Worried about losing photos, contacts and messages? Here’s how to back up your phone: turn on automatic cloud backup, check that it finished, and keep your storage from running out.
This guide is part of our wider coverage of mobile phones and gadgets.
| Item | Value |
|---|---|
| How long iCloud keeps backups after you switch iCloud Backup off | 180 days |
| How long to leave a slow iCloud backup connected to power and Wi-Fi | 24 hours |
| Free Google One storage (per a 22 July 2021 report) | First 15GB |
| Paid Google One storage range (per a 22 July 2021 report) | 100 GB up to 30 terabytes |
| Android versions Backup by Google One was expected to reach (per a 22 July 2021 report) | Android 8.0 onward |
These figures come from Apple Platform Support and TechRadar. Plans, limits and menus can change, so check the source before you rely on them.
Why a phone backup protects you
A phone is easy to drop, lose or replace. According to Apple’s support page dated September 24, 2026, a backup gives you a copy of your information to use in case your device is ever replaced, lost or damaged. You can read the details on Apple Support.
The same idea applies on Android. A backup is only useful if it exists before something goes wrong, so the goal is to set it up once and then confirm it keeps running.
A good routine covers three jobs:
- Switch on automatic backup so you don’t depend on memory.
- Check the date of the last successful backup now and then.
- Keep enough cloud storage free for the next backup to finish.
How to back up an iPhone with iCloud
Apple lets you back up manually, automatically, or both. A manual backup is handy before you trade in or repair a phone, because you can start it on the spot.
Apple’s steps for a manual backup, as published on its support page, are:
- Connect your device to a Wi-Fi network.
- Open the Settings app, tap your name, then tap iCloud.
- Tap iCloud Backup.
- Tap Back Up Now.
- Stay connected to your Wi-Fi network until the process has finished.
Under Back Up Now, the date and time of your last backup will be displayed. That line is the quickest way to confirm that your backup actually ran.
Turn on automatic backups
According to Apple’s iCloud User Guide, once you turn on iCloud Backup, your device information is backed up over Wi-Fi when the device is turned on, locked, and connected to a power source. To switch it on, go to Settings, tap your name, tap iCloud, tap iCloud Backup, then turn on Back Up This device.
That means an overnight charge is the ideal moment for a backup. If you charge on a pad, our explainer on how does wireless charging work covers the basics.
Backing up over mobile data
If your device and carrier support it, you can also turn on Back Up Over Cellular, which uses cellular data instead of Wi-Fi when Wi-Fi is unavailable, according to the iCloud User Guide. Check your data allowance first, since a full backup can be large.
How to back up an Android phone with Google
Android backups are built around your Google account. A TechRadar report published 22 July 2021 described Backup by Google One as a unified backup service, expected to roll out to all Android users from version 8.0 onward. The report is on TechRadar.
As that report described it, the service builds on an offering that backs up the following, and adds photos, videos and MMS messages:
- App data
- SMS messages
- Call history
- Contacts
- Wi-Fi networks
The report also said users get to choose what is stored and what isn’t. It added that there was no need for a Google One account to use it, so look for the backup option in your phone’s settings and review what is switched on.
Know your Google storage
Storage is shared. The same report noted that Google One offered the first 15GB free, with paid options from as little as 100 GB up to 30 terabytes, shared across services such as Google Drive, Gmail and Google Photos (TechRadar, 22 July 2021). Because email and photos draw from the same pool, a full inbox can leave less room for your phone backup.
Menu names and plans may have changed since that report, and they can differ by phone maker. Treat the report as a guide to what is covered, and check your own settings for the current options.
What if your backup is slow or says storage is full?
The most common iCloud problem is a storage alert. Apple Platform Support, in a page dated October 22, 2025, says you can check the size of the next backup under Settings, your Apple Account, iCloud, Storage or Manage Account Storage, then Backups. Next Backup Size should show the size of the next backup, though it may take a few minutes to calculate (Apple Platform Support).
If the backup needs more room than you have, Apple suggests two routes:
- Delete unneeded information, stop backing up unused apps, or delete old iCloud backups to shrink the backup.
- On a personal Apple Account, update the iCloud+ plan to get more space.
If a backup fails or drags on
When a message says the last backup couldn’t be completed, the same Apple page lists a few checks. Make sure the device is connected to Wi-Fi, install any available update under Settings, General, Software Update, try another Wi-Fi network, and confirm you have enough iCloud storage.
If a backup is simply taking too long, Apple advises you to check the upload speed and leave the device connected to a power source and Wi-Fi for 24 hours. If it still isn’t done, archive important data and try the steps again (Apple Platform Support).
Habits that keep your backup working
A backup you never check can quietly stop. Build a few small habits and your safety net stays intact.
- Look at the last backup date on your phone every so often.
- Leave the phone locked, on power and on Wi-Fi overnight so automatic backups can run.
- Clear out unused apps and old backups before storage fills up.
- Back up manually before a repair, trade-in or upgrade.
Be careful when you turn a backup off. Apple Platform Support notes that if you turn off iCloud Backup for a device, backups stored in iCloud are kept for 180 days before being deleted (Apple Platform Support).
Once your data is safe, a new phone is easier to face. If accessories are on your shopping list, see how to choose wireless earbuds for what to weigh up.
Frequently asked questions
Do I have to back up my iPhone by hand?
Show answer
No. Apple describes both options: you can back up manually, turn on iCloud Backup so it happens automatically, or do both. Automatic backups run over Wi-Fi when the device is on, locked and connected to power (iCloud User Guide).
Can I back up using mobile data?
Show answer
Possibly. If your device and carrier support it, the iPhone has a Back Up Over Cellular setting that uses cellular data when Wi-Fi is unavailable (iCloud User Guide).
What happens to my old iCloud backup if I switch it off?
Show answer
Apple Platform Support says backups stored in iCloud are kept for 180 days before being deleted. Check the Apple page if you need the current wording.
Do I need a paid plan to back up an Android phone?
Show answer
Not necessarily. A TechRadar report of 22 July 2021 said the first 15GB of Google One storage was free and that no Google One account was needed for Backup by Google One. Storage is shared with Gmail, Google Drive and Google Photos, so check your own usage (TechRadar).
