When we order something from flipkart it shows the expected delievry date, different delievery speeds available, and accordingly as a per our choice they dispatch the product. I have ordered so many times from flipkart, and every time they completed the promise. once I ordered laptop battery which had a discount of 15%. the final price was 1300. they sent the battery but it didnt suited to my laptop at that situation they immidiately picked up the product and replaced it with new one. there was no delay of more than a day. flipkart has a website and mobile app which both works smooth. the mobile app has more offers often. you can surely believe on the website.