What happens when you switch phones

When you get a new phone, you have two separate things to move: your phone number (which your carrier manages) and your data (photos, contacts, apps, messages — which live on the device itself or in cloud storage). Moving your number takes a few hours to a few days and involves your wireless carrier. Moving your data can happen in minutes if you use the right tool, or take much longer if you do it manually.

The fastest path depends on whether you're switching to the same type of phone (iPhone to iPhone, Android to Android) or crossing over (iPhone to Android or vice versa). Same-type switches have built-in tools that move almost everything at once. Cross-platform switches require more steps because the operating systems don't talk to each other the same way.

Key Takeaways

  • Your phone number stays with your carrier, not your phone — contact them to port it to your new device, which usually takes 24 hours.
  • iPhone-to-iPhone and Android-to-Android transfers use built-in tools (iCloud and Google respectively) that move contacts, photos, messages, and app data in one process.
  • Switching between iPhone and Android requires moving data through Google Drive, iCloud, or a computer, since the systems don't have a direct bridge.
  • Back up your old phone before you start, either through your carrier's tool, cloud storage, or a computer connection.
  • Your apps reinstall on the new phone, but you may need to sign back into them individually.

Moving your phone number to your new device

Your phone number belongs to your wireless carrier, not to your phone. When you switch devices on the same carrier, the number moves automatically once you set up the new phone. When you switch carriers, you need to request a port — a formal transfer of your number from one company to another.

To port your number, contact your new carrier and tell them you want to bring your existing number. They will ask for your account number and PIN from your old carrier (you can find these on your old bill or by calling customer service). The port usually takes 24 hours but can take up to a few business days. During this time, your old phone may lose service for a few hours. Keep both phones nearby until the transfer is complete.

If you're staying with the same carrier, straightforward insert your new phone's SIM card (the small chip that connects you to the network) and turn it on. The carrier will recognize the device and set up your number on it within a few minutes. If your new phone uses eSIM instead of a physical card — which newer iPhones and some Android phones do — your carrier can transfer the eSIM digitally through their website or app.

Transferring data from iPhone to iPhone

Apple's Quick Start tool moves your entire setup to a new iPhone in about 15 minutes. Turn on your new iPhone and hold it near your old one. Your old phone will show a setup screen; tap it and follow the prompts. The new phone will scan a code from the old one and begin copying your data over Wi-Fi.

Quick Start transfers your Apple ID, Wi-Fi passwords, Face ID or Touch ID settings, home screen layout, messages, photos, contacts, calendar events, notes, reminders, and app data. It does not transfer your apps themselves — those read from the App Store automatically after the transfer finishes, which can take an hour or more depending on how many you have.

If Quick Start doesn't work (for example, if your old phone is too old), you can restore from an iCloud backup instead. On your new iPhone, choose "Restore from iCloud Backup" during setup, sign in with your Apple ID, and select the backup you want. This takes longer than Quick Start but moves the same data.

Transferring data from Android to Android

Google's setup wizard handles the transfer when you turn on a new Android phone. During the initial setup, you'll be asked to sign in with your Google account. Choose "Copy apps and data from your old phone" and follow the prompts. The wizard will move your contacts, calendar, Gmail, photos, messages, and app data.

The transfer happens over Wi-Fi and can take 30 minutes to several hours depending on how much data you have. Your apps will read and reinstall automatically. Some apps may ask you to sign back in when they open for the first time on the new phone.

If you don't have your old Android phone available, you can restore from a Google Drive backup instead. During setup, sign in with your Google account and choose "Restore from backup." Google will restore the data it has stored in Drive, though some app data may not be included if the app doesn't use Google's backup service.

Moving data from iPhone to Android

There's no direct bridge between iPhones and Android phones, so you'll need to move your data in pieces. Google offers a Switch to Android app that you can read on your iPhone from the App Store. This app moves your contacts, calendar events, photos, and some message history to your Google account. Open the app, sign in with your Google account, and follow the steps. The transfer takes 15 to 30 minutes.

After the transfer, turn on your new Android phone and sign in with the same Google account during setup. Your contacts and calendar will appear automatically. Your photos will be in Google Photos if you chose to back them up during the transfer.

Messages don't transfer automatically between platforms. If you need your old text messages, you can export them from your iPhone to a file, but most Android phones can't read iPhone message formats directly. Many people straightforward accept that old messages stay on the old phone and start fresh on the new one.

Moving data from Android to iPhone

Apple's Move to iOS app (available on Google Play) handles this transfer. read it on your Android phone, open it, and follow the setup prompts. The app will move your Google contacts, calendar events, photos, and some message history to your new iPhone over Wi-Fi.

Turn on your new iPhone and choose "Move Data from Android" during setup. Keep both phones connected to Wi-Fi and plugged in until the transfer finishes, which usually takes 15 to 45 minutes. Your contacts and calendar will appear in the iPhone's native apps, and your photos will be in the Photos app.

Like the iPhone-to-Android transfer, messages don't move between platforms. You'll also need to reinstall your apps on the iPhone — the Move to iOS app can't transfer Android apps because they're built for a different system.

Backing up before you switch

Before you start any transfer, back up your old phone. This protects you if something goes wrong during the switch and gives you a copy of your data on a separate device.

On iPhone, go to Settings > [Your Name] > iCloud > iCloud Backup and tap "Back Up Now." This sends your data to Apple's servers. On Android, go to Settings > Google > Manage Your Google Account > Backup and make sure "Backup to Google Drive" is turned on, then tap "Back Up Now."

You can also back up to a computer. Connect your iPhone to a Mac or PC, open Finder (Mac) or iTunes (Windows), select your phone, and click "Back Up Now." For Android, connect to a computer and copy your photos and files to a folder on your hard drive. This gives you a local copy separate from cloud storage.

What to do after the transfer is complete

Once your data has moved and your phone number is active, take a few minutes to check that everything arrived correctly. Open your contacts app and verify that your contacts are there. Check your photos app to confirm your pictures transferred. Open a few of your most-used apps and sign back in if needed.

Some apps may not have transferred their data — this is normal and depends on whether each app uses the system's backup service. You may need to sign back into banking apps, social media, email, and messaging apps individually. Your passwords won't transfer for security reasons, so have your password manager or written list handy.

Delete any sensitive data from your old phone before you sell it, give it away, or recycle it. On iPhone, go to Settings > General > Reset > Erase All Content and Settings. On Android, go to Settings > System > Reset Options > Erase All Data. This wipes the phone completely and makes your old data unrecoverable.

Frequently Asked Questions

Can I transfer my data if my old phone won't turn on?

If your old phone is completely dead, you can only restore from a backup you made earlier. If you backed up to iCloud (iPhone) or Google Drive (Android), you can restore that backup to your new phone during setup. If you never backed up, your data on that phone is lost, though your photos and contacts may still be in cloud storage if you were using those services.

Do I need to keep my old phone after the transfer?

You don't need to keep it, but it's wise to wait a few days after the transfer to make sure everything works on your new phone. Once you've confirmed that your data arrived and your number is working, you can safely wipe and recycle your old phone. Keep it nearby for at least 24 hours in case you need to reference something or troubleshoot.

Will my apps work on the new phone?

Apps that are available on your new phone's app store will reinstall automatically during the transfer. Apps that were removed from the store or are no longer compatible with your new phone's operating system won't reinstall. You may need to find alternatives for those apps on your new platform.

What if my contacts didn't transfer?

Check that you're signed into the correct account on your new phone. On iPhone, go to Settings > [Your Name] and confirm you're using the right Apple ID. On Android, go to Settings > Google and confirm you're signed into the right Google account. If you're signed in correctly, your contacts should appear within a few minutes. If they still don't show up, try signing out and back in.

Can I transfer my phone number to a different carrier at the same time?

Yes. Contact your new carrier and request a port before you set up your new phone. Provide your old carrier's account number and PIN. The port takes 24 hours, and during that time your old phone will lose service. Once the port completes, your number will be active on your new phone with your new carrier. You can transfer your data at the same time — the two processes happen independently.