1. Launch Apple Watch app on your iPhone.
2. Tap on My Watch at the bottom.
3. Tap on Passcode.
4. Tap on Change Passcode.
5. Next up, enter the current passcode followed by the new passcode twice.
We have a satisfaction guarantee... those are the directions maybe you can explain to me why it did not work? What happened exactly?
Those are the instructions to reset the password ***** last question.... to change from one phone to another:
Unpair your Apple Watch from the iPhone 5, open the Watch app on your iPhone, tap the My Watch tab, then tap Apple Watch > Unpair Apple Watch. Tap again to confirm. If asked, enter your Apple ID password. Keep your Apple Watch and old iPhone close together until you finish unpairing them.
To pair to new iPhone 6:
Open the Watch app on your iPhone.
Then tap a language on your Apple Watch. To scroll through the list, rotate the Digital Crown or swipe the screen.
Tap Start Pairing on your Apple Watch and again on your iPhone. A pairing animation should appear on your Apple Watch.
Center the watch face in the onscreen viewfinder on your iPhone until a message says Your Apple Watch is Paired.
If you don’t see the pairing animation or if your iPhone doesn't read it, you can pair your devices manually.
I am assuming that you already moved your data from the iPhone 5 to the iPhone 6...