1 - 2 hours
My Iphone 5s developed a microphone issue after a few months of use. I couldn't be heard when making a phone call unless I used my speakerphone. I tried dealing with my cellphone carrier on a repair or replacement as it was under warranty. They sent me a "like new" replacement however this "new" phone had more problems then my original. They said they had to work out the replacement phone issues with Apple Care next, otherwise there is nothing else they can do for me. To make a long story short, I told them to pound sand and returned the replacement phone and switched back to my iPhone 4s for the time being. One day I decided I really want to get back to my 5s so I looked into repairing it and found this website.
The repair went pretty well. The step by step guide was a big help, wouldn't have tried it without it. The guide was missing a couple steps at the end of the tear down however. There are two more parts that need to be removed from the original lightning connector and headphone jack assembly. There is a small bracket that the home button connection is glued to that has to be removed and installed on the replacement, and the microphone has a small rubber boot around it that has to removed and installed over the replacement microphone. Likely through my research another reviewer point this out so I didn't miss it. Otherwise the repair went just fine with the guide. I was a little mad that the required flat headed screwdriver was mentioned in the guide but not included in the required tools list. I was able to make a screwdriver I had work but I would have liked to have the right size for the job. The only mistakes I had were I got a connector that was next to the battery stuck under the logic board when I was reassembling and didn't notice until I had the board all screwed down. So I had to removed the logic board twice but likely there was no damage. I also had a hard time getting the home button reconnected as the small amount of adhesive wouldn't stick after being removed from the original connector. And I couldn't for the life of me get the securing clip for the home button connection to hook on to the metal hooks on the backside of the connector. I could only snap it in the front which with a little pull pops it out. I spent a good hour trying to hook this clip and ended up just snapping it in the front and putting the phone back together. Not too worried as everything is pretty tight in the phone and its not coming apart again unless something else dies. Overall, I'm glad I decided to purchased the parts and tools and make the repair. Phone is working just like new now.
My advice would to purchase all the required tools mentioned in the guide including the flat head screwdriver (2.5mm?). The screws are UNBELIEVABLY small and need these designed magnetic screwdrivers to make it work. Also you will be wise to lay out the steps requiring removal of parts and screws on a piece of paper with some clear or white tape to stick the small parts to so you don't lose them during the repair. Also helps you lay out the screws in order so you don't mix them up when it comes time to reassemble. The website sells a magnetic white board for this purchase if you are only doing the one repair then so some paper and tape work just fine. Also I would advise to just take your time and don't force anything. It took me probably 5 hours from start to finish with 1 hour wasted with trying to hook that clip securing the home button connection. The only thing I wished I had known before I did the repair was about needing the flat head screwdriver, partly my fault as it was mentioned in the guide but wasn't in the tools list so I didn't purchase it, next time I will buy it.
iPhone 5s Lightning Connector and Headphone Jack
Phillips #000 Screwdriver
P2 Pentalobe Screwdriver iPhone
iFixit Opening Tool