iOS 9.0.1 on iPhone 6s: First Impressions and Performance

If you’ve just set up your new iPhone 6s, you’ve probably been asked to install an iOS 9.0.1 update. The update is Apple’s first update for its latest and new flagship. With questions swirling, we’d like to take a look at how the iPhone 6s iOS 9.0.1 update is performing.

On Friday, Apple launched its new flagship iPhone 6s. The 4.7-inch device replaces the iPhone 6 as the company’s most visible option, and does so with a host of brand new features including 3D Touch, new cameras, a brand new processor and more.

The iPhone 6s, like the iPhone 6, runs the company’s brand new iOS 9 operating system. iOS 9 was released about a week before the iPhone 6s release date, and the update brings new features and improvements to all iPhone users.

Last week, Apple released the first iOS 9.0 update, called iOS 9.0. The update is small, slightly larger than 20MB, and comes with some bug fixes for some initial iOS 9 issues. Fixes include a patch for APN issues and a fix for issues with alarms and timers. Small but important.

It’s also one of the first things you see when you open an iPhone 6s (or iPhone 6s Plus) over the weekend. Yes, like the iPhone 6, the iPhone 6s has been updated to iOS 9.0.1 and new iPhone 6s users get the installation prompt during the setup process.

With that in mind, I’d like to take a look at how the iOS 9.0.1 update performs on the iPhone 6s. Minor updates like iOS 9.0.1 can degrade performance so today I want to take a closer look at the update.

These initial iPhone 6s iOS 9.0.1 update impressions don’t serve as my final review of the software, but should help those who are feeling a little ambivalent. As a reminder, you don’t need to install iOS 9.0. Apple will never force you to install iOS updates.

iOS 9.0.1 Installation

During the one hour iPhone 6s installation process, my phone asked me to install Apple’s new iOS 9.0.1 update. All of the iPhones that started arriving Friday are running iOS 9.0 out of the box, not Apple’s new version of iOS 9.

I just downloaded the update. And as with iOS 9.0.1 updates before that, it only took me a few minutes to download and install the new software. iOS 9.0.1 is not a major update and if you have a fast Wi-Fi connection you can expect it to be finished in 10 to 15 minutes.

If you encounter the Slide to Update issue or any other iOS 9.0.1 installation issue on your iPhone 6s, you’ll want to consult our list of fixes.

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iOS 9.0.1 on iPhone 6s Performance

These demos won’t go into many features of iOS 9. If you’re looking for more on these, you’ll want to take a look at our iOS 9 review or our ongoing iOS 9 coverage. They will give you the details you need.

What I’m looking at here is performance and whether the update is worth installing on your 4.7 inch iPhone 6s. Now before I give you my thoughts, you should remember that I am the only person with a version of the T-Mobile iPhone 6s. (I’m running the phone on AT&T’s network.)

I probably don’t use the apps you use, I probably don’t use my phone the way you do. Mileage will always vary from person to person, device to device when it comes to iOS updates. So use my impressions as a general guide.


I installed a backup (from iTunes) on my iPhone 6s. I wanted the look and feel of my iPhone 6 experience to mirror my iPhone 6s experience. This includes the apps themselves and the location of the apps. Their position on the home screen is very important, at least to me.

So far, I haven’t had any major issues with my apps on the iPhone 6s. I used iOS 9.0 for a while before upgrading to iOS 9.0.1, and it didn’t give me any problems either. This is similar to my experience with iPhone 6 minus 50+ Chrome crashes.

iPhone-6s-review - 26

As a reminder, my core apps include Asana, Slack, YouTube, Twitter, Instagram, Gmail, Hangouts, Chrome, Dark Sky, Amazon, SoundCloud, Spotify, and Xbox One Smartglass. I mostly use these apps. I didn’t have any major issues during my three days with iOS 9.0.

Maybe it’s luck. Maybe it’s because I installed the latest bug fix updates with iOS 9 support for all of them. I do not know. If you’re having problems, try reinstalling the app. If that doesn’t work, provide some feedback to the developer.

iOS 9.0.1 Battery Life

I’ve been using the iPhone 6s iOS 9.0 update for just one day, but I haven’t noticed any major bugs in the software. The iPhone 6’s battery looked pretty good with iOS 9.0 built-in. The same goes for iOS 9.0.

I haven’t noticed anything out of the ordinary, at least not yet. The device’s battery is on par with the battery life I got from the iPhone 6 with built-in iOS 9.0.1. So I was able to use the phone all day without needing to charge it.

Keep in mind that if you’re using a ton of LTE data, your iPhone battery will drop much faster than if you’re using Wi-Fi primarily. I primarily use Wi-Fi and can go from 8am to 8pm without having to plug it into a charger. This is fine with me.

If you’re seeing something strange, take a look at our list of fixes for bad iOS 9 battery life. If you can’t find a fix, take it to an Apple Store. You have a one-year warranty, so Apple has a chance to replace it for you for free.

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Wi-Fi, Cellular Data and Bluetooth

Connection problems are extremely common. iPhone 6s users have been complaining of various issues outside the doors but I haven’t noticed anything.

I was able to successfully pair it with several different Bluetooth speakers, headphones and Toyota Prius. I’ve managed to throttle down excellent speeds on the various routers I have. They include a Verizon FiOS router and C9 Archer.

iPhone-6s performance

AT&T’s network is also extremely fast and efficient. And I’m using a T-Mobile iPhone 6s that I bought from Apple. No complaints here, at least not yet.

Connection problems can occur at any time and so I made some memory fixes. They will help me deal with them when and when they come.

iOS 9.0.1 Issues on iPhone 6s

iOS 9.0.1 has issues and there insects but none of them affect my daily routine. And while this security flaw is a bit of a nuisance, it will take a really good thief to not only steal my iPhone but to make the exploit work.

I’ve only been using this phone and this new software for a few days. While I’m sure there weren’t any catastrophic game-changing issues on board, it’s possible I overlooked some minor bugs and issues. None of them jumped at me but that could change in the coming hours, days and weeks.

If you’ve run into bugs or issues, or want to get a head start before installing iOS 9.0.1, check out our list of fixes.


If the iPhone 6 is Justin Gatlin, the iPhone 6s is Usain Bolt. Both are fast, but the iPhone 6s is noticeably faster.

Folders, apps, everything opens faster on the iPhone 6s. This is a product of the secret changes Apple made to its new flagship.

You should not notice any slowdown or sluggishness with the iOS 9 update. If you do, check out our details on slow iOS 9 performance.

If nothing helps, cross your fingers and hope iOS 9.1 brings improved performance to your device. It just might.

Should You Install iOS 9.0.1 Now?

iOS 9.0.1 is a minor update, but it fixes potentially annoying issues. As a reminder, here they are:

I haven’t faced any major issues with the iPhone 6s. The performance is extremely stable and my apps and battery life hold up.

If you’re doing well on iOS 9.0 and you’re feeling a little nervous, don’t hesitate to wait a few more days so we can investigate further. There are some important fixes in iOS 9.0.1, but if you don’t notice anything in iOS 9.0, no need to rush.

iOS 9.1 will be out in about a month, so if you want to wait for this landmark update, you can. I’ll be back in October with a full review of iOS 9.0.

Moyens Staff
Moyens I/O Staff has motivated you, giving you tips on technology, personal development, lifestyle and strategies that will help you.