The Xiaomi Mi 2A has no signal 80, and the Xiaomi Mi 2A has no signal

Hi! It is recommended that you use a line brush to upgrade to the latest version of the development version, and do not obtain root privileges for the time being, and do not install system security software. Try to see if you can fix it. You can refer to the following flashing tutorial.

b.During this time, please back up your data, enter recovery (shut down, press and hold the volume on + power button to enter recovery) to clear cache, clear user data, clear all data,. The computer is equipped with a driver,** Miflash flash tool,This is the link to install the driver:

Mi-1 of the Mi-2 series.

c.When everything is ready, please follow the brushing tutorial on the official website to use the sixth type of line brush, which is the official flashing tutorial.

A more detailed description of the problem will help netizens understand the troubles you are encountering and help you solve the problem more accurately. Thank you for supporting Xiaomi phones!

Well, yes, my friend's 2A signal is not good, sometimes it's no service, you go to the official website to see if there is a solution.

Flash, the network format should be down. 、，

The reasons for the lack of signal are as follows;

1.The SIM card is damaged and the SIM card cannot be read resulting in no signal, 2The hardware failure of the mobile phone leads to the inability to read the SIM card resulting in no signal, 3

Software conflict resulting in inability to read the SIM card resulting in no signal, 4There is no signal coverage in this area, resulting in no signal.

Resolution; 1.Go to the business hall to make up for a new card to use, 2Go to a nearby mobile phone store or after-sales inspection and repair.

3.Delete the relevant software or restore the factory settings directly.

4.Change the place where the signal is good, and there will be a service signal.

I've been using Mi 2 for almost a month, and I don't feel as good as my colleague's i9100. And occasionally it freezes is real. It's not a beige, it's not a water army, I'm 32g.

It's a bit of a deal, I bought a bunch of accessories, and it cost nearly 3,000 yuan. Xiaomi's official distribution has no accessories, and you need to pay for it yourself.

I guess there's no signal where you're located.

Antenna problem, you can check the hand status in About If it's too low, try to change the antenna.

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 China Unicom 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.

Feedback, we will check and deal with it as soon as possible.

The Internet said that the back cover should be removed and isolated from the back cover with tape, can you try it?

Did you have a bank card or ID card inserted in your phone case? Take it out and you'll be fine.

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, 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.

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

If the above methods still do not help you solve the problem, please go to your nearest repair center for repair and inspection.