The best way to know if you have an iPhone virus is to check for the following signs: unfamiliar or crashing apps, lots of Safari pop-ups, unusual charges or data usage, a rapidly draining battery, or a consistently hot phone. As your device ages, you may notice a decrease in speed or battery life.

To get the AltStore onto your iPhone or iPad, you'll first need to install AltServer. Click the Windows (beta) link. It's under the "Download AltServer for &" header. This downloads a file called "altstaller.