Home button issues after replacing back housing
Simply put , if you exchanged the back housing and the home button is now not working , the usual problem ( as explain by someone up top ) is the front now aligning with the dock connector . The typical problem is usually with the back housing replacement as the fit isn't 100% the same , if you noticed your phone probably feels tighter than before or maybe has the feeling like its bulkier or pushed out a bit at the top . Anyhow start by pulling up the front assembly and replacing it back down , if you notice the flex cable for the home button has a two piece connector that aligns with two metal parts on the dock connector , these must be aligned and touching properly . If that still doesn't fix your problem then go back to the dock connector , a lot of people just throw these in there and force the fit , you should not do that , there is a certain way they should be placed and for knowledge always make sure the metal parts ( where screws insert ) from the dock connector are above the metal parts on the bezel , ive seen people put them under , that is incorrect . THey should never feel forced ( the parts installed ) There should always be a good fit feel when you do it .
As far as bezel , the other guy is correct , super glue works fine or if you don't have you can use adhesive strips on the sides and corners , however i recommend super glue out of the two , when you use adhesive you will typically get a raising part , and also when you use super glue , id recommend to put it on its front and sit something heavy on the back for a bit and let it dry for a few , if it still raises a bit , this should be fixed once you install all of the parts .