Why can't I update my phone?

[iMore Question]

I can't update my phone

I have a iPhone 4 it won't update to the new software please help me

 

[kch50428]

Re: I can't update my phone

https://support.apple.com/en-us/ht204204

 

[hhashimi]

I can't update my phone

iPhone 4 does not receive the new update.
According to Apple, compatible iOS 8 devices include:
The iPhone 4S.
The iPhone 5.
The iPhone 5C.
The iPhone 5S.
The iPod Touch fifth generation.
The iPad 2.
The iPad with Retina Display.
The iPad Air