Prepared upgrade to iOS 12 beta next week

iOS 12 will be introduced late June 5th at event # WWDC18 Apple will launch our first beta soon after the event ends

Check your equipment is supported or not?
Last year, old equipment for which iOS 11 support is iPhone 5S and there is the possibility this year the equipment was introduced in 2013 and 5S, in particular, will not be upgraded. Below is a list of devices will support iOS 12, note this list is for reference only
List of iPhone:
    • iPhone X
    • iPhone 8 Plus
    • iPhone 8
    • iPhone 7 Plus
    • iPhone 7
    • iPhone 6s
    • iPhone 6s Plus
    • iPhone 6
    • iPhone 6 Plus
    • iPhone SE
    • iPhone 5S
Memory cleanup
Often for updates on the iPad or iPhone will require a capacity of the equipment from 2-5 GB. You can manually clean up by deleting a few things:
    • Photos and video
    • Message
    • Remove unused applications
    • Delete songs that are less heard
    • Safari Cleanup : Settings >> Safari >> Clear history and website data
    • If you have orthopedic iPhotos or edit film in iMovie, make sure that you export your movie into files and delete projects in-app. Those projects can take up to several GB
    • Some of the apps can download content such as Netflix or Youtube, you can delete it off 
You should go to Settings >> General >> iPhone Storage to manage storage

Data backup, important!
Apple launched its first beta so there will be many bugs, just simply let iTunes or iCloud update.

Backup to iTunes on computer
       1. Connect the device to your computer, run the iTunes app
       2. Click on the device displayed on iTunes, scroll down will see the Backup-Restore area
       3. There are two options: iCloud means that we will put the backup on the cloud for storage, and this computer will save directly to the computer.
       4. Finally, click Backup Now to proceed with the backup

Backup on iCloud:
       1. On the phone, go to Settings >> select Apple ID >> iCloud >> iCloud Backup >> Back Up Now
       2. Or do the same thing with iTunes on your computer, select iCloud at the step where you choose to save the file Back up