I work with one of the largest iOS device repair companies in the world, iCracked. Check out their website at iCracked.com. I am certified as an iTech with iCracked, held accountable to their high quality repair standards, and have access to their high quality replacement parts. All new parts come with a lifetime national warranty on manufacture defects. That means if the part we installed on your device goes bad during normal wear and tear (accidental damage excluded) we replace it for free for as long as you have the device in one of our over 400 locations around the US and in several international locations as well. I also guarantee my work in that if a function is working during pre-check before the repair and it stops working after the repair I will take financial responsibility for the damage by either replacing the damaged part or if necessary replacing the device with one of equal or greater value.