Many new features are added in iOS 12. The beta 1 of iOS 12 is already out. But it is not stable and has bugs. So, you can install iOS 12 beta 2 update. This is the ipsw file of the firmware. So you need no developer account. You can install it manually on your phone via itunes.
iOS 12 Beta 2 iPhone, No UDID or Developer
The wait is over and iOS 12 beta 2 firmware update for iPhone is available now. You can find direct ipsw download links below and the instructions are also given to install the update.
iOS 12 Features
iOS 12 is greatly optimized and upgraded with new features. It is in the beta stage and not yet stable.
Download iOS 12 Beta 2 IPSW iPhone
Download the IPSW file of iOS 12 beta 2 from these links. After downloading the file, follow installation instructions.
iOS 12 Beta 2 for iPad
Note: Links will be available soon. Check back again. That is how you can have the the latest iOS 12 Beta 2 IPSW on iPhone. Ask your queries in comment below. Subscribe to get updates of latest iOS firmwares.
First of All download the ipsw firmware file from above links. Connect your Phone to the PC or Mac. Launch iTunes. Make sure to backup your data before installing the beta update. One top letf, tap on the small device option. Now, if you are on Windows PC, hold “Shift” button and click on “Update”. If you are on Mac, hold “Option” button and click on “Update”. After clicking on Update, navigate to iOS 12 beta 3 ipsw file that you just downloaded and select it. The firmware will now start installing on your phone. When done, your phone will restart and you can disconnect from PC.
By doing above steps you can download the latest iOS beta firmware on your phone.