Setup a new iPhone or iPad
The most important part of upgrading to a new iPhone or iPad lies with your old device. I highly recommend that you do NOT let your carrier (AT&T, Verizon, etc.) do this for you. They will most certainly mess up the process and you will likely not get all of your content moved from your old device to your new device (pictures, apps, texts, etc).
Here is how to do it yourself - it really is easy:
Leave your new device in the box for right now.
Hold the power button of your old device (top right or upper right side) until you see “Slide to power off”. Slide it.
After about 30 seconds, hold that same power button to turn your device back on. Fully unlock the device. You should see your home page.
Now, let’s backup your device (make of a copy of its apps, settings and your content - pictures, videos, emails, texts, etc.) to somewhere safe. This is the most important part of getting a new device!! I recommend you use iCloud to do this. Your device will need to be on Wi-Fi for this to work:
Open the Settings app, tap [your name] and then tap “iCloud”.
Scroll down to the iCloud Backup setting and tap it.
Make sure that iCloud Backup is switched on. If it is not, tap it to turn it on. Below that, tap “Back Up Now.” Wait for the backup to complete.
If you get a backup error it is often that there is not enough room on iCloud to backup. If that is the case, go to Settings > iCloud > Storage > Change Storage Plan. Then go back to the steps above to try backing up again.
Once your old device is backed up you are ready to open the box of the new device.
For most carriers, your phone number will transfer as part of the new iPhone setup. If it does not, (and you are not changing carriers) follow this:
Turn off your old iPhone. Using a small bent paperclip, remove the SIM card on the right side of the old iPhone and insert it into the same tray on the new iPhone. This will transfer your phone number. If the SIMs are different sizes and you cannot do this, contact your carrier for instructions on how to transfer your phone number.
Turn on your new device and answer the first few easy questions (language, country, Wi-Fi network, etc.). When it asks choose “Restore from iCloud Backup”. Choose the most recent backup of your old device. This restore may take an hour or more. Do not remove the new device from Wi-Fi (like leave your home with it). Plug it in to charge and put it in the same room as your Wi-Fi router. To check to see if it is done: Settings > iCloud > Backup.
The first part of the restore will happen during a long restart. Then your apps will load. After that your photos and music will restore.
That is it! You can do it yourself and the results will be much superior to having your carrier do it.