I had purchase Redmi 4 on 23rd May 2017. It has a very bad thing which is that it has only dula sim or one sim or one sd card you cannot use both at a time if you have to use 2 sim then you have to forget sd card or if you want to use sd card so you dont insert any other sim only one sim card is insert along with micro sd card it is very hopeless and huge data user today market it is a very bad thing to compromise space.