I work in telecom and we sometimes test multiple versions of our IMS app, swapping out back and forth. NOTICE: These apps we are using are NOT on the App Store as they are ALPHA or BETA internal use only for finding bugs and issues with transport/session management/etc. I can't do my job anymore, as the App Store updated iTunes auto. And while I am using an older version of iTunes I found on the web, I really am worried that one day it'll stop functioning. What is a long term solution to someone who needs to add an app that is NOT in the App Store to an iPhone/iPad?