How can updated my phone

Assuming you have a compatible device, see: Update your iPhone, iPad, or iPod touch - Apple Support

And: If your iPhone, iPad, or iPod touch won't update - Apple Support

If the above Apple articles do not help, please post back with relevant information. 

fayona192 wrote:

I can’t updated my phone

No?

What happens when you attempt to update?

Any error message?

What is the existing version of iOS?