Hi Baryans,
Thanks for using the Apple Support Communities. If you have questions about repair service from Apple, including post-repair coverage, you may find the following page helpful:
After service
When you get your iPhone back from service, it might have a new operating system. If your iPhone uses a SIM card, put it in. Turn on your iPhone and follow the steps you see on the screen. When you finish the setup, restore your data from your backup.
We guarantee our service, including replacement parts, for 90 days or the remaining term of your Apple warranty or AppleCare+ coverage, whichever is longer. This is in addition to rights provided by consumer law. We offer this whenever you get service from us or from an Apple Authorized Service Provider.