How do I install iOS 15 on my IPhone 6 PLUS

Yusufmuhammadwasilu wrote:

How can I install ios15 on my iPhone 6plus

You have an iPhone 6 Plus, and wish to update to iOS 15.

Nope. Not supported. Not happening.

iOS 12 is the end of the line for iPhone 6 and iPhone 6 Plus; to iOS 12.5.7, currently.

You’ll need a newer (used, refurb) or new iPhone.

An iPhone 6S or iPhone 6S Plus can update to iOS 15; to iOS 15.8.2, currently.

Any recent iPhone will be substantially more capable than an iPhone 6, 6 Plus, 6S, or 6S Plus, as well.

Here is how to: Identify your iPhone model - Apple Support

Whatever app or service you are seeking to use effectively requires an iPhone 6S or newer.