You can get the .apk setup package of Мой МТС 4.5.1 free of charge and have a look at users' reviews on Droid Informer. This file size doesn't exceed 63 MB and the app can be launched flawlessly on Android 4.1 and above. According to the antivirus report, this application doesn't contain viruses or any kind of malware. Мой МТС has been originally developed by MTS PJSC and it relates to the Tools category.
The developer released a new version of the app on Oct 17, 2020 and over 10M users downloaded and set up this application. Google Play shows that Мой МТС is rated 4.5 by its users. The app has ads.
Samsung and Huawei users install this application quite often.