I have iCloud account on my old unused iPhone 4 can I transfer it to this recent iPhone 5
I have iCloud account on my old unused iPhone 4, could it be transferred to my recent iPhone 5s
iPhone 5s, iOS 12
Yes, just sign in. The acount is on Apple's computers, not your devices as such.
Sign in with your Apple ID - https://support.apple.com/HT204053 - Mac and iOS
Set up iCloud on your iPhone, iPad, or iPod touch - https://support.apple.com/HT208681
Get help with iCloud - https://support.apple.com/HT203512