If you installed a new iOS 13, including new iOS 13.3, on your iPhone or iPad, you could already see that the new iOS 13 is the most buggy and unstable iOS in the history of Apple.
Web already has a large number of requests how to Downgrade from iOS 13 to iOS 12.

Personally, I am very happy that I did not install this update on my main iPhone, so my iPhone runs on a stable iOS 12. I do not understand Apple, which not only produces such buggy versions of the OS, but does not give the opportunity to return to the last generation of iOS.

Instead of allowing the owners of iPhones and iPads to choose between the iOS, the Apple adheres to its old technology and forbids returning to a stable iOS 12. The

How to Downgrade iOS 13 to iOS 12: 

We know that this is not possible, but a large number of fake sites offer this service. Owners of iPhones who do not know about this unspoken rule, download such utilities and install them on their devices. But, unfortunately, such utilities do not give the opportunity to go back from iOS 13 to iOS 12, but only steal data from users or install their software to discreetly control the smartphone.

The person who downloads such a utility enters the password when installing the certificate, then notices that nothing happens and leaves the certificate on his iPhone.  Since most do not know where to look, such attackers quietly steal all the information from the owners.

Unfortunately, Apple does nothing and millions of iPhone owners can not use their devices without bugs and errors.

If you are one of those who are looking for an opportunity to return from iOS 13 to iOS 12, we once again tell you – this can not be done. After installing any version of OS 13, including the newest iOS 13.3, you cannot downgrade to the previous version. You can only go back to the previous version of iOS 13.

This means that ALL the sites that offer you to downgrade from iOS13 to iOS 12 are fake and offer you fake utilities. Do not pay, do not download, do not install. What to do? We can only wait for Apple to release a stable iOS.