How do I transfer from my computers icloud to my 6S iphone?
After you have all neccessary data on iCloud, then put your SIM card into your new iPhone and turn it on. Begin setting your iPhone up. You will be prompted to select a Wi-Fi network and language. Then, choose Restore from iCloud backup. Use your Apple ID to sign into your iCloud account. Click Next, and agree to the Terms and Conditions. Choose your most recent backup from the list of options and enter your iCloud password if you are prompted to do so.
https://macback.us/tutorials/how-to-transfer-data-from-iphone-5-5s-to-iphone-6-6s/