With each new iOS upgrade comes a slew of new security improvements called “patches” that will help protect your iPhone from digital bad guys like hackers and malware and memory corruption flaws. If you don't upgrade, you won't have the latest version, which means your phone is totally susceptible.
So, to answer your question, the answer is no — data is not normally lost during an orthodox OTA update of the Android OS. However, it is advised to ALWAYS maintain a full backup of your personal files (userdata) prior to installing an OTA update, in the event something goes wrong during the process.
Ordinarily, an iOS update should not cause you to lose any data, but what if it doesn't go exactly as it should, again for any reason? Without a backup, your data would simply be lost to you. You could also, for photo's, use something like Google or Dropbox to separately archive your photos and videos.
If you receive a new iPhone you can transfer the data between the two devices and not lose your text messages. This article has some information you can go over to help assist in transferring your data so your content is not lost when you upgrade. With the new iPhone restore from that backup.
If you download iOS 14 on your iPhone, and something goes wrong, you'll lose all of your data downgrading to iOS 13.7. If you eventually want to downgrade, you'll be able to restore your iPhone to your backup, as long as Apple still validates iOS 13.7.
You can use your device normally while downloading the update, and your device will notify you when you can install it. To improve the speed of the download, avoid downloading other content and use a Wi-Fi network if you can.
3. Backup your important files or data. Updating to Android Marshmallow OS will delete all data from your phone like – message, contacts, calendar, apps, music , videos, etc. So it is necessary for you to make backup on sd card or on pc or on online backup service before upgrading operating system.
You'll want to make sure you have enough iCloud storage to back up all your important data. When setting up your new iPhone, you can restore your iPhone from this backup once you've logged into your new device with your Apple ID.
If you need your phone during the day, there's also the option to Install Tonight, which will do exactly that—install iOS 14 while you sleep, provided your device is charging. Your iOS device will then automatically update to the latest version of iOS overnight when it's plugged in and connected to Wi-Fi.
But before you do that, it's important to do one thing: back up your iPhone or iPad so you don't lose your data. All the data on your phone and in your apps could be lost in the updating process. That means your text messages, photos, and other data could suddenly vanish.
Back it upThe first thing you should do is properly back up your phone's files, so you can access them later. You may want to load them back onto your new phone or at the very least, access your photos and videos on a computer or television in the future.
The biggest thing that takes up storage is photos. If you're running iOS 9 or later, then go to Settings -> iCloud -> Photos and enable iCloud Photo Library. Then, make sure optimize iPhone storage is checked. Also, delete any apps that you may not use.
You'll need roughly 2.7GB free on your iPhone or iPod Touch to upgrade to iOS 14, but ideally you'll want a little more breathing room than that. We'd recommend at least 6GB of storage to ensure you get the best possible experiences with your software upgrade.
iOS 14 introduces a new design for the Home Screen that allows for far more customization with the incorporation of widgets, options to hide entire pages of apps, and the new App Library that shows you everything you have installed at a glance.
Although Apple recommends creating a backup of your iPhone before installing iOS updates, you can install the latest system updates for your phone without a backup. It merely provides an option to retain previously saved content such as contacts and media files in case your iPhone runs into problems.
Transfer data to new iPhone: How to use iCloud backups and restoring
- Open Settings on your old iPhone.
- Tap the Apple ID banner.
- Tap iCloud.
- Tap iCloud Backup.
- Tap Back Up Now.
- Turn your old iPhone off once the backup is finished.
- Remove the SIM card from your old iPhone or if you're going to move it to your new one.
If you still need more space than you have on your device, there are a few ways you can update:
- Plug your device into your computer to update using your computer.
- Delete content from your device and try to update again.
- Manage the storage on your device with recommendations.
How to use device-to-device migration
- Turn on your new device and place it near your current device that's using iOS 12.4 or later or iPadOS 13.4.
- Wait for an animation to appear on your new device.
- When asked, enter your current passcode on your new device.
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- Backup your old iPhone and transfer your data to your new device.
- Set up Touch ID or Face ID.
- Switch on accessibility features.
- Customise your Control Centre.
- Switch on & set up iCloud.
- Turn on Family Sharing.
- Get some cool apps!
Update your iPhone, iPad, or iPod touch
- Plug your device into power and connect to the Internet with Wi-Fi.
- Go to Settings > General, then tap Software Update.
- Tap Download and Install.
- To update now, tap Install.
- If asked, enter your passcode.
The backup does nothing to the firmware or iOS - a backup only contains data, not apps, not iOS. If you setup as new, rather than restore from backup, you will lose the following data: Application settings, preferences, and data, including documents. App Store Application data including in-app purchases.
How to exclude your iCloud Photo Library from an iTunes backup
- In Settings > iCloud, tap Photos.
- Tap the iCloud Photo Library switch to off.
- When prompted, you can opt to tap Download Photos & Videos to ensure that all iCloud Photo Library media gets stored in iOS.
- You should be able now to set iTunes to separately sync all the photos on your devices to iPhoto or Photos.
If you do a factory reset, your SD card will not be touched. Your pics, etc will all stay put. If you've selected your Google account as the default way to store your contacts, they will all repopulated from Google after you set up your phone. If you want to be sure you're saving settings, etc.
Back up your iPhone data and settings using iTunes or iCloud before reinstalling iOS. Download and install the latest version of iTunes to reinstall iOS on your iPhone.
Performing a Factory Reset WILL PERMANENTLY DELETE ALL of your data & customized settings, and will also remove any installed Applications. Performing a Factory Reset WILL NOT remove the data & files that are stored on the microSD card in your device.
To reset the settings on your device go to Settings >> General then scroll down and tap the Reset button at the bottom. On the Reset screen tap Reset All Settings – Not Erase All Content and Settings – then you'll need to verify you want to do it twice. It should only take a couple of minutes at most.
Reset All Settings: All settings—including network settings, the keyboard dictionary, the Home Screen layout, location settings, privacy settings, and Apple Pay cards—are removed or reset to their defaults. No data or media are deleted. Wi-Fi is turned off and then back on, disconnecting you from any network you're on.
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