It is possible that a building which has newly been built is blocking the signal, in which case there is no much that can be done. The only option is that you use the connection in another part of the house or go for another broadband connection.
I would like to use Skype on my mobile phone and require a new mobile phone. I do not know what all phones are capable of using which applications and whether some phones allow you to download any applications. So please suggest me a mobile phone which supports Skype calling.