Home Signal can help enhance your indoor signal. You may be eligible to get a Home Signal box if you have trouble connecting to the network indoors, you live in a rural area or if your house has thick walls that block your signal.
www.three.co.uk/homesignal
This is great news for me as for the last year signal in my home has been so poor, to an extent that i get no signal at all im some areas in my home. Apparently these are only available to customers through 2nd line support, some customers may not be eligible and if you're on a sim only contract you cant get one of these yet.
They also have a how to video:
http://www.youtube.com/watch?feature...&v=DK6f2c2KEV0