Blocking iOS Wifi automatic update downloads?

Question

I've got several iPads connected to Verizon mifi devices(MiFi460LE)

iOS has a "feature" that automatically downloads OS updates in the background without user input. (You still need to manually install the updates, but the downloads happen automatically).

The 6.1 update may break the functionality of some in-house applications, and I'd rather not hand users an iPad with a flashing self-destruct button that tells users to "download now!"

Is there a specific port that could be blocked to prevent iOS OTA software updates? If that's not sufficient, would blocking hosts from DNS or another way of preventing these downloads be feasible?

Answer 1

The latest update to the evasi0n jailbreak, evasi0n 1.2, allows you to disable OTA updates.

This is a fairly good tailored version of evasi0n considering the fact that it's the second update it received since it was released if you are hesitating about the down sides of jailbreaking on device performance.

Turning off iCloud might be a disadvantage. If you really want to disable OTA updates; I strongly suggest you to jailbreak.

Here is a tutorial for jailbreaking with evaisi0n.

P.S. If you will download evais0n, ONLY download it from evasi0n.com. Do NOT trust other sources.