Equal opportunity malware hits both iOS and Android33
If your Apple iPhone is jailbroken, you can try your best to avoid Xsser by limiting the software you install on your phone, to those produced by trusted sources. If you get a source warning, run far away from it. Returning your device to stock will obviously end the danger as long as you're not already infected. Android users should stick to the Play Store for their apps and content. Make sure that your phone is not set to "allow installation of apps from unknown sources".
It is scary to see how phone users can be manipulated. A phishing message that was made to look like it came from WhatsApp, was sent to pro democracy protesters in Hong Kong. The message read, "Check out this Android app designed by Code4HK, group of activist coders, for the coordination of Occupy Central!" Obviously an attempt to entice protesters, once the link is clicked, the phone becomes infected.
Normally, you can't get iOS and Android users to agree on what the day of the week is. But malware infection is something that iOS and Android users can actually agree on. Both groups don't want to have personal information stolen by hackers. Stay away from unknown sources, use common sense and the odds that you will avoid Xsser will improve.