The mobile phone card shows an exclamation mark, is there no signal?

If there is no signal on your phone or an emergency call prompt is displayed on the screen, it is recommended:

2.If it is a dual-SIM phone, please check whether the SIM card is activated: Settings - SIM Manager - SIM1 SIM2 - Click the SIM card icon - slide to turn on (the operation mode may be slightly different for different models of mobile phones).

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.

7.Update your phone's system version: Settings - About Phone (About Device) - Manual Update Automatic Update (Software Update System Update - Update). 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 receipt, warranty card and device to the Samsung service center for inspection.

The mobile phone prompts "urgent call", and there are generally the following reasons for this situation:

1.It is possible that the mobile phone card does not match the mobile phone;

2.If the mobile phone card is damaged, it is recommended that you bring a valid certificate to the business hall to replace the card;

3.Poor contact with your phone or your location is caused by a dead signal or a sudden lack of signal.

If the Apple message exclamation point is caused by the text message cannot be sent, you need to restart the "iMessage" function to cancel it, and the specific operation method is as follows:

1. Take Apple 8

For mobile phones, for example, first click the "Settings" system icon, as shown in the figure below.

2. Then click on the "Info" option, as shown in the figure below.

3. Then turn the right on/off button of the "iMessage" option and restart it as shown in the figure below.

4. If you want to clear the exclamation mark on the message, you also need to restart the Apple phone, as shown in the figure below.

5. When you wait to turn on your iPhone again, click the "Info" icon again, as shown in the figure below.

6. Then send the unsent message, as shown in the figure below.

<> demo model: iphone12 && huawei p40 && xiaomi 11 system version: mobile phone text message can not be sent to display exclamation mark there are 4 situations.

1. The SMS center number is set incorrectly, please reset the correct SMS center number.

2. If there is no signal or the signal is relatively poor, you can go to a place with a strong signal for testing.

3. If the SMS sending function is turned off on the mobile phone, you can turn on the SMS function and try again.

4. If you are included in the SMS blacklist, you need to go to the business hall to remove the blacklist status before you can use it normally.

This is the reason why the phone cannot be equipped with a SIM card. The reasons for this phenomenon are as follows:

1. The card does not match the source regret style and the manual mechanism. Only suitable cards can be replaced.

2. Mobile phone network, not set to auto-match. You can change it to Settings, Network, and Network Discovery to Automatic.

3. The SIM card is damaged, of course, there is no problem here, other phones can be tried.

4. The card pin of the SIM card slot is broken, and this is the only way to replace the card slot.

The exclamation mark is an indication of no service, and here are the reasons and solutions

Check whether the mobile phone is inserted into the SIM card, and the mobile phone needs to be inserted into the SIM card to have a signal; Check whether the SIM card slot or SIM card is damaged, insert another mobile phone card 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 phone is not serviced due to network delay, turn on the airplane mode of the phone, turn it off after five seconds, or restart the phone; The signal in the place is not good, and the signal cannot be found, so you can change the place and search Zheng Fang again.

This icon represents that the phone has turned on the "data saving mode", after turning on the mode, the notification bar will have an icon with a two-way arrow in a circle, if you need to turn off the data saving mode, you can follow the following steps:

First, turn on the mobile phone, and click on the desktop of the mobile phone to open the "Settings" icon.

2. After entering the settings, click on the first item "Wireless and Network" (the upper right corner of the picture below is the data saving mode icon, one up, one down two-way orange smile arrow).

3. In the wireless and web interface, click "Traffic Management".

4. Find "Smart Data Saving" or "Data Saving Mode" on the interface (the name is different according to the system version) and click to open it.

5. After turning on Smart Data Saver, click to turn off the "Smart Data Saver" switch.

6. After turning off the function, the traffic saving mode icon in the notification bar disappears.