Answer to: poor wifi no blutoothhmmmm... you got a 24k gold part on ebay. Have you tested the material density? There is a reason most jewelers don't use more the 18k gold; 24k gold is extremely soft and has almost no structural integrity. You can easily bend 22k gold with your bare hands.... So any metal screw you tried to put in that 24k gold part would have destroyed the gold threads almost instantly. Plus, using it as the main structural element of the phone means if you put a significant weight (i.e. a big book) on the phone the sides of the "bezel" should bend outward (probably just a little till something else inside starts to take the weight). I have a bridge you may be interested in... Beyond that, gold (or whatever random yellow material you have) will have totally different material properties (resistance, impedance, conductivity, etc) than the part you replaced. I'm kinda amazed you get any cell or wifi reception. You can double check all the internal connectors. Try conductivity tests to make sure the 3 parts of the case are no...
Answer to: iPhone 5s battery on iPhone 5I had the same thought (I am also having battery problems with my iPhone 5). However, after a quick look around the iFixit site it's clear that the iPhone 5S battery is not available for purchase anyway (as of Nov 30, 2013)! I'm just getting the iPhone5 battery. Even if we assume everything is perfectly compatible (which is a HUGE assumption that will probably blow up in our faces), the percentage change between the 5 and 5S batteries is only 8.33% ((1560-1440)/1440 = 0.08333). Normally, I expect to get ~16 hours of 'general usage' (my iPhone usually dies right before I plug it in at night). In theory, 8.33% would only bring you up to 17 hr 20 min; not exactly a difference what would justify the risky assumptions involved.