I wouldn't bother personally, get a new phone.
Went through this with an old 5S and used - allegedly - a genuine Apple screen/microphone/home button assembly costing about 100 quid. Fitting it was fiddly, but easy if you take your time. And then the problems began. Poor voice call quality, home button behaved erratically, screen contrast was awful compared to original and the front camera didn't work. Utter waste of time and money.