The first impression was really positive: small and handy. But that's it. The manual is insufficient. Inside glued two small round sticker on the contact parts ...!?!. I had several SIM cards (new!) Try before one worked. And when the finally worked and I started a video recording, the sound quality was extremely poor. Not to mention you still heard of the annoying whistling the addition in the background ... I was expecting more, especially at the price. Quality looks to me otherwise