I have used this mi store application for buying mobiles mi 4 mobile that mobile not able to buy using amazon application in only in seconds it is showing out of stock in amazon .but I have used this mi store and I have purchased two red mi 4 mobiles at a time one for me and another for my friend . Both mobiles are working well. There customer service I best from there side. Product quality is too best and it’s design also good.a bout there delivery time is late they take five days to delivers the mobiles. Application and site both are good and easy to use it’s reliability If any won want to buy any red mi mobile then use this mi store or mi.com both are working best .