Finding a suitable iPhone 7 to jailbreak is a tricky business. This is even more so the case for those looking to buy brand new ones. Here's a simple guide on how to ensure that the iPhone 7 to be purchased is still under iOS 10.1.1 for the latest jailbreak tool to work.

More often than not, most iPhone 7 in stores right now are already updated to iOS 10.2, especially the newer batches. For those serious about jailbreaking Apple's newest handset, Paul Morris of Redmondpie put up a recent post that outlines some simple steps in getting the correct iPhone 7 for the jailbreak tool to work.

The only important thing to look for before buying an iPhone 7 is its current iOS version. Not every store will allow customers from snoop into an iPhone 7 on display just for curious customers to check the firmware version.

Luckily, there's a way to track an iPhone 7's potential firmware version and see if it is still at iOS 10.1.1 by doing some simple steps. As stated in the guide, heading over to https://sndeep.info/en will allow users to check the production week of a particular iPhone 7.

To do this, simply get the serial number of a particular iPhone 7 box and enter it on the website. By doing this, users would find the manufacturing date or week of that particular iPhone 7.

As the guide highlights, iPhone 7 units manufactured before week 45 have some good odds of having iOS 10.1.1 installed. However, this is if none of the store staffs have opened the box before to apply some updates as a directive from their management.

The best way to ensure the accuracy of the said method is to see the box first hand. It is also worth noting that this method may not be an option as days go by. Hundreds, if not thousands, of people all over the globe are buying iPhone 7 handset and there's no assurance how long units with iOS 10.1.1 will last. Jailbreaking the device will prove harder from that point onwards.