The Mi 3 shows no service 5 and the Mi 3 shows no service

Xiaomi mobile phone shows no service, it is recommended to check it as follows:

Whether the SIM card is inserted correctly.

Whether the wrong SIM card is inserted, such as the standard version inserts the telecom SIM card, etc.

Go to Hardware Detection to see if the SIM card is working properly (enter * * on the dial screen). If the SIM status is normal, go to step 5, or if the status is unknown, go to step 4.

Try to replace a different SIM card, if the status is still unknown during hardware testing, it is recommended to go to the repair point for testing; If the detection status is normal, it is recommended to go to the carrier to replace a SIM card (the SIM card may be aging).

Whether the network type is correct and whether the carrier selects Automatic. (China Unicom selects 3G priority, China Mobile selects only 2G, and China Telecom selects automatic).

If the network type of the non-telecom mobile phone is CDMA automatic, you need to change the network type to "WCDMA Preferred" in the mobile phone information (**) to solve the problem.

Whether there is no signal in the area. You need to check whether other mobile phones on the same network have signals.

Restore the factory settings to see, if it doesn't work, then go to the after-sales service.

Reason: The mobile phone has a procedural error, resulting in abnormal access to the Xiaomi network function, and it is recommended to double clear the mobile phone to restore the network function.

Workaround: <>

2.Select Reboot to Recovery Mode;

3.Moving up and down is controlled by the volume button, while selection is determined by the power button, that is, the power button;

4.Click Chinese Simplified with the power button;

5.Click Clear Data, which contains Empty Cache, User Data, Virtual SD Card, all select and clear to complete double clearing, and the network function can be restored to normal.

The phone does not recognize the SIM card and shows no service processing method:

1. Please confirm whether the SIM card type is correct according to the mobile phone model. An incorrect SIM card can damage the card tray and card slot or even fail to be removed;

2. Please make sure to use a standard SIM card. Do not use a non-standard SIM card or cut the card by yourself, cutting the card can easily cause the SIM card to be unable to recognize or damage the mobile phone, it is recommended to go to the business hall to change the original standard SIM card;

3. Please confirm whether the card is placed correctly. Whether the notch of the SIM card corresponds to the card slot;

4. Please confirm whether the surface of the SIM card is dirty. If the SIM card has been used for a long time, you can wipe the surface of the chip with alcohol, or go to the business office to replace the original standard SIM card. If the SIM card is used for a long time, the metal surface is easy to be oxidized, which is easy to cause probabilistic card recognition;

5. Do not plug or unplug the SIM card when the device is turned on. After inserting the SIM card, please restart your phone and try;

6. If the problem still exists, please back up the data in advance and bring the purchase invoice to the after-sales service point for maintenance.

Xiaomi Mi 3 mobile phone shows no service, it is recommended to check as follows:

No, the SIM card is inserted.

No, insert the wrong SIM card, insert the telecom SIM card in the standard version, etc.

Go to Hardware Detection to see if the SIM card is working (enter * * on the dial-up page), go to step 5 if the SIM status is unknown, and go to step 4 if the status is unknown.

Try to replace the SIM card, if the hardware detection status is still unknown, it is recommended to go to the repair point for testing; If the detection status is detected, it is recommended to go to the operator to replace the SIM card (SIM card can be converted).

The network type is not confirmed by the operator's choice (China Unicom selects 3G first, migrates only 2G, and China Telecom selects from).

If it is not the telecom mobile phone network type, CDMA, you need to change the mobile phone information (**) network type to WCDMA preferred, that is, solve the problem.

Whether there is a signal in the area needs to check whether the mobile phone on the same network has a signal.

The backup data cable refreshes the system version and tries again.

Please go to a nearby repair point for repair inspection.

Mine is in this situation too, just brush the machine yourself.

Restart your phone, which often happens.

The phone does not support 4G or there is a problem with the SIM card.

If there is no signal on the phone, it may be a signal problem, or it may be a problem with the phone card, or it may be a problem with the phone system.

If the phone has no signal, no service, and does not read the SIM card, it is recommended to test it according to the following methods:

1.You can first open the phone's settings - about the phone, check whether the baseband version, IMEI, and serial number are unknown, if you find it unknown, it is recommended to send it for repair;

2.Go to "Settings--Network--Network Mode" and check whether the 2G 3G 4G setting mode matches the type of SIM card used;

3.Go to "Settings - Network - Network Operator", check Automatic, observe whether the service is restored, if there is no service recovery, restart to observe whether it is restored; If you recover after restarting, it may be caused by "baseband and firmware", and you can flash the firmware and baseband maintenance again.

4.Turn off the phone, pull out the SIM card slot, confirm whether the SIM card contact points are damaged or dirty, wipe it clean with a clean cotton cloth and insert the phone again to confirm whether it is restored;

5.Replace SIM card test.

Note: If the fault persists, it is recommended to send it for repair.

Please ask which version of your phone is and which carrier's network you are using.

1. If it is not the reason for the poor signal of the environment you are in, please open the settings Mobile Network Network Type Selection Choose to use only 2G network and try to see if it is normal.

2, if it doesn't work, remove the SIM card, reinstall it again, try to see if it's normal, 3, still doesn't work, it is recommended that you change the SIM card to try it.

4. If it still doesn't work, please take your mobile phone to a Xiaomi authorized repair point near you or Xiaomi Home for testing.

Authorized repair outlets address and ** inquiry.

Mi Home address and ** query.

Mi Home is open from Tuesday to Sunday, from 10 a.m. to 6 p.m.

**The after-sales principle of Xiaomi mobile phones and Redmi mobile phones and Xiaomi tablets is the failure of non-human damage: return within seven days, replacement within fifteen days, and within the one-year warranty period, non-human damage is completely free.

I hope the above reply can be helpful to you.

Hello, it is recommended to change to a 4G card or change someone else's card to see.

First of all, are cell phones good?

Secondly Are cards good? Is it the same as the manual mechanism?

If it's all right, it may be that the contact is not good, and there are other reasons.