To make a long story short, the device is sent back due to the mentioned in previous posts wireless connection problem. I have a Fritzbox 7112 to wireless 802.11 b / g, the purchased mobile phone was supposed to support the data sheet allegedly wireless standard b / g / n, which is clearly not always does with any router (see 1. Hit the guggeln after "WLAN Authentication Error 6310"). The support of Samsung said tersely, the problem is known and should I use a new router. Does it get ?? I buy no entry-level phone, then my router expensive upgrade, and yes my router with various other tablets / smartphones (incl. Eifon 5) how any works without a murmur. Ergo, who is buying the phone should be aware, which may be an annoying gambling the wireless connection.