Little backstory: I have a fairly old Macbook from late 2006 which is starting to wear out. At the moment I really don't have the energy or the funds needed to upgrade it. One of the issues it has is a constantly dropping wifi signal, which I have diagnosed as a problem with the antenna (the left hinge is broken so that would make sense). Here's the deal. I can get perfect internet coverage but only if I'm literally sitting right beside my router. Consequently, if I use my iPhone as a personal hotspot I get a perfect internet connection. Obviously when you do this, you're paying through the nose for 3G internet, particularly if you have to stream anything (I'm a music producer so I transfer huge files over the internet quite often). So what I'm wondering is, if I jailbreak my 4S, is there any way I could use it as a wifi booster / repeater? In other words, connect the iphone to the wifi router, which can be in any part of the house, and then keep the iphone beside the macbook and connect to that wifi through the iphone? Any jailbreak programs which allow this? I know this isn't a long term solution, but this fault has developed at a time when I'm incredibly busy and really can't afford to have a dodgy internet connection, so this would help me out until I have time to actually go and get the antenna repaired. Anything?