Hello,
Sorry to hear you were experiencing these problems. Try resolving your issues with these steps:
(These steps applies to iOS 8)
Before doing these steps, it's recommended that you BACK UP your phone. Please refer to here for a tutorial on that, iOS: Back up and restore your iOS device with iCloud or iTunes
-A: Reset your network settings on your iPhone:
WARNING: You will lose open webpages, including having to reenter passwords for already joined networks.
- Open Settings
- Go down and select General
- Go down and select Reset
- Select Reset Network Settings
- Enter your pass code if you have one setup.
- Select Rest Network Settings
- You'll see a white screen and an Apple logo followed by a black loading screen, and again with a white screen and Apple logo. Once this finishes your phone will load normally.
- If your phone has a pass code unlock it.
- Go to Settings
- Select Wi-Fi
- See if you can find that network you'd like to join, then select it.
- If there is a password required, enter it.
- Hit Join
-B: Restart your iPhone:
WARNING: Close and save any important webpages or documents or you may lose them during this process.
- Press and hold down on the Sleep/Wake button for about 5-10 seconds.
- Slide your finger to the right on slide to power off
- Wait about 5-10 seconds or until the circle looking indicator stops moving.
- Press and hold down on Sleep/Wake button for about 5-10 seconds until you see the white background and an Apple logo.
- Enter in your pass code if there is one.
- Try reconnecting.
-C: Reset your iPhone to factory settings:
!!!WARNING: During this process you'll lose data that may include your contacts, applications, device settings and more.!!!
- Open Settings
- Go down to Reset
- Select Erase All Content and Settings. THIS WILL DELETE CONTENT THAT MAY BE IMPORTANT.
- Enter in your pass code if you have one.
- Select Erase iPhone.
- Follow the following instructions it'll show you.
These are some recommended steps I'd take to try and resolve your issues. If these issues do continue to arise, please don't hesitate to ask for assistance. 🙂
Assuming your got your iPhone 6 a few days ago, you might be eligible for Apple's 90 day AppleCare plan. With this you may be able to contact Apple for further assistance as well. If you'd like to get a live to live person assistance via chat, Apple is available 24/7 to assist you here: http://www.apple.com/support/
Or contact Apple Support at: 1-800-275-2273
Have a wonderful day/evening!