Resetting series 1 Apple Watch to lower version software to use with iPhone 6
I got a new series 5 Apple Watch. I wanted to give my series 1 watch to my granddaughter who has an iPhone 6. It does not want to pair because apparently even though I reset the watch to factory settings - it doesn’t take away the watch os updates. Is there a way to get it back to os5 so she can pair it with her phone ? (And no another phone is not an option )
thanks
iPhone 6