My iPhone 8 Says "No Service"! Here's The Fix.

1. Go to the Settings app.
2. Tap Cellular.
3. Make sure the switch next to Cellular Data is turned on. You'll know it's on when the switch is green and positioned to the right.
4. If the switch is already on, try turning it off and back on to give your iPhone a second chance to connect to its cellular network.

1. Plug your iPhone into your computer using a Lightning cable (charging cable).
2. Open iTunes.
3. In the upper left hand corner of iTunes, click the iPhone icon. 
4. In the top box underneath iPhone, click Check For Update.
5. If an update is available, click Update.
6. Keep your iPhone plugged into your computer while the update downloads and installs.

1. Make sure that your iPhone is connected to a Wi-Fi network, or that Cellular Data is turned on.
2. Open the Settings app.
3. Make Tap General.
4. Tap About.
5. After a few seconds, if a carrier settings update is available, you'll see a pop-up on the screen of your iPhone which says, "New settings are available. Would you like to update them now?"
6. Tap Update.

1. Open the Settings app.
2. Tap Cellular.
3. Tap Cellular Data Options.
4. Tap Roaming.
5. Turn on the switch next to Voice Roaming. You'll know it's on when the switch is green.

1. Use a SIM card ejector tool or small paperclip to open the SIM card tray on the right side of your iPhone.
2. Close the tray once you've opened it.

1. Open the Settings app.
2. Tap General.
3. Scroll down and tap Transfer Or Reset iPhone.
4. Tap Reset.
5. Tap Reset Network Settings.
6. Enter your passcode if prompted.
7. Your iPhone will shut down, reset, and turn itself on again when the reset is complete.

1. Go to the UpPhone cell phone plan comparison tool.
2. Use the sliders to select how many minutes, messages, and gigabytes of data that you need.
3. Use the menus to select the features, pricing structure, and contract type that you want.
4. Click View Plan when you've found one that you're interested in!

1. Verizon: 1-(800)-922-0204
2. Sprint: 1-(888)-211-4727
3. AT&T: 1-(800)-331-0500
4. T-Mobile: 1-(877)-746-0909

How To Repair Your iPhone With Apple's Mail-In Service

1. Visit Apple's support website to begin the online mail-in repair process.
2. Alternatively, call 1-800-MY-APPLE (1-800-692-7753) to set up a repair.

How To Repair Your iPhone At The Genius Bar Inside Your Local Apple Store

1. Visit Apple's website to make a Genius Bar appointment before you go into the store. Apple Stores are extremely busy, and if you don't have an appointment, you may have to wait for hours or end up being turned away. (Editor's note: I'm a former Apple tech and we're not exaggerating — please, do yourself a favor and make an appointment first!)
2. When you arrive, go to the Genius Bar to check in for your appointment.
3. Genius Bar appointments always include free diagnosis. If you're under warranty, many repairs can be done on the spot, but it all depends upon which parts are in stock. If you're not under warranty, the Genius will give you a quote for the cost of a repair.