The Mi 3 always has no signal, sometimes it is good to restart, sometimes it is not good, and after

Hi! Try it out three times.

It's best to open the backup software that comes with your phone to back it up before clearing it to facilitate recovery.

Sanqing is to format the phone, which can solve most of the system problems, software flashbacks and other abnormalities, and Sanqing is also used to update the system before.

Clear the system data to ensure that the flashing can be carried out normally.

The method of entering the REC mode and clearing the three clears.

1. Open the system update software on your phone, menu key, and select to enter REC mode.

2, in the shutdown state (deduct the battery by yourself, Mi3 press and hold the power button for ten seconds to force it to shut down), press and hold the power button and the volume plus button together, and then light up the screen and let it go.

Then go to a page, Chinese Simplified.

english

3, The power button is the OK key, the volume up and down keys are selected, there are three options in the page, press the power button to OK, select Chinese Simplified.

4. Select Clear Data.

5. Select Clear Cache, and when the clearing is complete, select Clear Data again.

6. Select Clear User Data, and after the clearing is complete, select Clear Data again.

7. Select Erase All Data, and when the clearing is complete, select Restart the phone.

8. Select Enter the system with Recent.

9. After the phone is turned on, find it, back it up, turn it on, and restore all the data.

Re-brush the system, it's good, you can go to Xiaomi after-sales, or you can go to Xiaomi's official website to brush it yourself,

Xiaomi mobile phones often have no signal, good after booting, wait and then there is no signal, what's going on?

Hello dear, there is no signal or the signal is relatively poor, mainly because the signal will be affected by various factors such as terrain, landform, high-rise buildings and so on in the process of propagation, such as the current location is in a relatively closed place, the signal may be affected. 2. If the mobile phone signal of other China Unicom users is normal, you can troubleshoot the problem by using the following methods: [Method 1] Turn on the airplane mode and then turn off or restart the mobile phone to 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.

Mine is Redmi, get him, your situation is exactly the same as mine, so go to an open place and turn on the traffic data.

1. Dial * * Enter the hardware detection to see if the SIM card is working properly. If the SIM status is normal, go to step 3, or if the status is unknown, go to step 2.

2. Try to replace a different SIM card, if the status is still unknown during hardware testing, it is recommended to go to the maintenance 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).

3. Whether the network type is correct and whether the operator selects whether it is automatic. (China Unicom selects 3G priority, mobile selects only 2G, and China Telecom selects automatic).

4. Check whether there is a signal from other mobile phones on the same network nearby.

5. Back up the data, flash to the latest system version and try again.

6. Call the operator** (China Mobile 10086, China Unicom 10010) to check the network status 7.

It is not necessarily a mobile phone problem, it may be a problem with the network operator, such as the transmission tower is out of power, there will also be this phenomenon, it is recommended that you see if other people's mobile phones nearby have a signal.

I'm also using Mi3,His own signal is not good,If you're indoors,You try to change places,For example, if you're in your living room,You change to the window to try,If it still doesn't work,You turn off the phone and wait for a while before turning it on。

I used a Redmi and I had a problem just a few months after I bought it, and the Xiaomi phone is really bad.

The baseband may be missing, go to the Xiaomi forum to find related posts.

Xiaomi phones are sometimes like this, it may be a system problem, and it may be available in another place.

Maybe there is something wrong with the SIM card of the mobile phone.

Don't do it, mine is like this, you can't read it when you insert the card. There is no internet signal. The mobile network in the settings is grayed out and can't be clicked.

Sometimes it's because the network signal is poor, and it doesn't match the mobile phone.

Main Causes and Workarounds:

1. If there is a problem with the SIM card of the mobile phone, there is often no signal, and you need to go to the business hall of the card issuing operator to replace the card to solve it.

2. There is a problem with the SIM card slot of the mobile phone, which leads to poor contact between the SIM card and the mobile phone, so there is often no signal; This situation can only be solved by contacting the after-sales service for inspection and replacing the card slot.

3. There is often no signal due to problems in the mobile phone system, and it can generally be restored to normal after restarting; If this problem occurs frequently, you can try to restore the phone system to factory settings or upgrade to the latest version to solve the problem.

4. Problems with the hardware of the mobile phone will also lead to frequent failure of signal, such as the failure of the baseband, antenna, motherboard chip and other components of the mobile phone, which needs to be solved by contacting Xiaomi's official after-sales service for maintenance.

Please back up your data, enter recovery to clear all data (power off, press and hold volume on + power on to type recovery) (power off, press and hold volume on + power on key to enter recovery) to enter recovery to clear all data.

Sometimes a similar problem occurs when the phone is turned off.

If there's a problem with the card slot, go check it out.

Hello. Before switching the system, be sure to back up the data in advance, enter the recovery mode and then choose to switch after clearing the data, otherwise it may cause various flashbacks and no signal!

Solution: It is recommended to enter the recovery mode first (turn off and press and hold the volume on + power button) to switch to another system to try it, you can generally enter, and then back up the data after entering the system, and then, clear the data three times, the software re-**, it can be solved.

The method is: back up first and then shut down Press and hold the volume button on and the power button at the same time After entering, use the volume key to select, the power button to confirm, select Clear Data, Clear Cache'Clear all data, this is the three clear.

When restoring the backup, do not restore the settings and the software in the phone, only restore personal data such as contacts, text messages, and notes. The software goes to the Xiaomi App Store to re**. Try to see if it's normal!

ps:The way to enter recovery is to turn off the computer first and then press and hold the volume button plus the power button,After the number of flushes out, the touch screen is not sold out。 You must confirm with the volume key, select the power key, select Chinese Simplified Clear Data Select Clear Cache, Clear User Data, Clear All Data.

Then select Power Off, and then press and hold the power button to turn it on.

Note: The flash memory of Xiaomi mobile phone 4, Xiaomi mobile phone 3 Unicom version and telecom version adopts the new version of the solution, and all the memory of the mobile phone in the new solution will follow the user's use to intelligent pure partition, which can better save user memory. At the same time, all the data flashed by the mobile phone will be emptied when flashing,(Flash data contains,**,**,**,Game data packages and other data data,) to ensure stability,It is recommended that you use the computer to back up important data before flashing。