Your post title was about 'Flipkart' cheating customers by selling non-working products. It is NOKIA who made the faulty devices. Believe me, even Nokia would not like to make bad products/devices like the one sold. It is them who should take care of the phone when customer complaints.
Nice to see the power of Social Media.
I had bad experience from
Shopclues - Purchased more than 50-60 items. Had problem once or twice
Tradus - Purchased 50-60 items. Had problems many times.
Homeshop18- More than 75 items (from clothes to laptops) - Had problems few times
Ebay - Bought 50Rs item to a lakh worth items (more than 100s with two ids)- Had problems too.
Pepperfry - Less than 20 items. Had problems.
Flipkart - N number of items. Had problems few times.
Snapdeal - 30-40 items. Had problems many times.
Fetise - Bought 1. Problem with that itself.
Groupon - Bought 20+ , got problems couple of times.
futurebazaar (bigbazar) - Bought twice. Faced problem both times.
Not faced problem so far
Grabmore (India) - Bought twice.
Medplus -Bought twice
Amazon - Bought twice
Indiatimes - Bought two - three , never had problem (you read the worst reviews for this particular site)
Yebhi - Bought 20 times or more . Never had any glitch. The best so far for me.
Rediff - Bought twice. No problems (Another hopeless site by most of the regular shopping people)
I have left few shopping sites where i have purchased. These are the names I remember now.
I might have forgotten few sites for sure (remembered few more while typing and added).
In the above list, few are blacklisted as per my experience. I will never visit fetise.com whose MD is following everyone in twitter. I have taken a break from Tradus as per pathetic customer support (will visit and check it later). I had to tweet to Munde (CEO) to get it noticed. They gave some 300 Gift voucher as a compliment which I wont use it. They think customers easily get everything forgotten if they give some thing free (even 50rs).
Flipkart easily resolved my case. Will visit there again.
HS18. They do not respond to mail. Once you tweet to them, they take care immediately and solve it. (if it is above 10k, you have some one assigned to you).
Ebay - Big purchases came without any surprises. Small purchases had surprises (duplicate items etc). When it is less than 200Rs, I sometimes do not even care writing endless mails. Once I had escalated and solved to my satisfaction.
Shopclues - Tweet works. Email hardly works.
Snapdeal - They were ready to help and i was lazy to send products back. They refund more than replace.
Pepperfry - Tweet works. Got refunded without much fuss. Online shopping - Use wisely.
Clothing - Go for brand products than unknown brands which gives surprises.
Electronics - Make sure you get a box piece which is not opened.
Big items (TVs, Washing machines) - Go to a local dealer and see the product. If the difference is not much, buy it from local dealer. (Mostly big items are send from that city itself)
Most importantly, check for the TAX paid bill which can be used for warranty.
Remaining - your luck