Smart & Connected Life Smart Watches & Wearables How to Unpair Apple Watch and iPhone Don't forget to unpair your watch before setting up a new iPhone By Sam Costello Writer Sam Costello has been writing about tech since 2000. His writing has appeared in publications such as CNN.com, PC World, InfoWord, and many others. our editorial process Facebook Twitter Sam Costello Updated November 27, 2019 image credit: Tomohiro Ohsumi / Contributor / Getty Images. Smart Watches & Wearables Working From Home Headphones & Ear Buds Smart Home Smart Watches & Wearables Travel Tech Connected Car Tech iPods & MP3 Players Tweet Share Email Upgrading to a new iPhone is exciting, but don't forget to unpair your Apple Watch and iPhone first. You may want to run home and set up your new phone right away. But if you've got an Apple Watch that you used with the old iPhone, first you have to unpair the two devices to avoid problems. When you set up an Apple Watch, you connect it to your iPhone in a process called pairing. Pairing allows your Watch to get notifications from the phone and to send data like your exercise levels to the Health app on the iPhone. An Apple Watch can only be paired to one iPhone at a time (it works differently in the other direction: multiple Watches can be paired to the same phone). Because of that, you have to make sure that you've unpaired your Apple Watch from your old iPhone before you can pair the Watch to your new one. If you don't, it's not the end of the world, but you will lose some data. And why lose data if you don't need to? This article shows you how to backup your Apple Watch, how to unpair the Apple Watch, and then how connect your Watch and its data to your shiny new iPhone. Just got a new iPhone and looking for instructions on how to connect your existing Apple Watch? Check out How to Pair an Apple Watch With a New iPhone. How to Unpair Apple Watch and iPhone on Your Phone To unpair your Apple Watch from your old iPhone before upgrading to a new iPhone, follow these steps: On the old iPhone that's going to be replaced, and that's paired to the Apple Watch, tap the Apple Watch app to open it.Tap your Watch at the top of the screen.Tap the i icon next to your Watch.Tap Unpair Apple Watch.If you have an Apple Watch model will cellular data access, you'll need to decide what to do with your monthly plan (if you have a different model, skip this step). If you plan to pair this Watch and iPhone again, tap Keep Plan. If you're going to pair a different Watch and iPhone combination, tap Remove Plan.In the menu that pops up at the bottom of the screen, tap Unpair [Watch Name].Next, you'll be prompted to enter your Apple ID password. This is crucial, because it's turns off a number of features on the Watch, such as Activation Lock and Find My Watch. If you don't do this, you won't be able to unpair and your Watch will continue to be connected to your old phone.When you've entered your password, tap Unpair.The unpairing process begins. It will take a few minutes.When your Apple Watch reboots to the language-choice screen, you've completed unpairing it from your iPhone. One reason that the unpairing in step 9 takes so long is that the data on your Watch is backed up to your iPhone at this point. This backup can be added to a new Apple Watch if you're going to pair one to your iPhone. After Unpairing, You Can Upgrade At this point, you should follow the standard steps to upgrade your phone: Make a backup of the old phone (since you unpaired your Watch in step 8, this will include both the data from your iPhone and the data from your Watch)Use an encrypted backup if you want to store secure data like Health info and saved passwordsActivate the new iPhone and restore the backed-up data onto it. When the new phone is set up, follow the standard steps to pair your Apple Watch to your new iPhone. How to Unpair Apple Watch and iPhone Without Using iPhone The unpairing process described in the last step is pretty easy, but what happens if you upgrade to a new phone without unpairing your Apple Watch? There are two options. First, if you restore your new iPhone from backup during set up, this should also restore most or all of your Apple Watch data. However, if you set up your iPhone without restoring from a backup, you'll lose whatever data is stored on the Watch. Depending on how much data you store on your Watch, this may not be a big deal. The most common data stored on your Watch is from the Health app or data from the apps you've installed on the Watch. If you don't have this data, or don't care about keeping it, you're in the clear. How to Erase Apple Watch If you haven't unpaired for Watch from your iPhone, you need to erase the data that's on the Apple Watch first. Then it will be ready to pair to your new phone. Just follow these steps to erase your Apple Watch and prepare it for pairing to a new phone: On your Apple Watch, choose the Settings app.Tap General.Tap Reset.Tap Erase All Content and Settings.Enter your passcode, if prompted.If your Watch has cellular features, choose whether to keep your cellular data plan. Since you're going to pair this Watch to your phone right away, you'll probably want to keep the plan. Tap Erase All to remove the plan or Erase All & Keep Plan.When the Watch has rebooted to the language-choice screen, tap your preferred language.On your new phone, tap the Apple Watch app to open it and set up the Watch as you would a brand-new Watch. Depending on what you want to do with the Watch at this point, you may need to remove Activation Lock. That's not necessary if you're going to pair it to another iPhone you own, but if your plan is to sell it or give it away, you should. The new owner won't be able to use it while it's still locked to your account. Learn how to remove Activation Lock using iCloud in How to Unlock iCloud-Locked iPhones.