the place is not good, the signal cannot be found, so you can search in another place.

5. There is no card or card is damaged, and the 5G is one step faster, the traffic is half cheaper than 4G, and the broadband speed is 500M. Customer service number 107 will answer for you.

The reason for the bad signal is that the signal will be affected by various factors such as terrain, landform, and high-rise buildings in the process of propagation

1. Turn the phone on and off again;

2. Swap the SIM card to a family member's or friend's phone and try again;

3. Check whether there is a signal from other Unicom users around;

If the above situation has not been resolved, it is recommended to contact the manual customer service of the place where you belong for processing.

There is no signal on your phone, so it is recommended that you try it as follows:

1. If conditions permit, please compare whether there is this problem with other models, if there is also a signal coverage that may be poor for the local network operator;

2. Replace the SIM card and eliminate the SIM card failure;

3. In places with more concentration, it will lead to congestion in the use of data networks, and the use environment can be replaced;

4. There is a certain strong magnetic field interference in the local area, which will affect the signal, please change the use position to observe;

5. If the problem still exists, please bring the purchase invoice, warranty card and machine to the OPPO customer service center for testing, and the professional engineer will solve it for you.

If the mobile phone signal is unstable, it is recommended that you try the following methods:

Restart the phone and observe whether it returns to normal;

Try to re-insert or replace the SIM card to troubleshoot the SIM card;

When using the mobile phone, you find that it is stuck and slow to respond.

Depending on the actual situation, you can understand what to do:

Increase the speed of your phone.

Slow response when lagging while charging.

The program is running and the response is slow.

Slow response after upgrading.

If none of the above methods can solve your problem, please bring the purchase invoice, warranty card and mobile phone to the nearest OPPO customer service center for testing and processing.

If you find that your phone is stuck and slow to respond, you can try to see if it improves from the following aspects:

Use the latest system version.

Clean your phone's cache regularly and turn off apps running in the background.

Try to use as little dynamic desktop plug-ins as possible, as widgets with real-time refresh will always run in the background, taking up your phone's running memory.

Do you have such a problem when you are running another game, you change the game to view, or you clear the CrossFire game data view.

The reasons why there is no signal on the OPPO A33 mobile phone card are:

First look at whether the mobile phone recognizes the SIM card, if it is recognized, flash the phone to try, and then it doesn't work, the mobile phone hardware is malfunctioning.

Try to re-insert or replace the SIM card to troubleshoot the SIM card;

If the location of the mobile phone is in an area with weak signal coverage or alternate signal coverage, it is recommended to restart the mobile phone and change the location.

There is a strong magnetic field interference in the use environment of the mobile phone, compared with other mobile phones.

If there is no signal on the mobile phone, you can go to Settings - About Mobile Phone - SIM Card Status - Signal Strength to check what the current signal of the mobile phone is, and you can restart the mobile phone or change the location to compare and check whether the signal strength has changed.

It is also caused by non-standard card cutting, so it is recommended to go to the business hall to return a new card to try.

Check whether the SIM direction is reversed.

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 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.