How to Repair IMEI of Samsung Galaxy Ace 4 SM-G357FZ with Cert File
If you have a Samsung Galaxy Ace 4 SM-G357FZ with an invalid or null IMEI, you may not be able to use your phone properly. You may face problems like network issues, no service, or invalid SIM card. To fix this, you need to write a valid Cert file to your phone using a professional tool like Samsung Tool PRO.

G357fz Cert
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A Cert file is a file that contains the IMEI and other security data of a Samsung phone. It is unique for each phone and can be used to restore the original IMEI if it is corrupted or changed. However, not all Cert files are compatible with all phones. You need to find a Cert file that matches your phone's model and key ID.

In this article, we will show you how to repair IMEI of Samsung Galaxy Ace 4 SM-G357FZ with Cert file using Samsung Tool PRO. This is a paid tool that requires a box or dongle to work. You also need to have a compatible Cert file for your phone. You can check the Cert files compatibility here.

Steps to Repair IMEI of Samsung Galaxy Ace 4 SM-G357FZ with Cert File

Download and install Samsung Tool PRO on your computer.
Connect your phone to your computer via USB cable and enable USB debugging on your phone.
Launch Samsung Tool PRO and select SM-G357FZ as the model.
Click on the "Backup" tab and then click on "Read CERT". This will read the current Cert file from your phone and save it on your computer as a backup..
Click on the "Unlock" tab and then click on "Write CERT". This will open a window where you can browse and select the new Cert file that you want to write to your phone.
Make sure that the key ID of the new Cert file matches the key ID of your phone. You can check the key ID of your phone by clicking on "Read Info" on the "Backup" tab.
After selecting the new Cert file, click on "Write". This will write the new Cert file to your phone and repair the IMEI.
Wait for the process to finish and then reboot your phone.
Check if your IMEI is restored by dialing *#06# on your phone.

Conclusion
By following these steps, you can repair IMEI of Samsung Galaxy Ace 4 SM-G357FZ with Cert file using Samsung Tool PRO. This is a simple and effective method that can solve many problems related to IMEI. However, you need to be careful when choosing and writing Cert files, as they can also damage your phone if they are not compatible or corrupted. Always make a backup of your original Cert file before writing a new one.

FAQs
Here are some frequently asked questions and answers about repairing IMEI of Samsung Galaxy Ace 4 SM-G357FZ with Cert file.

What is IMEI and why is it important?
IMEI stands for International Mobile Equipment Identity. It is a 15-digit number that uniquely identifies your phone and its network. It is used by your carrier to provide you with network services and prevent fraud. If your IMEI is invalid or null, you may not be able to make or receive calls, send or receive messages, or access the internet on your phone.

What causes IMEI to become invalid or null?
There are many possible causes for IMEI to become invalid or null. Some of them are:

Flashing a wrong or corrupted firmware on your phone.
Rooting your phone or installing a custom ROM.
Changing the SIM card or network provider.
Hardware damage or malfunction.

How can I check my IMEI?
You can check your IMEI by dialing *#06# on your phone. You can also find it on the back of your phone, under the battery, or on the box of your phone..

Is it legal to repair IMEI?
It depends on the laws and regulations of your country. In some countries, it is illegal to change or repair IMEI without the permission of the original manufacturer or network provider. In other countries, it is legal to repair IMEI if it is done for legitimate reasons and not for fraud or theft. You should always check the laws and regulations of your country before repairing IMEI.

Is it safe to repair IMEI with Cert file?
It is safe to repair IMEI with Cert file if you use a professional tool like Samsung Tool PRO and a compatible Cert file for your phone. However, you should always make a backup of your original Cert file before writing a new one. You should also avoid using Cert files that are shared online or from unknown sources, as they may be blacklisted, duplicated, or corrupted.
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