iOS update in iphone 6

You cannot pick and choose an iOS version. What you get is Settings > General > Software update > [All options are available here]

If iOS updates are no longer being released for your device, it typically means that the device has reached its end of life in terms of software support from Apple. In such cases, there are a few options you can consider:

1. Although major iOS updates may no longer be available, Apple may continue to release security updates for older devices. Ensure that your device is running the latest available version of iOS for its generation to maintain the highest level of security.
2. As iOS versions advance, some newer apps may not be compatible with older iOS versions. You may need to rely on older versions of apps or find alternative apps that are compatible with your device's iOS version.
   1. Ask the App developer to release the app for lower iOS versions also. Netflix & Amazon has done it.
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3. If your device is no longer receiving software updates, it may be a good time to consider upgrading to a newer device that is supported by the latest iOS updates. Upgrading to a newer device will ensure that you continue to receive the latest features, security updates, and app compatibility. Selection of a mobile model/brand is driv… - Apple Community

Remember to regularly back up your data to avoid losing any important information during the transition to a new device.

It's worth noting that the availability of updates and options may vary depending on the specific device model and its hardware capabilities.

You can update your iPhone to iOS 12.5.7 by going to Settings -> General -> Software Update and installing the particular update.

Make sure your iPhone has

• charged to at least 50%
• preferably connected to the charger
• disabled any VPNs
• disabled Low Power Mode
• connected to a fast, reliable Wi-Fi
• at least 6GB of free storage

However, your iPhone cannot update to iOS 13 or later due to your internal hardware being too old to support it.

Apple ended major software update support for your iPhone in September 2022 - although it continues to receive security updates - with the most recent being iOS 12.5.7, released in January 2023

The iPhone 6 is almost 9 years old.

iPhone 8 and later models are capable of supporting iOS 16.

You may consider buying a new iPhone. Even the entry-level iPhone SE can run the latest iOS version, iOS 16.5.

Here is a list of unsupported iPhones with max iOS supported:

Model            Architecture  Introduced       Max supported iOS
iPhone (1st)     32-bit        June 2007        iOS 3.1.3
iPhone 3G        32-bit        July 2008        iOS 4.2.1
iPhone 3GS       32-bit        June 2009        iOS 6.1.6
iPhone 4         32-bit        June 2010        iOS 7.1.2
iPhone 4S        32-bit        October 2011     iOS 9.3.6
iPhone 5         32-bit        September 2012   iOS 10.3.4
iPhone 5C        32-bit        September 2013   iOS 10.3.3
iPhone 5S        64-bit        September 2013   iOS 12.5.7
iPhone 6         64-bit        September 2014   iOS 12.5.7 <- Your iPhone model
iPhone 6 Plus    64-bit        September 2014   iOS 12.5.7
iPhone 6S        64-bit        September 2015   iOS 15.7.6
iPhone 6S Plus   64-bit        September 2015   iOS 15.7.6
iPhone SE (1st)  64-bit        March 2016       iOS 15.7.6
iPhone 7         64-bit        September 2016   iOS 15.7.6
iPhone 7 Plus    64-bit        September 2016   iOS 15.7.6

An iPhone 5S 6/6plus can't be updated beyond 12.5.7, it doesn't have the hardware needed to run anything higher.

If you need a higher iOS version, you will have to purchase a newer phone.

i want to update my phone