I have a Samsung 3G Network Extender. It has worked great for about 2 years. A few weeks ago it started having problems. About half the incoming and half the outgoing calls are dead lines. Outgoing does not ring on my end, but whomever I am calling is getting the call. Our link is dead, like putting a book up to your ear. Nothing. Incoming calls are about half dead the same way. All lights are blue, everything is in the same place as before, and I can stand 2 feet away from it and it acts the same.