I have a apple iphone 6s 128gig but does not want to upgrade to latest iOS 15 it’s stuck on 12.5.5 please help me to get it to iOS 15I have a apple ihpone 6s 128gig but does not want to upgrade to latest iOS 15 it’s stuck on 12.5.5 please help me to

I have a apple ihpone 6s 128gig but does not want to upgrade to latest iOS 15 it’s stuck on 12.5.5 please help me to get it to iOS 15

iPhone 6 Plus, iOS 12

Posted on Dec 5, 2021 1:19 AM

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Posted on Dec 5, 2021 1:35 AM

If you cannot update your phone past iOS 12.5.5 it is not a 6S, it is a 6 (or 6 Plus). iOS 12.5.5 is a special version of iOS 12 released exclusively for phones with 1GB RAM (iPhone 5/5S and iPhone 6/6 Plus). All subsequent versions require a device with 2GB (or more) RAM.


If you need to use apps which require a newer version of iOS, you will need to purchase a new phone. Most - if not all - developers have long since stopped supporting devices with 1GB RAM.

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Question marked as Top-ranking reply

Dec 5, 2021 1:35 AM in response to shaky112

If you cannot update your phone past iOS 12.5.5 it is not a 6S, it is a 6 (or 6 Plus). iOS 12.5.5 is a special version of iOS 12 released exclusively for phones with 1GB RAM (iPhone 5/5S and iPhone 6/6 Plus). All subsequent versions require a device with 2GB (or more) RAM.


If you need to use apps which require a newer version of iOS, you will need to purchase a new phone. Most - if not all - developers have long since stopped supporting devices with 1GB RAM.

Dec 5, 2021 1:23 AM in response to shaky112

Your profile says iPhone 6 Plus, Your post says iPhone 6S Plus.


iOS 12.5.5 is not possible on iPhone 6S Plus.


These are the iOS options based on iPhone Model --> You need to correctly Identify your iPhone model - Apple Support

  • iOS 15.1.1 —> 6S / 6S Plus, SE (1st Gen and 2nd Gen), 7 / 7 Plus, 8 / 8 Plus, X, XR, XS /XS Max, 11,11 Pro /11 Pro Max, iPhone 12, 12 Mini, 12 Pro, 12 Pro max, iPhone 13, 13 Mini, 13 Pro, 13 Pro Max
  • iOS 12.5.5 —> Final release supported on iPhone 5S, iPhone 6/6 Plus, 

Learn how to--> Update your iPhone, iPad, or iPod touch - Apple Support




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I have a apple iphone 6s 128gig but does not want to upgrade to latest iOS 15 it’s stuck on 12.5.5 please help me to get it to iOS 15I have a apple ihpone 6s 128gig but does not want to upgrade to latest iOS 15 it’s stuck on 12.5.5 please help me to

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