UMei Technology Co., Ltd reviews

I purchased some microSD cards from umeiusb.com. My first order was for 100 cards, and the second for 1000 cards. I\'ve attached both invoices for reference. My first problem arrose when I started selling the original 4GB cards. I started getting returns from customers saying that the cards were no good. I had originally tested each card before sending to my customer, basically ensuring that it would store data. However, after I started getting returns I did some more testing. The cards say 4GB on the silk-screen on the outside, and when you look at the properties of the card in windows, it shows 4GB capacity. However, once you store more than 114MG of data on one, it starts losing data and is corrupt. I then tried to format a new card to 4GB, and it always fails. So, these cards seem to be fake (or defective). However, before I started getting returns, my sales were going so good, and my original testing was good, that I ordered 1000 more cards. These cards were already shipped to me, but not yet received when I started getting the original comlaints. When I got the second order, they were 2GB cards (silk-screened on the outside) instead of 4GB like I ordered. They also did not include the adapter and plastic case as outlined in the invoice. I\'ve contacted the manufacturer my email many times, but have no response at all from them. I\'ve tried to call, at all times of day, both daytime here in the US, and daytime there in China, and they never answer the phone.