I need to update 12.5.5

You can update your iPhone 5S to iOS 12.5.5

Check -> Go to Settings -> General -> Software Update

See the following Apple articles:

Update your iPhone, iPad, or iPod touch

Update your iPhone, iPad, or iPod touch - Apple Support (IN)

If your iPhone, iPad or iPod touch won’t update

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

You can do the update via PC, see this Apple article: Update software on iPhone, iPad or iPod touch in iTunes on PC

Update software on iPhone, iPad or iPod touch in iTunes on PC – Apple Support (UK)

If you have a Mac see this Apple article: Update your iPhone, iPad, or iPod touch with the Finder

Update your iPhone, iPad, or iPod touch with the Finder - Apple Support

You need to have good Service & Wi-Fi.

If they are On, turn Off Hotspot & VPN.

azaraslam20 wrote:

I need support my phone 12. 5.5 version

About iOS 12 Updates - Apple Support

If you are saying that you have already updated your iPhone 5s to iOS 12.5.5, that is as far as updates will go for the iPhone 5s. There are no more updates available for your phone.