Smartphone Upgrade Days Sale is going on at Amazon. The sale has started on January 21, and it will run till January 31. Up to 40% discount is being given on smartphones in the cell. Under the best deal in the sale, Redmi 10 Power can be bought at a very low price. It is written on the banner that such an offer has come for the first time for 8 GB RAM phones. The phone can be bought for Rs 11,999. But the special thing is that under the exchange offer, a discount of Rs 11,300 is being given on it.