I took such a device as a gift, but it turned out to be the SM-A336E / DSN model. So, this is a model for Asia / Africa! And she can't change the region to SER and turn on SP with Mir cards! I wish YM would force sellers to specify the exact model of the device being fed in order to avoid similar misunderstandings in the future! Changing the region to SER is only possible in model B, not in E.