WIFI Issue on BB OS 7

Hello Guys,

i buy a Bold 9790. Just for fun. I love this device for my second mobile number.

I know i have no BIS but with Telekom it works good. SMS and Phone Calls works perfectly.

But i have a WLAN Issue. Everytime when i connect to the internet (Oper Mini, BB Browser, BBW, or any app with an TCP IP Connect) the Wireless Signal lost. After 3-4 Seconds they connect again and everything works.

Have anyone this issue, too ?

I don't know how to fix it. Youtube Video Link attached :D

Link: https://www.youtube.com/watch?v=NnJqir_E92s

https://www.youtube.com/watch?v=NnJqir_E92s

THX