Yes. All iPad minis should be running iOS 6 and can update to iOS 7 this fall.
iOS 7 Can't run on an iPad 1. The hardware is simply not powerful enough to run the operating system. I believe iOS 5 is the newest OS that will run on the original iPad.
The following devices support iOS 7: iPhone 4iPhone 4SiPhone 5iPhone 5CiPhone 5SiPod Touch (5th Generation)iPad 2iPad 3 - "new iPad"iPad 4 - "iPad with Retina display"iPad AiriPad MiniiPad Mini with Retina display
If you have an iOS 7 compatible device, go into Settings>General>Software Update.If your device isn't listed here, it means you can't get the update.The following devices support iOS 7:iPhone 4iPhone 4SiPhone 5iPod Touch (5th Generation)iPad 2iPad 3 - "new iPad"iPad 4 - "iPad with Retina display"iPad Mini
The following devices support iOS 7:iPhone 4iPhone 4SiPhone 5iPhone 5CiPhone 5SiPod Touch (5th Generation)iPad 2iPad 3 - "new iPad"iPad 4 - "iPad with Retina display"iPad AiriPad MiniiPad Mini with Retina display
You can update the following Apple products to iOS 7 legally:iPhone 4iPhone 4SiPhone 5iPod touch (5th generation)iPad 2new iPad (3rd generation iPad)iPad with Retina display (4th gen)iOS 7 is already preinstalled on all of these devices if you have not purchased one yet. The iPhone 5S and 5C must run iOS 7.
iOS 7 won't work on a iPad 1, because an iPad 1 doesnt have enough RAM memory to handle iOS 7. Because of that, Apple didn't make iOS 7 available for iPad 1.
Yes!
The iPad's screen is 0.9 inches bigger.
The iPhone 5 will run iOS 6 or iOS 7.
You have to update your iPad 2 to iOS 5 if you bought it prior to the launch of iOS 5. You can update now to iOS 6 (and soon iOS 7), by plugging your iPad 2 into the computer you authorized with your iTunes account and waiting for the pop up that will ask if you want to install the new software update. The process should take 1-2 hours.
Yes, you can run iOS 7 on the iPhone 4.