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Bugs and Issues

How to solve common mobile network issue on your Huawei smartphone



Since their invention, there is one common task that every smartphone can perform is to make calls feature using a capability called mobile network. The network on mobile has evolved with time and currently connects to the fifth-gen network or 5G.

Just like any other phone, Huawei phones can also run into a number of network-related issues. The mobile network issue is one of the major problems, it happens when the connection disrupts between SIM card and smartphone. It results in you are not able to receive or make calls, or the 4G network cannot be found on your device.

Below you can check the issues along with their solution to your mobile network issue that you are experiencing on your Huawei device.

Mobile Network Issue 1: No SIM card found


In this, your smartphone isn’t able to recognize the SIM card that you have inserted into your device.


  • Takeout the SIM and clear off the dirt on the surface of your SIM card and SIM tray.
  • Test your SIM Card on another device to see whether it is damaged. If it does not work on the other device either, please replace your SIM card at your carrier’s retail store.
  • If your SIM card can be recognized on another phone, the issue may be coming from your device. In this case, please back up your data and request the Postal Repair Service on the official Huawei Support website or the Support App for a repair.


  • Please always use standard SIM cards and do not attempt to cut them out on your own, as this may cause poor connection due to nonstandard shapes.
  • SIM cards can be damaged by frequently removing them or using them in humid or strong magnetic environments.

Mobile Network Issue 2: Unstable signals

An unstable phone signal might be caused by metal or magnetic materials interruptions or enclosed environments. If you are facing an unstable signal problem, please follow the following step:

  • Remove any magnetic holder, or magnetic or metal cases that you may be using for your phone.
  • If you are inside a building with a poor signal, please go outdoors or move until you find a better signal.

Mobile Network Issue 3: No 4G signals found

If your 4G signal might be disabled or lost under certain circumstances. Check out the below instructions to resolve this issue.

  • Swipe down from the top of the screen to open the notification panel
  • Press and hold the Mobile Data icon to enter the settings interface
  • Turn on 4G network.

Note: If there is no relevant option, it means 4G is turned on by default.

Also, try this:

  • Restart your phone or switch on and off the Airplane mode
  • Enable 4G again.

Note: If other phones using the same carrier in the same area have similar issues, it probably means that the local 4G network signal is generally weak and unstable.

Additionally, if you are fronting any other network problem, please try the methods listed below to get over the issue and enjoy the smooth and speedy connection.

1. Check and reset APN Settings

  • Open Settings and search for APN
  • Tap Access Point Names (APNs) to enter the Mobile data interface
  • Select Access Point Names (APNs)
  • Touch on the upper right corner and Reset to default.

2. Reset Network Settings

If the APN reset did not work, try resetting your network settings.

  • Open Settings and search for Reset network settings
  • Tap on Reset network settings to rest it.

Notes: Resetting network settings will delete WLAN and Bluetooth connection records and requires the lock screen password for authentication.

3. Get official support

Find the root cause of the problem with Support App’s Smart Diagnosis feature. To do this:

  • Open the Support App
  • Click on Troubleshooting and start

Alternatively, get in touch with Huawei through Live Chat on the Support App or the official Huawei Support website.

(Via – Huawei)


Amy is our firmware and software specialist, she keeps her eagle eyes open for new software rollouts, beta programs, and other software related activities as well as new smartphone launch.

Bugs and Issues

An advance cryptomining malware could be a threat to Huawei Cloud



Huawei Cloud

An advanced version of crypto-mining malware has been found lately that could be a serious threat to Huawei Cloud and users. This malware was previously reported attacking the open-source software development platform- Docker Containers.

As per the report, this new malware version has enough algorithms to dodge the firewall rules creation function. Adding to this, it leaves a network scanner behind to track API-relevant ports of the other hosts.

However, this new crypto-mining malware is currently active in cloud environments. Furthermore, it’s checking for the other ecosystem that has previously been affected by this attack.

Before discussing its other details, let’s first know what crypto-mining is-


What is Crypto-mining :

Crypto-mining or Cryptojacking is defined as an online thread or malware that holds the ability to hamper and even crash an organization’s digital environment. In addition, it worked while staying completely hidden from a user.

In Cryptojacking, the attacker can use the victim’s devices without their concerns to secretly mine cryptocurrency. Likewise, it also causes financial losses for the victim and disruption to business workings. Moreover, it mainly targets cryptocurrencies or digital money.

On a Linux system, this digital currency miner malware has to follow a procedure shown in the figure. It not only harms the system but simultaneously removes its traces.

 Huawei Cloud crypto mining malware

Afterward, it replaces all users added by the other actors with the one created by them. It’s one of the basic steps follows by the cloud-targeting cryptojackers. Unlike other attackers, the cryptojackers use the Sudo programs in their accounts that provide root access to the system.


Furthermore, the attacker uses their own sh-RSA key to perform system adjustments and change the file permissions to a locked state. It restricts other users to get entire control of the vulnerable computer or device even if they gain access to the device.

 Huawei Cloud malware

Besides, the actors install the Tor proxy service that helps them in preventing from establishing a connection to other network scanning detection. For wrapping, there are binaries codes (linux64_shell,, fczyo, xlinux) at UPX packer. Once the attack get complete control of the device, it began to execute its malicious activities.

 Huawei Cloud malware

However, there are some known vulnerabilities detected during the scan in this attack. Most of them are related to the weak password in some functions that includes

Some Known Vulnerabilities:

  1. SSH weak passwords
  2. Vulnerability in the Oracle WebLogic Server product of Oracle Fusion
  3. Middleware (CVE-2020-14882)
  4. Redis unauthorized access or weak passwords
  5. PostgreSQL unauthorized access or weak password
  6. SQLServer weak password
  7. MongoDB unauthorized access or weak password
  8. File transfer protocol (FTP) weak password

As you can see, what users can if on Huawei Cloud if this coin-mining malware has been surfed in actual. To be mention, all the describe info came from the leading data security and cybersecurity solution provider TrendMicro.

According to this firm, it has sent the acknowledgment report to Huawei Cloud to make the authorities aware of the crypto-mining malware. Now, we are waiting for Huawei to officially address this problem.


(Via- BleepingComputer)

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Bugs and Issues

HarmonyOS October security update resolves input verification issue



Huawei has released the October security 2021 patch that soon rollout for eligible smartphones and tablets running on HarmonyOS. This monthly update fixes several known issues and vulnerabilities to resolve the improper behavior of the devices.

While exploring the patch details, we have come to know about a serious issue that can cause injection attacks, memory leakage, and compromised application. However, the HarmonyOS October 2021 security release note will fix this issue in the affected devices. You can check the basic details below-

  • Affected Sector: Applications
  • CVE: CVE-2021-37116
  • Description: It’s an input verification vulnerability
  • Impact: Successful exploitation of this vulnerability may affect the data confidentiality and product availability

HarmonyOS input verification issue

The input verification issue with high severity is only affecting the devices working on HarmonyOS 2.0 system. The device infected will this issue, accepts improper data or information while receiving data from an external party especially from untrusted sources.

An attacker can intentionally send malicious input into the system. Meanwhile, the affected devices aren’t able to verify the authenticity of the data and take it. It causes an application to carry out some unplanned action such as data leakage or confidential information exposers.


Moreover, the attackers relay malicious code through an application to another system that accepts it due to holes in input verification algorithms. Luckily, as the latest HarmonyOS security patch will be released for the devices, this input verification issue will be fixed.

Besides, the security update also acknowledged 2 medium levels of CVE in the framework, 2 high and 4 medium levels CVEs in the kernel, and 1 high and 5 medium to low-level system threats. In addition, 2 critical, 3 high and 6 medium levels security threats fix in the HarmonyOS 2.0 applications.

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Bugs and Issues

Huawei fixed a dangerous Bluetooth bug in September 2021 update



Huawei Bluetooth Bug

With the release of the September 2021 Security Patch details, Huawei highlights the bugs and their fixes for the Huawei and Honor devices. It’ll fix various issues in the system alongside a Bluetooth bug that could harm a user in several ways.

The latest security patch includes a medium-level bug fix identity as CVE-2021-37039 on the smartphones running on EMUI 11.0.0, EMUI 10.1.1, Magic UI 4.0.0, Magic UI 3.1.1 Android skins. Once an attacker successfully exploits cross this Bluetooth bug, it may cause a serious Bluetooth DoS.

What is Bluetooth DoS:

The Bluetooth system in any device can be the mean of DoS (Denial of service) attracts and cloud seriously harm the victim. In BT DoS, the attacker or hacker frequently requests to pair the target’s Bluetooth device with his in order to access the personal info of the soon-to-be victim.

However, Huawei has timely recognized this flaw and release the patch fix. Once it reaches the device holders, they will get input verification notice before their device is paired with the other. It’ll help them to avoid intruders.



In simple words, when someone wants to establish a BT connection with users, the device will ask for the owner’s permission before connecting the other device. If the second user is a known person, you can accept the request and can grant the permission. Furthermore, you can also deny it, if you don’t know the origin of the second device.

Know More: Monthly and Quarterly: September 2021 Huawei EMUI Devices (New and Old)

Although Huawei has released the patch details, the company hasn’t started the rollout process. It’s still releasing the June and July security patches not to talk about the August security release. Until the patch is available to the users, they can try to avoid enabling their BT, while not in use.

That’s all for now, Stay connected with us for more updates about Huawei.

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