オリジナル投稿者： Brad ,
iPhone 4 stock from Apple has two sided adhesive at top and bottom of the iPhone front screen. When you remove the front screen this adhesive remains with the iPhone midframe. So you just install the new front screen and basically reuse the old adhesive. If your front glass is extremely shattered, you may want to remove either or both the top and bottom adhesive. In this case it is not necessary to install new adhesive, just go without. This is how most repairs are done, use what remains, or just go without the adhesive because it is not necessary.