Follow up my previous comment. WEP410 is a piece of junk. Drop calls while the cell phone still has full signal strength. So much troubles that I decide not to use it any longer. Could be that I got a defective one but I can't return to the seller after 14 days.Since I posted my first comments on the product, I've got calls from the seller trying to resolve the problem for me. They promised to send me the shipping label and instructions,via my email, for sending the wep410 to them and exchange for a new one in exchange for removing the comment that I posted on the review. But after a few calls from the seller customer service person and a call from me, I still don't receive any email at all. I even try to send him an email with the email address that printed on the shipping bill (customerservice@datavis.com), I got a return email because the address is invalid. Since then I decided not to contact them any more. I just have to take the loss. Don't want to wait time to resolve this any more. By the way, I did not remove my comments yet because I haven't received any email as promised.My advice is be sure that you get your problem/issue take care first.