Boosting a paid public wifi

[misterblack19]

Ive come to work in germany for a few months, and I've bought a vodaphone internet package for 30 euro that i use in my apartman. Its quite a distance from me, and the signal is ok in my bathroom and living room, however in my bedroom it's just not cutting it. I was wondering if there was a way to boost the signal somehow or to redirect it. I can't use routers as its not a wired network(obviously), but maybe some sort of antenna to mealy redirect the signal? Any suggestions?

 

[popatim]

Can you place it somewhere more central in the house?