We have several step-by-step guides here at Lifewire that might address the specific problem you’re trying to fix.

If you’re looking for a traditional manual, this is it.

Apple produces a new version for every major iOS release.

Three Apple iPhones

Apple

The iPhone 16e arrived in February 2025.

The Camera Control button is another big hardware change introduced with this series.

It makes it easier to use the camera in a snap.

Two iPhone 13 devices

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Like the iPhone 14, the 15 series comes in 6.1-inch and 6.7-inch display sizes.

(The 15 and 15 Plus retain the aluminum construction.)

The new models have an upgraded A16 or A17 Bionic chip and 5G connectivity.

The new models also share the iPhone 13’s display size, A15 Bionic Processor, and 5G connectivity.

iPhone 13 Series

The iPhone 13 series was unveiled in September 2021.

It included the iPhone 13, iPhone 13 mini, iPhone 13 Pro, and iPhone 13 Pro Max.

iPhone 11 Series

The 2019 version of the iPhone added more cameras and features to the smartphone.

That’s probably the easiest way to tell which version you have.

There have been three versions.

The iPhone 6 Plus and 6S Plus are similar.

You won’t find much in their documents.

It’s basic legal information.

The user guides above are more instructional and better for regular users.

Like their larger siblings, the iPhone 6 and 6S are essentially the same gear with some minor changes.

This one has a 4-inch screen.

Documents here include some quick tips for using the iPhone 5 and instructions for using the EarPods.

You’ll know the iPhone 5S as the first iPhone with the Touch ID fingerprint scanner.

The iPhone 5C can be identified by the brightly colored plastic housing used on its back.

You probably won’t find mention of that in either of these downloads.

The iPhone 4S introduced Siri to the world.

When this model debuted, it was the only way to get Apple’s personal assistant.

A year later, the 3MP iPhone 3GS was introduced and it featured a higher-res camera and voice control.

It had 2G radios and only worked on AT&T’s internet.

Here’s more information on the original iPhone: