What iCloud backup does and how to turn it on
iCloud backup stores a copy of your iPhone's data — photos, messages, contacts, settings, app data — on Apple's servers. When you set up a new iPhone or restore an old one, you can pull everything back from that backup instead of starting from scratch. The backup happens automatically over Wi-Fi once you turn it on, usually at night when your phone is plugged in and locked.
To turn on iCloud backup, open Settings on your iPhone, tap your name at the top, then tap iCloud. Scroll down and tap iCloud Backup. Toggle the switch to on (it will turn green). Your phone will start backing up the next time it meets the conditions: connected to Wi-Fi, plugged into power, and locked. The first backup can take an hour or more depending on how much data you have.
You can also force a backup to happen right now instead of waiting. In that same iCloud Backup screen, tap Back Up Now. Keep your phone plugged in and on Wi-Fi while it runs — if you unplug it or turn off Wi-Fi, the backup will pause and resume later.
Key Takeaways
- iCloud backup automatically saves your photos, messages, contacts, and app data to Apple's servers when your iPhone is plugged in, locked, and on Wi-Fi.
- You turn on iCloud backup in Settings > [Your Name] > iCloud > iCloud Backup, then toggle the switch on.
- Your iPhone gets 5 GB of free iCloud storage; photos and videos count toward this limit, but app data and settings usually do not.
- If you run out of storage, backups will pause until you delete old backups, buy more storage, or remove photos and videos from your phone.
- You can restore from an iCloud backup during iPhone setup or later through Settings > [Your Name] > iCloud > iCloud Backup > Restore.
Understanding iCloud storage limits and what counts against them
Every Apple account comes with 5 GB of free iCloud storage. This space holds your backups, but also your iCloud Drive files, iCloud Photos, and email if you use an iCloud email address. Photos and videos you take on your iPhone count heavily against this limit — a single high-resolution photo can use 3 to 5 MB, and a minute of video can use 50 MB or more.
App data and settings usually do not count toward your storage limit, which is why many people with moderate app use can fit a backup in the free 5 GB. But if you take a lot of photos or videos, or if you use iCloud Drive to store documents, you will fill up fast. You can check how much storage you are using by going to Settings > [Your Name] > iCloud > Manage Storage.
When your iCloud storage is full, backups will not happen. Your phone will show a warning in Settings, and you have three options: delete old backups you no longer need, buy more storage (50 GB for $0.99 per month, 200 GB for $2.99 per month, or 2 TB for $9.99 per month), or remove photos and videos from your phone to free up space. Many people choose to buy 50 GB because it costs less than a coffee per month and solves the problem permanently.
How to check if your backup is working
The easiest way to know your backup is running is to look at the date and time it last completed. Go to Settings > [Your Name] > iCloud > iCloud Backup. At the bottom of the screen, you will see "Last Backup" with a date and time. If that date is recent (within the last day or two), your backup is working.
If the date is old or says "Never," your backup has not run yet. This usually means one of three things: your phone has not been plugged in and locked on Wi-Fi since you turned on iCloud backup, your iCloud storage is full, or you are signed out of iCloud. Check that you are signed in by looking at the top of the iCloud settings screen — you should see your name and Apple ID email. If you see "Sign In," tap it and enter your credentials.
You can also force a backup right now by tapping Back Up Now on that same screen. Keep your phone plugged in and on Wi-Fi while it runs. If the backup fails or gets stuck, try restarting your phone: hold down the power button, slide to power off, wait 10 seconds, then power it back on.
What happens when you restore from an iCloud backup
When you set up a new iPhone, the setup screen will ask if you want to restore from an iCloud backup. Tap Restore from iCloud Backup, sign in with your Apple ID, and choose which backup to restore from (usually the most recent one). Your phone will read everything from that backup — photos, messages, contacts, app data, settings — and install it on the new phone. This can take 30 minutes to several hours depending on how much data you have and how fast your Wi-Fi is.
You can also restore from a backup on an existing iPhone if you want to go back to an earlier state. Go to Settings > [Your Name] > iCloud > iCloud Backup > Restore. This will erase your current iPhone and replace everything with the backup you choose, so only do this if you are sure. Your phone will restart during the process and may take a while to finish.
One important thing to know: restoring from backup does not restore deleted apps. If you deleted an app after your last backup, it will not come back when you restore. You will need to reinstall it from the App Store yourself. Everything inside the app — messages, photos, settings — will be there, but the app itself has to be downloaded again.
Turning off iCloud backup and managing old backups
If you want to stop iCloud backups, go to Settings > [Your Name] > iCloud > iCloud Backup and toggle the switch off. Your existing backups will stay in iCloud for 180 days, then Apple will delete them automatically. If you want to delete a backup sooner, you can do it manually.
To delete a specific backup, go to Settings > [Your Name] > iCloud > Manage Storage > Backups. You will see a list of all your backups, each labeled with the device name and date. Tap the one you want to delete, then tap Delete Backup. This will free up storage space when ready. Many people keep only their most recent backup and delete older ones to save space.
If you have multiple devices — an iPhone, iPad, and Mac — each one creates its own backup in iCloud. All of these backups count toward your 5 GB limit. You can see how much space each device is using in the Manage Storage screen, which helps you decide which backups to keep or delete.
Backing up photos and messages separately if iCloud storage is tight
If your iCloud storage is full and you cannot buy more, you have other ways to back up the things that matter most. Photos can be backed up through iCloud Photos (which requires a paid iCloud+ subscription) or through Google Photos, Amazon Photos, or other cloud services. Messages can be exported through third-party apps or backed up to your computer using a Mac or Windows PC.
For photos, read Google Photos from the App Store, sign in with a Google account, and turn on backup. Google Photos gives you unlimited storage for "high quality" photos (slightly compressed) for free, which is a good option if you take a lot of pictures. For messages, you can use a computer to back up your iPhone through a USB cable — plug your iPhone into a Mac or PC, open Finder (Mac) or iTunes (Windows), select your phone, and click Back Up.
These separate backups do not replace iCloud backup — they just protect specific types of data. If you want a full backup of everything on your phone, you still need iCloud backup or a computer backup. But if you are only worried about losing your photos or messages, these targeted backups are faster and do not require much storage space.
Frequently Asked Questions
Does iCloud backup include my text messages and iMessage conversations?
Yes. iCloud backup saves all your text messages, iMessage conversations, and the photos and videos inside those conversations. When you restore from backup, all your message history comes back. The only exception is SMS messages older than a certain point if you have a very old iPhone, but modern iPhones back up everything.
Can I back up my iPhone while I am using it, or does it have to be locked?
iCloud backup only runs when your phone is locked, plugged into power, and on Wi-Fi. If you use your phone while a backup is running, the backup will pause and resume later when the phone is locked again. This is why backups usually happen at night — your phone is more likely to be locked and plugged in.
What if I switch to a different Apple ID — will my old backups still be there?
No. Backups are tied to the Apple ID that created them. If you sign out of your current Apple ID and sign in with a different one, you will not see your old backups. You can still restore from the old backup if you sign back in with the original Apple ID, but you cannot access it with a new account.
Does iCloud backup save my passwords and credit card information?
iCloud backup saves passwords stored in your Keychain and credit card information stored in Apple Pay, but only if you have two-factor authentication turned on for your Apple ID. This is a security feature — Apple does not want your passwords backed up to the cloud unless your account is well protected. Check Settings > [Your Name] > Password & Security to see if two-factor authentication is on.
How long does it take to restore from an iCloud backup on a new iPhone?
It depends on how much data you have and your Wi-Fi speed. A backup with a few GB of data might take 30 minutes to an hour. A backup with 50 GB or more can take several hours. During the restore, your phone will restart and may appear frozen or stuck — this is normal. Do not unplug it or turn off Wi-Fi until the restore is complete.